??? dans le doute, j'ai ete sur internet, j'ai trouve ca :
Does vitamin B-12 help prevent mosquito bites or, at least, reduce the affect of bites? If B-12 isn't the answer, what is?
There is some debate on this matter.
The use of B12 is mixed. You can try using B complex (50 to 100 mg a day), especially B1 (50 to 100 mg one to two times a day) and B12 (1, 000 mcg a day) to prevent as well as a mosquito repellent. Vitamin C helps reduce histamine release, resulting in a milder reaction, and can be considered Bromelain (250 to 500 mg four times a day between meals) is a proteolytic enzyme that has anti-inflammatory effects. All three when taken together as a "cocktail" can be helpful, but it is not 100%.
According to Joseph Conlon, technical advisor at the American Mosquito Control Association, ingested vitamin B-12 alone has not been shown to have any repellent effect on mosquitoes in controlled studies. Garlic has also failed to pass muster in this regard. However, the Association offers excellent information on ways to repel mosquitoes:
www.mosquito.org/mosquito.html
et j'ai trouve un autre site en anglais, idem, ils sont sceptiques :
From: Jon Mitchell <mug.
perth.otago.ac.nz>
> I'm also told that if you take Vitamin B2 it will help to repel them.
I haven't used v-B12 myself but I have seen numerous others who have. Guiding in New Zealand's Fiordland (where "sand flies" have been known to carry off sheep) I met plenty of US hikers who had been mega-dosing on B12 for months before their trip. There seemed to be absolutely zero difference between the number and severity of bites between those who had used B12 and those who hadn't.
Probably of no use what so ever - just another observation from downunder.
et aussi :
From: pete.mudhead.uottawa.ca (Pete Hickey)
>I'm also told that if you take Vitamin B2 it will help to repel them.
>Can anyone confirm this to be true?
I had heard the same thing. I wasn't too sure about the number, though, B2, B12, whatever, so I took some B--complex which had all of them. I went for a day, and, sure enough, I didn't get many bites at all.
Then I thought, maybe this was just a light bug year. So the next day, I didn't take the B*, and guess what? I didn't get many bites either.
But then I thought that maybe that day was a supre light bug day. I had no *real* control. I devised an experiment.
I broke the vitamins in half, and swallowed them on my left side while lying on my left side, to make sure they stayed on the left. I stayed like that for a while to make sure the vitamins went to the left, and not the right.
Guess what? I didn't get any fewer bites on either side.
Conclusion: For me, the vitamins did nothing other than making me piss bright yellow.
pete
P.S. the bright yellow piss *was* effective for killing bugs when aimed at them.
Et ca marche! Mais tu dois en prendre assez bien.
Bonjour