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If you don't mind getting injections, have nutrient absorption issues, and are willing to make the trip to the doctor's office, then B12 injections may be the best option for you

This population might benefit most from injections if dietary improvements dont do enough to raise levels

Colchicine, para-aminosalicylic acid, and heavy alcohol intake for longer than 2 weeks may produce malabsorption of vitamin B12

Best GHK-Cu percentage is not "more is better"

For combination research bridging the adipose-NNMT angle with broader NAD+ biology, see NAD+ 500mg , NAD+ 1000mg , and the conceptual framework in NAD+ and Sirtuins