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Dear Bill, to answer your question about Vitamin B1....
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Vitamin B1 (thiamine hydrochloride) has a folklore reputation as an insect repellent. The idea is that if you take a daily vitamin B1 supplement your skin will excrete the excess vitamin and the smell of this will repel mosquitoes. There are even products marketed for this purpose, such as MOZI FREE, an oral liquid vitamin B1 supplement. Eating garlic or brewer’s yeast is also thought by some to give protection against mosquitoes. The only problem is that there’s no hard evidence to back up such claims. In fact there are no orally administered products proven to have any insect-repelling qualities. Folk remedies are sometimes founded on practical truths, but these seem to be just myths. http://www.choice.com.au/viewArticleAsOnePage.aspx?id=105015
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NEJM -- Comparative Efficacy of Insect Repellents against Mosquito ... http://content.nejm.org/cgi/content/full/347/1/13
Vitamin B1 is not a systemic mosquito repellent in man.
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Prevention against mosquitos - Thorn Tree Forum - Lonely Planet http://thorntree.lonelyplanet.com/messagepost.cfm?postaction=reply&catid=29&threadid=519239&messid=5588053&showall=true
quote: "vitamin B1 does not have a systemic effect against mosquitoes
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Is there any evidence in using thiamine (vitamin B1) in malaria ... http://www.attract.wales.nhs.uk/question_answers.cfm?question_id=982
We found two articles in which the author concludes "Although completely ineffective against mosquitoes, systemic vitamin B1, acoustic devices and so-called ...
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Alternative Insect Repellents that Do Not Work http://infectiousdiseases.about.com/od/prevention/qt/altern_repel.htm
Vitamin B1; Garlic; Brewer's yeast (that contains several B vitamins) ... Yellow Book: Protection Against Mosquitoes and Other Arthropods. ...
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CHAPTER 23 THE BEST CONTROL FOR MOSQUITOES http://www.safesolutionsinc.com/23_-_Mosquitoes.pdf
Try mixing some vitamin B1 in Vaseline and cover the skin lightly. ... F.R. Morrson in Australia found the most effective repellent oils against mosquitoes, ...
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I have read a lot of data that proves that even massive doses of vitamin B1 does not work but, even I suggest you might "try it" in Chapter 23. The problem is if you sell someone a mosquito control product that does not protect the public and they get a mosquito borne disease - you might very well be sued. I have an EPA exempt insect repellant that was and is being successfully used in Iraq and now in Africa by our troops and by many people in the USA - this roll-on formula does not contain any Vitamin B1.
The main reason that I would not sell this product is very simple - to do so would be illegal. Vitamin B1 is currently not registered for use as a pesticide nor is it currently on the EPA exempted ingredient list (see Chapter 11 at http://www.thebestcontrol2.com ).
You can legally (only if you are recognized as an IPM expert) suggest that an unregistered alternative can be used to control pests - but, only if you do not making pesticidal claims about your own product.
All the best, Steve
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