symptoms worse after b12 injections do have side effects Feeling B12 Injection: Answering concerns B12 Shots at Home: How,

Distinguishing idiopathic skeletal muscle cramps from spasticity, dystonia, or neuromuscular disease is important because treatments differ (Bordoni et al., 2023)

Do not exceed the recommended daily dose/amount

J., Ayalon-Dangur, I., Ayalon-Dangur, R., Naamany, E., Gafter-Gvili, A., Koren, G., & Shiber, S

Vitamin B12 is an important water-soluble vitamin that plays a central role in several aspects of health, including brain function, heart health, and the production of red blood cells and DNA

Additionally, a randomized, double-blind, placebo-controlled trial in 2,588 healthy older adults with mild hyperhomocysteinemia found that daily supplementation with 500 g of vitamin B 12 and 400 g of folic acid for two years reduced blood homocysteine concentrations but had no benefit on depressive symptoms in those with or without depressive symptoms at baseline (110)