Autoimmune digestive diseases Crohns disease can affect the absorption of B12, since the ileum is often affected, according to British researchers (10)
For most people taking B12 at standard supplemental doses as part of a well-formulated multivitamin, this isn't a concern
While singly-housed animals may experience stress that impacts metabolism, body weight, and adiposity 65,66,67,68,69 , the singly-housed animals in this study were treated identically (to the best of the experimenters ability) to minimize and equalize stress across all animals and reduce confounding variables
Key findings include a 70% increase in skin thickness after 12 days of topical application, wrinkle volume reduction of 55.8% and depth reduction of 32.8% in clinical studies, and accelerated wound healing across multiple models (Pickart et al., 2018)
While urea cycle disorders are often caused by genetic diseases, deficiencies of arginine or ornithine triggered by conditions such as illness or stress can cause increases in blood ammonia levels