All figures reflect the published literature and clinical observation as of July 2026, and human data remains limited
77 KamkarH.TayebiS.KhanghahiS.KamkarM.BaghaeeA.AlipourM.et al (2022)
However, unfortunately, vitamin B12 deficiency is somewhat common, especially in the elderly, strict vegans, and people on antacid medications, so I dont mean to downplay the importance of vitamin B12 or the B vitamins more generally
Summary: Beef liver contains approximately 6080 micrograms of vitamin B12 per 100 grams, making it one of the most concentrated dietary sources available
You may be wondering how much vitamin B12 a person over 65 should take
However, it is generally used in cycled protocols (e.g., 8-16 weeks) rather than continuous long-term therapy