The cheap bottle that makes 'biotin shampoo' pointless. Biotin works when you swallow it, not when you rub it on your scalp, so skip the fancy shampoos and take the pill instead.
I learned this in a science class and was kind of annoyed, all those expensive shampoos with biotin and vitamin E are mostly marketing. Biotin has to be absorbed to do anything, and your body takes it in far better when you swallow it than when you rub it on your head.
So instead of the pricey bottles, just take a biotin pill like Nature's Bounty and buy whatever cheap shampoo you like. Same result for a fraction of the money.
Not really, biotin needs to be absorbed, which happens when you swallow it, not when you rub it on your scalp.
Follow the label, most people don't need megadoses, and consistency matters more.
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