Labs · Nutrition
B12 deficiency in menopause
B12 absorption declines with age. Serum B12 < 400 warrants MMA testing.
Written by the Kindr Health Editorial & Clinical TeamMedically reviewed by Kindr Health Clinical Team NPI 1609792902Published Last reviewed
Key points
- Check MMA if borderline
- Methyl-B12 preferred
- Recheck at 3 months
Frequently asked questions
Serum B12 normal but symptomatic?
Order MMA and homocysteine.
Best form?
Methylcobalamin sublingual or injection.
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Written and medically reviewed by the Kindr Health Clinical Team · Published 2026-06-19 · Last reviewed 2026-07-01. Compounded medications are prepared by FDA-registered 503A pharmacies and are not FDA-approved drug products.