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A deficiency of vitamin B12 can also cause shortness of breath or heart palpitations, as well as gastrointestinal symptoms including constipation, diarrhea, appetite loss, or gas

GHK-Cu is not FDA-approved for anti-aging or cosmetic purposes

2022 Feb 5;14(1):23

It has been studied extensively for its potential influence on molecular signaling, structural remodeling, and angiogenic processes

Vitamin B12 comes in several forms: Cyanocobalamin Adenosylcobalamin Methylcobalamin The natural forms of B12, that are identical to the forms found in our bodies and food, are adenosylcobalamin and methylcobalamin, and these are the active forms

Rabbits were anesthetized for these measurements, using the same protocol as for wound creation