Health

Welcome to the NextFitLife Health library — evidence-based articles on vision care, sleep, preventive wellness, healthy aging, and the lifestyle habits that protect your health for life.

Every article is written by Adel Galal, a health and wellness writer with over 30 years of personal study and practice. Content is grounded in peer-reviewed research and cites high-authority sources, including the National Eye Institute, the American Academy of Ophthalmology, and the World Health Organization.

Topics covered include eye health, dry eye syndrome, macular degeneration, glaucoma, cataracts, sleep and vision, hydration, UV protection, and comprehensive guides for every stage of adult life. All content is for educational purposes only and does not substitute for professional medical advice.

vitamin B12 deficiency and cancer- Adult reviewing vitamin B12, complete blood count, methylmalonic acid, and intrinsic-factor test results with a healthcare professional.

Vitamin B12 Deficiency and Cancer: What It Can and Cannot Tell You

Published:Sep 25, 2025 Last Updated: July 25, 2026 Next Review: July 2027, or earlier if important vitamin B12, autoimmune gastritis, pernicious anemia, cancer-risk, testing, or treatment guidance changes Written and Source Checked by: Adel Galal, Founder and Lead Writer at NextFitLife Review Status: Editorially reviewed against current NIH, NICE, NIDDK, National Cancer Institute, MedlinePlus, and

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