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For vial-based microdosing, concentration matters more than vial size
Improved Mental Clarity Adequate B12 levels support brain function, helping with focus, concentration, and reducing brain fog. 3
While it seems intuitive to massage the area, rubbing can increase bruising and irritation
Another small, randomized, double-blind trial in 93 individuals with low vitamin D status found no additional benefit of B-vitamin supplementation (50 mg/day of vitamin B6, 0.5 mg/day of folic acid, and 0.5 mg/day of vitamin B 12 ) on markers of bone health over a one-year period beyond that associated with vitamin D and calcium supplementation
If you are nutrient deficient when breastfeeding, you milk might also be missing nutrients, or milk supply can decrease