Allergies to vitamin B12 are extremely rarerarer than common allergies like bee stings, peanut butter, or shellfish
In 2017, the American Society of Anesthesiologists (ASA) published fasting guidelines for elective procedures, recommending minimum fasting periods of 6 h for solids and 2 h for clear liquids [7]
If we spread the cost of the product over the life of the product, which is much longer, it means making money
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It increases endorphins and endocannabinoids which give an immediate mood lift (like the runners high)
The honest conclusion is narrower: GHK-Cu is scientifically interesting and reasonable to investigate as a topical cosmetic scalp ingredient, while human hair-regrowth claims for individual products require stronger evidence