Mane and Tail to me has always seemed like a good basic sulfate shampoo. Nothing strikes me about it. And of course sulfates aren't evil, they just don't suit everyone, but that's how it is with nearly everything. If your hair and especially scalp is okay with sulfates, then by all means, use them!
Differences between vitamin E and biotin? Well, biotin is a B vitamin.I've used vitamin E topically on my scalp for hair growth. I didn't notice any difference with and without it, because it's the scalp massage that does the most in terms of hair growth.
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