Seek immediate medical attention if you experience severe persistent abdominal pain (especially if radiating to your back), persistent vomiting, inability to keep fluids down, dark urine, dizziness, fainting, fever, or yellowing of the skin or eyes
Also, many athletes use this supplement to burn fat, build muscle, and prevent bruising and muscle fatigue
High-dose oral B12 utilizes passive diffusion (about 12% of dose) even without intrinsic factor, making it effective for many malabsorption conditions
For research purposes, the copper-chelated form is typically used, as it represents the biologically active species
L-carnitine is a naturally occurring compound derived from the amino acids lysine and methionine
Faerch K, Torekov SS, Vistisen D, Johansen NB, Witte DR, Jonsson A, et al