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Non-deficient people report a lift in energy after taking B12 injections, but theres not much scientific evidence that this actually works, says Miller

PHYSIOLOGICAL RESEARCH, Volume 73, pages 515-527

Grain products and nuts are considered good sources, while animal products, fruit, and many vegetables are generally low in molybdenum (2)

A common pattern is a Myers Cocktail (which already has B12) once or twice a month, plus a quick standalone B12 shot in between if energy dips during a heavy stretch

For example, a 2020 study found: Genetic predisposition to elevated serum IGF-1 levels was associated with higher risk of type 2 diabetes and coronary artery disease. The researchers note: Abnormal serum IGF-1 levels are associated with an increased risk of type 2 diabetes and cardiovascular diseasethe role of IGF-1 levels within the normal range in cardiometabolic disease remains unclear. 4