For people specifically targeting loose skin from weight loss, I lean toward the 2 mg daily end of the dosage range rather than 1 mg
However, Vitamin B12 in general helps maintain good health and has been shown to be beneficial in helpng to also: reduce stress, increase energy, improve memory, mood and cardiovascular health, and to promote weight loss
Everything else is contamination and contamination changes your results
Better vascularization means more nutrients, more oxygen, and healthier hair
N-terminal hexanoyl and C-terminal modifications create more stable, lipophilic molecule
NAD + also plays a critical role in other aspects of mitochondrial function, which must be maintained to ensure cellular health through several dynamic and coordinated homeostatic pathways