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Fact Buster
Q: Will taking vitamin B stop mosquitoes biting you?
A: No, it makes no difference.
Published 14/11/2007
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Have your say
What was your experience? Do mozzies love or loathe you? Tell us on the messageboard below.
Conditions of Use
There's no doubt mosquitoes prefer some people over others, but can vitamin B turn someone who is usually a target for mosquitoes into a turn-off.
Although this home remedy is often espoused in the popular press there's no solid scientific evidence to back it up. Medical entomologist Dr Cameron Webb says taking vitamin B before your next BBQ will do little to keep mosquitoes at bay.
He says while some people are more attractive to mosquitoes others simply have a stronger reaction to mosquito bites. It's a reaction to the mosquito's saliva – injected during the bite – that gives you an itchy lump the next day, like all allergic reactions, the severity varies from person to person.
There are a number of other variables that can affect our reaction to bites including how repellent each mosquito finds us, the species of mosquito that is biting us and where we are bitten (as in geographical location Sydney vs Cairns).
Given that mosquitoes can be carry some very nasty diseases – in addition to being extremely annoying – it's a good idea to take precautions if you suspect they're around:
- wear long, loose, light-coloured clothing
- use a repellent containing DEET or picaridin (avoid your face and wash your hands after applying, make sure kids use one that's suitable for them)
- sleep under a mosquito net and close any unscreened windows
- keep your home and garden free of mozzie breeding sites.
Finally, if you're travelling overseas make sure you speak to your GP about whether you need any vaccinations or medications for mosquito-borne diseases.
Dr Cameron Webb is a hospital scientist with Department of Medical Entomology at Westmead Hospital's Institute of Clinical Pathology and Medical Research. He was interviewed by Claudine Ryan.
Dr Cameron Webb is a hospital scientist with Department of Medical Entomology at Westmead Hospital's Institute of Clinical Pathology and Medical Research.
More Questions »
Comments (78)
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mikala :
21 Oct 2008 5:32:02pm
What works?
- Fresh lime/lemon
- Vitamin B
- A sting-relief spray (awesome!)
First I can say that while traveling Vit B has been prescribed to us.
Another little trick I learned from my mother is to rub fresh limes or lemons on your skin. Once I ate dinner next to a pool garden and was getting eaten alive, so I asked the water for limes and rubbed them on my legs and arms. It leaves lime bits but no mossies!!!
Also last night I woke up as a mossie bit me twice on the arm. Then I sprayed the sting relief spray on the bite. In the morning the bites completely disappeared you would have thought it was just a dream. The itchiness and allergic reaction is GONE! -
Anne-Sophie :
19 Oct 2008 12:05:16pm
Summer is that time of year I have to be careful about. This season I am going to try very hard to avoid the nasty mosquitoes. I like the advice about light, loose coloured clothing. And Eucalyptus oil from one of the other users.
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KW :
17 Oct 2008 10:05:31am
Mossies just love me. I can be in a crowd of people and I am often the only one attacked by the mossie. I have found eucalyptus oil rubbed onto skin most helpful.
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Draxie Craddock :
31 Jul 2008 6:34:45am
The female mosquito attacks me has soon as i go out the door, I have bite marks every where on me. Do you no anyone that can help me
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Tom Richards :
28 Jun 2008 9:53:24am
Vitamin B works for me but it doesnt work for everybody
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profmac :
12 Jun 2008 9:42:34am
1.no doctor will stop you from boosting you b vitamin intake.B's must be renewed daily (vegemite and all that)
2. B's Thiamin and riboflavin have a smell that would put even ants off. If you are a sweater you are in luck. Even other humans can detect the smell of someone on these b vits.
3. Do not overdose. More is not better with any over the counter or prescription drugs/products.
4. Make a little paste with one tablet or capsule and some simple cheap cream. Apply to unprotected areas andwatch for results.Also well woth trying on an existing itchy.
5.(disclaimer)Use any advice given here at your own risk.
NOTE: Mosquitoes use visual, thermal, and olfactory stimuli to locate a host. The reason that there are so many differing ideas about stopping the bite, is simply beacuase most of them work well for the people who try them."horses for courses"
alternatives for people who do not want to overuse DEET particularly on children (a wise idea) can be found at http://www.thedailygreen.com/environmental-news/latest/deet-insect-repellent-460607-
profmac :
12 Jun 2008 9:52:59am
meant to add that picardin based products were extensively tested by the Australian Army in the tropical zones of Queensland. The results showed it to be equally effective for biting insect
ontrol, but not as long lasting. It is arguably a much safer chemical than Deet and is recommended by the World Health Organization as the best protection against Malaria.
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Arlene :
02 Jun 2008 4:55:36am
Here in upstate New York, near the Canadian border, we fight the mosquitoes with Garlic tablets. I can't use deet or other chemicals, so the herbal way works for me. I get a odorless caplet I take daily. This also seams to help against other buggies also. Good Luck
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Jeremy :
26 May 2008 7:56:44am
Vitamin B definitely worked for me - but it required several weeks of taking it before the difference was noticeable. It wasn't a different reaction to bites - I wasn't being bitten (and others were)(and usually it was the opposite). Worth a try!
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Jackie :
16 May 2008 4:16:11pm
With the topic on mozzies being discussed, does anyone know why ALL year round my house has mozzies. We live in Melbourne in the Dandenong's and some nights it gets down to 2 degrees in winter yet when we go to bed I still hear mozzies buzzing around my ears! We have fly screens on all the windows and our bedroom is upstairs so we have no idea how they are getting in each day apart from the front door but that means they then FLY upstairs EVERY day. Some mornings we can kill about 6 in our bedroom and that is AFTER we have already hunted and squatted some before going to bed the night before. We have tried having a bug zapper IN our bedroom but believe it or not , that doesnt work. I would use a mozzie "plug in" gadget but i used that in the ensuite and still got the odd mozzie that night in the bedroom and i dont really want to use the plug in directly in our bedroom as i am concerned what chemicals it is releasing and dont want to sleep every night with it right under our noses, so to speak. Outside we do have a pond but I am so surprised that we are getting them even in winter and it is so annoying. Any idea how these pests would be getting upstairs each day ??????? HELP!!!
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naturesearch :
10 Mar 2008 9:51:33am
We had horses and when fed molasses, seemed to make mosquitos worse, and I had heard people who had sweet tooth more prone to bites,I guess attracted to sweetness? Smell or flavour?
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JoD :
06 Mar 2008 5:16:14pm
I used to think mossies didn't bite me while they feasted on my husband & daughter, then I realised (by observation) they actually were biting me but I just didn't get the extreme, itchy allergic reaction they did. So I don't think mossies discriminate its just our reaction to them that varies
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angelina rosa :
22 Feb 2008 1:43:50pm
i never get bitten by mozzies! ive heard that a certain blood type makes you rarely get bitten, but im not sure?? any theories?? xxx
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Angie :
08 Feb 2008 2:50:25pm
The only thing I have found to help with the itch is Stop Itch Plus cream rubbed onto clean skin, it also seems to help them heal a lot faster. I will try the Vit B though, as a kiwi living in Qld I am a major target. Also found some info regarding why some bites react more than others, some flies are 'suckers' and some actually serrate the skin and feed from the blod pool which is more damaging. Anthistamines do work well also I find and make sure you reapply repellent after swimming or sweating. Another thing I do, like most women my handbag is a first aid kit, etc... I carry a mini repellent spray, you can get so many now which are natural and scent free.
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Noel Slabbert :
21 Jan 2008 1:34:53pm
Inspite of the fact that Vitamin B is not supposed to do anything to ward off mozzies - I have found that longer term treatment does seem to help so individuals. Howevre taking a Vitamin B tablet just before going outside seems to have no effect.
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Martin :
08 Jan 2008 8:55:01am
I have been bitten by mosquito's my whole life! My reactions are quite severe, the only thing that has ever worked for me is a Mosquito-Click. All I do is click on the bite, and within minutes, the bite and the swelling disappears. I would never have believed it, but its a miracle! Anyone who suffers has to get one.
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El :
14 Jun 2008 1:34:21am
Yes, we have found the mozzie click works really well. No chemicals and it seems to just break down the stuff that makes you itchy. Our kids all prefer it to the creams and it seems to work better too.
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s. :
20 Jul 2008 5:31:07am
what is a mosquito click??Are they for sale in the state?? Help, I'm a mosquito magnet!
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Kay :
07 Jan 2008 6:13:40pm
I have been badly bitten by sandflies and mozzies. Have tried all sprays, commercial and homemade, without success but find that taking Vitamin B1 does work for me. I start taking it several weeks before travelling to the tropics, or all through summer. Also Vicks Vaporub offers relief from the itching. I think it's the menthol.
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Tamu :
29 Dec 2007 2:28:13am
Hi I think they like Asian people.... my friend and me from Asian background who lived western people have been bitten...don't know why....also we guess they love black hair, dark colour clothes, people who have high temperature or blood type O....we can not live without spray anytime anywhere in here.
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ingrid :
28 Dec 2007 9:44:29pm
i almost never get bitten my mozzies, and i cant stand vegemite, its the most terrible tasting thing ever. so i dont know why i dont get eaten alive.
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Peter :
27 Dec 2007 10:16:01pm
In a group I am usually the only person who does not get bitten. The only reason I can put this down to is the fact that I love my vegemite (B12).
Go figure! -
Brian :
20 Dec 2007 5:12:08pm
Hi all
I arrived in Queensland just over 2 months ago, with my wife and 3 kids, in the period from then till now, i have been eaten alive by mosies and sand flyies, so bad i come out in large lumps on my legs and arms but never my face, while my wife and kids have not been bitten once....
I have a hunch it may be blood type, of all the family i am the only one who has B Rehus- blood type, the rest are Rhesus + do the mosiea and sand flies like my blood better....
any cure for the tennis ball size lumps would be appreciated-
Richard :
03 Jan 2008 5:50:28pm
Do you have a high stress level as this puts phenols on your skin as stress hormones and may excit the mossi. Try dencorube as it smells horrid and mossi do not like it.
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Linda :
19 Feb 2008 9:36:32pm
Nope can't be your blood type i am A+ and mozzies love me. I have only recently become more sensitive to their bite. i have mozzi bites now and they are about the size of a 10c piece and as they are starting to heal look like a bruise.
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Wendy W :
09 Dec 2007 5:50:16pm
Has any work been done to see if it is your blood group that attracts mosquitoes. I have 0neg. blood group. They love me
& bite me anytime of the day
before biting anyone else. I am so sick of being their
dinner. I cover myself with
spray but still get bitten. -
robyn .m. :
09 Dec 2007 12:40:18pm
I too suffer very badly to the mossie bite,pus,so itchy that my legs swell and are very painful.Started taking Vit B 2 weeks ago,doesn't seem to be working for me,might try natural remedy any suggestions, my legs look disgusting from the bites.
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Julie :
27 Sep 2008 6:13:52pm
Hi, Have you found anything yet?
I get bitten all the time and only 50% of the bites heal. My legs are covered in scares and now my bum. I got bitten on my tummy the other day too and I have tried tiger balm, vit e, bio oil, dettol, savlon and 3 types of prescription creams. Im only 24 so I still wanna wear short skirts and bikinis...
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seajay :
28 Nov 2007 1:20:24pm
DEET has been used extensively throughout the world since the 1950s and would be one the most researched chemicals in human use. There have been so many papers on its safety that a 5-minute google search will answer any questions. Conclusion: IT IS SAFE.
Evidence to support vitamin B as a bite preventative: NONE.
Given the enormous amount of easily accessible and reliable information avaiable on the internet these days there is no excuse for the persistent ignorance so many people seem to display. -
Bobbie Barfield :
27 Nov 2007 1:31:02pm
I am just as concerned about putting insect repellant containing DEET onto my skin. What research has been done on this about how much gets into our system and the damage it can cause.
I have travelled extensivley in Australia and overseas and find the following hels me. Prevention: Use a mix of 50mls carrier oil (I use sweet almond or rice bran) 15ml pure essential oil of lavender, 2 mls of pure citronella oil. Shake, rub on exposed skin. Wear light loose clothing. After being bitten: take an antihistamine, dab spot(s) with pure essential lavender oil(it's an anti inflammatory, antifungal and antibacterial). Good Luck! -
Davo :
26 Nov 2007 6:03:37am
I'm not sure about the science, but if you apply heat (in the form of say, a cloth dipped in hot water, or a spoon dipped in a cup of hot tea or coffee NB: NOT BOILING HOT, but say around 50-70 degreesC... make a cuppa, wait 3 minutes; then apply) directly to the bite and then resist scratching it for a few moments, the itch will disappear and the swelling will reduce. I suspect that it has something to do with the itch being caused by some kind of enzyme which is destroyed by heat as enzymes denature at 40 degrees C (if I remember my matric biology correctly!) I've found that in most cases the itch may come back after a few hours, but after another application or two the itchiness of the bite will disappear; much quicker than it would if you scratched it... which doesn't work even when you scratch bites until they bleed. Wanna ask me how I know? Hope this helps anyone who is prone to being eaten alive by the nasty little bloodsuckers!
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Peter Burrows :
22 Nov 2007 9:20:55am
One of my daughters comes up in large welts when bitten by a mozzie and they are very very itchy. We took her to a number of doctors in Singapore (where we were living at the time) and they all prescibed vitamin B, she no longer gets bites or on the odd occasion when bitten she does not get the lumps. It works for her no boubt.
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joley :
01 Dec 2007 9:26:29am
When I first moved into my house 25 yrs ago, there were septic tanks behind the house. Mosquito bites would turn into 10 cent size white lumps. Once the sewer went in, 12 months later, the bites no longer came up in big lumps. But they were still itchy.
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unbitten :
21 Nov 2007 11:54:18am
I find that BREWERS YEAST works for me - daily ingestion = no mosquito bites
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Megan :
20 Nov 2007 5:40:47pm
Lived in PNG for several years. Did not take anti-malarials. Managed to avoid mossie bites and the dreaded malaria by using repellant, & wearing lightly coloured full cover-up clothing ...not much fun in the heat! However, many Ozzie mossie bites later I now seem to have developed a nasty allergic dermatological response to insect bites in general...after trial and error, my answer is to take an antihistamine when bitten .... that works well. No reaction. A friend was recently bitten on leg by mosquito and quickly developed cellulitis, is in hopsital. Be careful!!!
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Alex :
20 Nov 2007 10:17:11am
I have lived for many years in the tropics where mosquitoes are potentially fatal pests, carrying both dengue, yellow fever and malaria. I endorse the article's conclusions but would add a few more suggestions. First that prevention works best - don't leave anywhere for mosquitoes to breed (no standing water) and keep the shrubs back from your house. Second, I have found that Vitamin B6 changes the scent of your skin and repels some species of sandflies, but not mosquitoes (the scent change takes a week or two to occur). And finally, according to local Solomon Islands lore, if you don't wash they don't bite. Can't say I recommend the overall effect though.
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Margaret Galbraith :
19 Nov 2007 9:37:44pm
Sorry should have said 20mg of depo-medrol in the previous comment
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Margaret Galbraith :
19 Nov 2007 9:31:40pm
I have a severe reaction to mosquito bits. The first day I have the normal red bite showing and the second day I have severe flu type symptoms with feeling of going to be sick all the time and the bite site has a large blister full of fluid. Every year around Oct/Nov I have a 2.5mg injection of depo-medrol three times two/three weeks apart and this seems to help the condition. I then only have a red dot where the bite has occured instead of the debilitating symptoms.
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Prof Stuart B. Hill :
19 Nov 2007 2:18:13pm
As an entomologist and organiser of summer camps for children in Canada for 20+ years, where there are lots of mosquitoes, I can confidently say that as well as wearing light clothing (that has not been washed with detergents with perfumes), wearing no perfumes, and using the usual repellents (or making your own from 'Dettol' and baby oil, which is very effective), it DOES help to have a diet with little or no meat, especially red meat, no bananas, and with some supplementary 'brewers yeast' (better than Vitamin B pills) - it is true that for most people just doing the latter won't make enough difference on its own - happy days, Stuart
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diane :
19 Nov 2007 10:02:54am
my husband gets badly bitten by mosquitos and sand flies but they don't bite me much at all.
i take executive strength vitamin b, he did not until lately. after years of watching me not get bitten, he is convinced. -
Julie :
17 Nov 2007 10:36:23pm
I have been a prime target for mozzies all my life. I have been taking Vit b complex for many years now, and they still love me. Today I was in the garden and got many bites, but I later had one get so full on me it could not fly. I squished it on the table and my drop of blood went everywhere. I react mre severely to sand flies tho.
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Lynda Graf :
16 Nov 2007 4:44:11pm
The burden of proof is clearly on those who say vitamin B works to repel mozzies. A mechanism of action would be needed to convince me. Anecdotal evidence such as comments posted here are definitely not reliable. BTW - they love to bite my daughter and I.
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Thea van de Mortel :
16 Nov 2007 11:12:46am
Here are some facts for you: No ingested compound, including garlic and thiamine (vitamin B1), has been found to be capable of repelling biting arthropods (Comparative Efficacy of Insect Repellents against Mosquito Bites. Mark S. Fradin, M.D., and John F. Day, Ph.D. New England Journal of Medicine, Volume 347 (1):13-18 July 4, 2002).
This paper cites three studies to support this statement:
1. Khan AA, Maibach HI, Strauss WG, Fenley WR. Vitamin B1 is not a systemic mosquito repellent in man. Trans St Johns Hosp Dermatol Soc 1969;55:99-102. [Medline]
2. Strauss WG, Maibach HI, Khan AA. Drugs and disease as mosquito repellents in man. Am J Trop Med Hyg 1968;17:461-464. [Free Full Text]
3. Food and Drug Administration. Drug products containing active ingredients offered over-the-counter (OTC) for oral use as insect repellents. Fed Regist 1983;48:26987-26987.
Hope this helps -
redbod ®:
16 Nov 2007 8:44:17am
Mosies, sand flies, in fact almost anything that bites/sucks blood find me irrisistable and no amount of vit b, bread, marmite (vegimite) stops them. the only benefit seems to be that when I am around they stay away from everyone else!
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Helen :
16 Nov 2007 7:51:43am
During my first year in Australia, mossie bites swelled to the size of saucers. Someone theorised that they loved my pale British skin. My equally pale husband was left alone. I sought no treatments or preventatives, but after that first year I have only ever had "normal" (mild, but irritating) reactions. I assume something happened within my immune system as a result of the initial bites.
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Pickles Mum :
16 Nov 2007 12:18:01am
My daughter and I suffer terribly from mozzie and sandfly bites. During the summer months (we have a holiday van at the beach) we take vitamin b in liquid form daily - it tastes terrible!!! As long as we keep up the dosage daily the mozzies and sandflies leave us alone - slack off and we pay for it!!! Persistence works for us!!!!!!!!!!!!
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Kaye Meyer :
16 Nov 2007 12:04:07am
We ( family of 7) moved into a new house in February this year. I haven't had one mozzie bite yet the rest of the family are bitten regularly. I heard it is the how you breathe. Whether you are a nose or mouth breather?
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Wills :
15 Nov 2007 10:54:14pm
I added Vit B1 to a repellent and rubbed it onto my arm. I put my arm into a mosquito cage at Bureau Of Standards test faciliy. Within 10 secs I had about 50 bites. Seems the mossies liked B1
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Michael :
15 Nov 2007 10:30:11pm
I take 2 Mega B Vitamin capsules eveyday and the mozzies still bite me !!!!!!
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Tony :
15 Nov 2007 10:06:20pm
Could we get reply from Dr Webb re the basis for the comment "no solid evidence" queried above? Ie some references to the research please....
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Brian :
15 Nov 2007 8:18:42pm
Taking vitamin B does not work I tried it over a period of two years I'm still itching
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Chris Super Smart :
15 Nov 2007 7:10:57pm
Here is a test, go for a run at dusk.
The next day take a cool shower and wash with soap at dusk.
Repeat this experiment several times :) see what you get. I already know the answer. -
Christine :
15 Nov 2007 6:54:55pm
I was never bothered by mossies at all until I reached the mid fifties...now they hone in on me all the time! (I have always been biten by sandflies though, when holidaying in Qld)
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Steph :
15 Nov 2007 6:52:09pm
I've lived in this area for 12 years. In the 4th yr. I was bitten by Sandflies - 111 bites - full blown blisters stretched and meeting. In bed for 2 days and dressing the bites 3 times a day, Vit B notwhithstanding. I think it's relevant to seasons, as in, sometimes many, sometimes none. e.g. no 'March Flies' for several years; no little black flies for years, but this year they're back again. (Ecchh!).
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Robert Smart :
15 Nov 2007 6:09:07pm
Notice that the phrase "there is no solid scientific evidence to back it up", and similar phrases that litter other medical reporting, are completely meaningless without some additional information about what studies have been done and the quality of those studies. I strongly urge you to look at this item and ask yourself: which is more convincing, the scientist's disclaimer or the anecdotal reports in the comments. Then decide that you won't let scientists get away with that sort of incomplete comment again.
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Richard :
15 Nov 2007 6:58:26pm
Spot on Robert Smart. Where is the research dispelling this "myth"? This piece is opinion posing as science. Better suited to Nexus Magazine than the ABC.
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Chris Super Smart :
15 Nov 2007 7:08:51pm
Oh no its the homeopaths eeeeek
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Lea :
16 Nov 2007 7:25:42am
The burden of proof is on those claiming that vitamin B is effective. Scientists cannot be expected to research every half-baked theory to establish evidence it is false. The writer simply states there is no evidence it is true. And the anecdotal evidence here in the reply posts seems to de-bunk the theory anyway. Havings said all that - I'd be really glad if vitamin B did keep the mossies at bay!
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emm :
07 Nov 2008 4:12:46pm
I moved up to QLD and was badly bitten by sandflies, I was never one to beleive in vitamins and all that hippie type shit, My doctor gave me things to cure but not prevent bites (useless waste of time).A lady at a chemist said try a vitamin B supplement, it worked like a dream after taking it for 3 days, then I tried an experiment and stopped taking it and put a cup of water in a spray bottle and about 2 tablespoons of the supplement in and sprayed on myself and around the house, it also stopped mozzies and sandflies from coming into the house. This is proof that scientists and doctors are up to something or are stupid or want us to get bitten so they get more appointments to come and see them from unknown side-effects of insect bites.
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David Mayne :
15 Nov 2007 5:16:55pm
Being bitten by the female mosquito.
The geographical location, the time of the year, and the current weather.
The female mosquito is attracted many different condititions on the human body. One of these is the difference between human males and females. The presence of lactic acid and several other acids. The skin temperature and humidity. -
eileen :
15 Nov 2007 5:14:05pm
When I first came to Sydney the mossie bites on my legs used to grow to the size of half a table tennis ball, full of watery pus and were very painful ... luckily I found a doctor who had worked in the tropics for 12 years ... he told me to saturate my system with Vitamin B Forte and a miracle happened ... they left me alone ...
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Bob D :
15 Nov 2007 4:55:45pm
Back about 30 years the sandflies and mosquitoes used to home in on me and I really felt the effects. The sandfly bites used to be lumps up to 40mm diameter. In my latter years I have taken multi vitamins regularly and the sandflies and mosqitoes dont bother me. The mosquitoes will bite others before me. I regularly go to a North Queensland beach side village now without a concern. I still get the occasional sandfly bite but they never get bigger than about 2mm and they dont itch. For whatever reason, vitamins have helped me a lot.
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Susan :
15 Nov 2007 4:51:21pm
I take Brewers Yeast (high in Vitamin B) every day and mosquitoes never touch me
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Mary Frances :
15 Nov 2007 4:47:02pm
Mozzies love me. I find if I can resist the first urge to scratch then there is no later trouble. Does anyone find eating garlic keeps mozzies at bay?
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Tim :
15 Nov 2007 4:38:30pm
DEET is a toxic petrochemical, the ABC reported that catnip oil is 10 times more effective.
http://www.abc.net.au/science/news/stories/s355524.htm -
rose :
15 Nov 2007 4:01:57pm
They hate me, even if am the only one around, I am never bitten
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shelley :
15 Nov 2007 3:58:54pm
Mossies love me. I am generaly a "reactor" type person ie headaches from fragrances etc. has anyone tried the mossie catcher devices that release CO2?
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Madeleine Edgar :
15 Nov 2007 3:51:51pm
My husband takes B1 daily. He soon knows if he forgets, as he's very fair skinned & they go for him.They don't bother me!
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Ev :
15 Nov 2007 1:36:05pm
They love me
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Janine :
15 Nov 2007 4:29:32pm
I find that apply lavender oil before and/or after helps.
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Richard :
03 Jan 2008 5:58:24pm
I bet your stressed out. Richard
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