These may include: ( 4 ) Fatigue or lack of energy Brain fog or trouble concentrating Irritability or mood swings Pale skin or shortness of breath Tingling in the hands and feet Difficulty walking or staggering Anemia Swollen or inflamed tongue A B12 deficiency in men may also contribute to low testosterone, weight gain, and poor exercise recoverymaking it a hidden factor in many mens health concerns
PubMed: 17332148 AOD 9604 Versus Placebo in Obese Adults: A 52-Week Randomized, Double-Blind Extension Study human rct Hefti FF, Hefti F, Lichtensteiger W, et al
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Unlike vitamin A, which can help hair growth if taken in sufficient amounts but can also lead to hair loss if taken in excessive amounts, vitamin B12 does not make your hair fall out, even if taken past the recommended levels
B12 injections help strengthen bones, especially if you're at risk for osteoporosis
Cancer Strong evidence shows higher NNMT in all gastric cancers, plus pancreatic, kidney, and bladder types