can vitamin b12 injections have side effects Shots: B12 Benefits, Uses, Risks Vitamin B12: Overdose and Side
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Its often more comfortable and works better for some people

A deficiency in biotin is very rare, but when it occurs, brittle, thinning, or splitting hair and nails are some of the most noticeable symptoms

Systemic Reactions : Although rare, some individuals may experience more widespread symptoms such as fatigue, headaches, or gastrointestinal issues

Effect of Choline Supplementation on Rapid Weight Loss and Biochemical Variables Among Female Taekwondo and Judo Athletes

Persons taking most antibiotics, methotrexate and pyrimethamine invalidate folic acid and vitamin B 12diagnostic blood assays