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Gastric acid releases vitamin B12 from the food that you consume, which becomes a problem for some older adults because they produce less stomach acid as they age, thereby increasing their risk for B12 deficiencies
Quick Reference: Standard Protocol Self-reported starting doses begin around 0.25 mg 3x weekly for 2-4 weeks to assess tolerance, before increasing to 0.5 mg 3x weekly
Kim et al, 2009)
doi:10.1016/S2213-8587(22)00243-1
This means reduced fatigue during your workouts and increased endurance for those extra reps
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