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Description
The Relationship Between Vitamin B12 Deficiency and Skin Colour Problems Among all the effects that Vitamin B12 deficiency causes in the skin, the first is hyperpigmentation
The brain is so complex, and it's nice to see a company say "let's wait for real proof" instead of hyping things up

Giustina A, Veldhuis JD
Hasan, Q., Tan, S
