It blocks an enzyme called NNMT, which consumes nicotinamide, a building block cells use to make NAD+
1 Alcohol reduces vitamin B12 levels While there are a number of studies linking alcoholism to severe B vitamin deficiency, the Journal Nature published a study in 2004 that looked at the impact of moderate alcohol intake on B12 levels in post-menopausal women
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Fleckenstein M, Keenan TDL, Guymer RH, Chakravarthy U, Schmitz-Valckenberg S, Klaver CC, Wong WT, Chew EY
Symptoms of Vitamin B-12 Deficiency Fatigue and Weakness Low Moods Low Concentration Level Loss of Appetite Constipation Poor Memory Foods Rich in Vitamin B-12 Beef and chicken liver Wild-caught fish such as salmon, trout, and tuna Grass-fed beef and lamb Pasture-raised poultry Organic dairy products like milk and yogurt Who Is Most Likely to Have a Vitamin B-12 Deficiency