Avoid mixing copper peptides with strong, lowpH actives like highstrength vitamin C (ascorbic acid), aggressive AHAs/BHAs (glycolic, lactic, salicylic acid), and potent retinoids in the same step, as they can destabilize peptides or increase irritation
Specific contraindications include: A personal or family history of Medullary Thyroid Carcinoma (MTC)
By starting with small doses and gradually increasing them over time, drinking plenty of water both before and after the shots, and getting adequate rest, you can reduce or even eliminate any negative reactions you may experience from taking a B12 injection
For fatty liver concerns, consult your GP if you experience persistent fatigue, right upper abdominal discomfort, unexplained weight loss, jaundice, or if you have metabolic risk factors requiring assessment
(2024) PLoS One, 19: e0305994