The effects of T 4 in vivo are mediated via T 3 (T 4 is converted to T 3 in target tissues)
Anti wrinkle injections are not appropriate during pregnancy or breastfeeding, in patients with neuromuscular conditions (myasthenia gravis, Lambert-Eaton syndrome, motor neurone disease), patients on aminoglycoside antibiotics, those with active infection at the injection site, or those with known hypersensitivity to botulinum toxin
Most importantly for bodybuilders and other strength athletes, L-Carnitine enhances mitochondrial function, fat burning, and energy production
Because the vasodilatory response to niacin may be more dramatic at the initiation of treatment, activities requiring mental alertness (e.g., driving or operating machinery) should not be undertaken until the response to niacin is known