Past issues with your pancreas (pancreatitis) or kidneys
Endogenous antioxidants Catalase Glutathione Glutathione peroxidase Superoxide dismutase (SOD) CoQ10 (endogenous and exogenous) Exogenous antioxidants Carotenoids Polyphenols Probiotics Selenium Vitamin C and E Zinc Sources of different types of nutritional antioxidants The role of nutritional antioxidants in Adrenal hormone function Hypothalamic-Pituitary-Adrenal (HPA) axis and role of selenium and ascorbic acid supplements Health benefits of probiotics and their effects on brain, gut, and microbiome (BGM) axis modulating of HPA axis and cortisol release The BGM axis network of routes that facilitate the exchange of information and signals encompasses neuronal elements (vagus nerve, neurotransmitters, and enteric nervous system), the HPA axis, and stress hormones like cortisol

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
The TikTok Shop listing describes the substance as a Muscle Growth Supplement. Another shop, Bionexus Technologies, sells products labeled as semaglutide and tirzepatide (otherwise known as Mounjaro, a popular weight loss drug similar to Ozempic)