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Vitamin B12 deficiency affects approximately 6% of people under 60 and up to 20% of those over 60 in the U.S., according to the National Institutes of Health (NIH)

Lactation is accompanied by a 40% increase in serum B12 at 6 weeks post-partum, remaining at this elevated level while the mother is lactating

Vitamin D and Vitamin B12, when combined, offer enhanced health benefits that address a range of physical and mental well-being needs

Therefore, reliable assessment of their serum concentration is only possible after acute inflammatory processes have normalized and are thus not meaningful in the first few postoperative weeks