There's no established upper limit for B12, and toxicity is extremely rare
Only a medical professional can conclusively determine if you have a vitamin B12 deficiency
This helps visualize why they are studied for different, yet potentially complementary, purposes
Cognitive Health Some antioxidant like Glutathione plays a crucial role to detox the brain from oxidative damage and prevent from some cognitive disease including Parkinsons , Alzheimers conditions, anxiety, and other brain-related diseases
But on April 7, when the study came out, much of the media unfortunately went overboard
Blue Copper Peptide (GHK-Cu): The core active that promotes micro-repair and stabilizes the skin base