Hi Shaky,
No it doesnt state that on the bottle, however loads of people use it to avoid getting bitten, it doesnt work for many either!
There are numerous posts on here and Trip Advisor with Pro and Con views. It works for me but.......I take prescription antihistamines aprox' 6 weeks before travelling, use Mozzie repellant during the day and night and on occasion, rub lemon/lime juice on exposed areas depending on how bad the situation is ( good ole West Indian tip which has been passed down generations

)
Julie