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D., Clausen, T

It helps soothe irritated skin, reduces redness, and evens out skin tone

Yau WW, Singh BK, Lesmana R, Zhou J, Sinha RA, Wong KA, Wu Y, Bay BH, Sugii S, Sun L, et al

For those truly low on B12, getting injectable B12 for humans can be transformative

Vitamin B12 is essential for healthy blood and is not a prohibited substance, so can be used by any competition animal before and after an event
