One 2021 review study in the Journal of Personalized Medicine found that, in individuals with autism spectrum and CFD, side effects of leucovorin were generally mild, but in some cases included aggression, agitation, headaches, insomnia and increased tantrums
However, the vitamin can promote the formation of keratinised cells on the surface of the skin and thus impede drainage from the sebaceous glands Vitamin B7 (biotin) is regarded as the beauty vitamin because it is particularly important for the maintenance of skin, hair and nails Folic acid (vitamin B9) is needed by the skin for cell division and supports various metabolic functions
If your B12 levels are in the intermediate range, your doctor may order other tests that are more sensitive predictors of deficiency than your serum level of the vitamin
Using medication slightly past expiration is probably safe but may be less effective due to degradation
Various supplementation options are available, including standard oral tablets and intramuscular injections for those with absorption difficulties