Not typically
Ametov AS, Barinov A, Dyck PJ, et al
By delivering the vitamin directly into the bloodstream, injections provide a reliable and effective way to restore levels when tablets are not sufficient. Many people develop low vitamin B12 levels gradually
Even the average 5Ker, avid gardener, or weekend warrior can benefit from this secret weapon. A small study of eight men receiving 1,000 mg of glutathione before exercise, those men taking the glutathione performed better, felt less fatigued, and had lower blood lactic acid levels than the placebo-controlled group.19 This is key, as increased lactic acid in the body can result in fatigue, low blood pressure, muscle aches, a drop in body temperature, and respiratory problems
Public Health 12 , 90369045 (2015)