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Some health issues can change how much B12 is needed
many clinics use short weekly blocks then maintenance, set by a healthcare provider after a review
10.1186/2045-8118-10-2 Fluids Barriers CNS 45 LiuW
10.1002/jbt.23826 179 XunW.ShiL.CaoT.ZhaoC.YuP.WangD.et al (2015)
The disease-burden mismatch behind these numbers is well documented by the American Cancer Society: Black men have a 67% higher prostate cancer incidence rate than White men but are more than twice as likely to die of the disease ( [72] ), and Black women have a 38% higher likelihood of dying from breast cancer despite a 5% lower likelihood of diagnosis ( [73] )
