Vitamin B12 is a water-soluble vitamin required for red blood cell production, DNA synthesis, and neurologic function
Furthermore, it has been shown in mice that MOTS-c treatment improves physical performance in mice of all ages and seems to regulate skeletal muscle metabolism and gene expression 1
But they come with significant drawbacks: high cost, injection site reactions, increased infection risk due to immune suppression, and the development of anti-drug antibodies over time that can reduce efficacy
Keep in mind that once the vial is opened, sterile water cannot be stored after that, as it must be used immediately
It also supports healthy aging by boosting collagen production, leading to better skin elasticity and reduced wrinkles
Topical or intravenous forms are more commonly used and may offer better results for skin whitening