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Though uncommon, vitamin B12 may sting a little on injection, though this is usually a short-lived side effect

While this provides body composition benefits including fat loss and muscle growth, it also affects glucose metabolism (often elevating blood sugar), increases IGF-1 (with implications for cell proliferation), and costs significantly more than AOD-9604

After all, completely eliminating Methionine from a human diet would be nearly impossible (Methionine is found in meat, fish, and dairy)

Vitamin B12 Hevert forte Inject Ampoules for vitamin B12 deficiencies

Niacinamide 5% - Strengthens the skin barrier, reduces redness and pigmentation, and improves elasticity

A full blood count and serum B12 measurement are straightforward investigations that can help differentiate causes