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These studies are not designed, documented, or archived according to FDA clinical research standards

Furthermore, research on circadian biology suggests NAD+ is tied to the body clock, so morning supplementation might be optimal for metabolic syncing
Some protocols might also use intramuscular injections (into muscle), though subcutaneous is more common due to better tolerability

A 2015 study published in Seminars in Thrombosis and Hemostasis has found that taking omega-3 fatty acids may decrease thrombotic potential in patients with cardiovascular disease ( 39 )

Small injuries linger for months

Because athletes have a much higher physiological need for vitamin B12 and other micronutrients, symptoms can be felt well before a true deficiency occurs
