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is b12 injected into meat Vitamin Foods: List and Benefits Vitamin B12 deficiency: causes, symptoms
Description
Sometimes seaweed and algae is touted as a vegan B12 alternative, but unfortunately it is not well absorbed in the body

Fatigue is usually the first red flag
Additionally, because NAD+ supports metabolic pathways, some practitioners recommend taking a methyl donor supplement (such as TMG, trimethylglycine) concurrently, to aid in processing any excess nicotinamide produced

96Feagan BG, Sandborn WJ, Gasink C, et al

Vitamin B12 Vitamin B12 is an essential nutrient commonly known to serve many essential functions including energy production, supporting nerve cells, brain health and red blood cell formation

The high blood level isn't what's causing the symptoms
