I agree with others that best policy is to shave bold or very short. I do #1, because i find it most convenient.

If you really want to check the product it is best to go to product website (they usually promote and sell). Read their legal statements. Most of them will point there that product makes no claims of medical use, it is just a supplement, it is not FDA approved. It is for entertainment purposes only.

The legal small print on the website itself will tell you if you should buy or not. It protects website from liability and they gamble that most people don’t read it.

You will spend less time going through legal statements than looking for “other people’s unbiased opinion“ on internet. The latter may not even exist as products can be rebranded every 6 months.