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This does not mean it's safe to buy and use

A clinical trial found that thymosin beta 4 applied topically helped to accelerate wound healing.[ref] Other studies show that it accelerates wound healing by up to a month faster than without TB4.[ref] Dry eyes: Eye drops containing thymosin beta 4 were trialed in a multicenter, randomized, double-masked, placebo-controlled 56-day phase 2 clinical trial including a 28-day follow-up at 2 US sites

B12 isnt naturally in plant-based foods, but fortified foods like cereals, nutritional yeast, and plant milks contain B12

As a drug class, peptides are about as far from fringe as it gets