• Weil Nutrition Corner
  • Meet Dr. Weil
  • Origins
  • Healthy Aging
  • Marketplace
  • Podcasts
  • Accessibility
  • Subscribe
Dr. Weil Logo Dr. Weil Logo Weil™ Andrew Weil, M.D.
  • Health & Wellness
    Health & Wellness
    Body, Mind & Spirit
    • Addiction
    • Allergy & Asthma
    • Autoimmune Disorders
    • Back Pain
    • Bone & Joint
    • Cancer
    • Colds & Flu
    • Dental & Oral
    • Diabetes
    • Disease & Disorders
    • Ears, Nose, & Throat
    • Feet
    • Gastrointestinal
    • Hair, Skin, & Nails
    • Headache
    • Heart
    • Insects & Parasites
    • Liver & Kidney
    • Mental Health
    • Pregnancy & Fertility
    • Respiratory
    • Sexual Health
    • Sleep Issues
    • Stress & Anxiety
    • Vision
    Balanced Living
    • Exercise & Fitness
    • Gardening
    • Healthy Home
    • Healthy Living
    • Meditation & Inspiration
    • Meet Dr. Weil
    • Pets & Pet Care
    • Technology
    • Wellness Therapies
    Health Centers
    • Aging Gracefully
    • Children
    • Condition Care Guide
    • Men
    • Women
  • Diet & Nutrition
    Diet & Nutrition
    Anti-Inflammatory Diet & Pyramid
    Cooking & Cookware
    Diets & Weight Loss
    Food Safety
    Nutrition
    Recipes
  • Vitamins, Supplements & Herbs
    Vitamins, Supplements & Herbs
    Herbs
    Supplements & Remedies
    Vitamins
  • Ask Dr. Weil
  • Blogs
    Blogs
    Bulletins
    Health Tips
    Spontaneous Happiness
  • Mushrooms
  • Sleep
Press "Enter" to search
Dr. Weil Logo Weil™ Andrew Weil, M.D.
  • Health & Wellness
    Health & Wellness
    Body, Mind & Spirit
    • Addiction
    • Allergy & Asthma
    • Autoimmune Disorders
    • Back Pain
    • Bone & Joint
    • Cancer
    • Colds & Flu
    • Dental & Oral
    • Diabetes
    • Disease & Disorders
    • Ears, Nose, & Throat
    • Feet
    • Gastrointestinal
    • Hair, Skin, & Nails
    • Headache
    • Heart
    • Insects & Parasites
    • Liver & Kidney
    • Mental Health
    • Pregnancy & Fertility
    • Respiratory
    • Sexual Health
    • Sleep Issues
    • Stress & Anxiety
    • Vision
    Balanced Living
    • Exercise & Fitness
    • Gardening
    • Healthy Home
    • Healthy Living
    • Meditation & Inspiration
    • Meet Dr. Weil
    • Pets & Pet Care
    • Technology
    • Wellness Therapies
    Health Centers
    • Aging Gracefully
    • Children
    • Condition Care Guide
    • Men
    • Women
  • Diet & Nutrition
    Diet & Nutrition
    Anti-Inflammatory Diet & Pyramid
    Cooking & Cookware
    Diets & Weight Loss
    Food Safety
    Nutrition
    Recipes
  • Vitamins, Supplements & Herbs
    Vitamins, Supplements & Herbs
    Herbs
    Supplements & Remedies
    Vitamins
  • Ask Dr. Weil
  • Blogs
    Blogs
    Bulletins
    Health Tips
    Spontaneous Happiness
  • Mushrooms
  • Sleep
  • Weil Nutrition Corner
  • Meet Dr. Weil
  • Origins
  • Healthy Aging
  • Marketplace
  • Podcasts
  • Accessibility
  1. Home
  2. Blog
  3. Health Tips

4 Things A Vitamin B12 Deficiency Can Lead To

4 Things A Vitamin B12 Deficiency Can Lead To
1 min

B vitamins help support adrenal function, help calm and maintain a healthy nervous system, and are all necessary for key metabolic processes. Vitamin B12, also known as cyanocobalamin, is necessary for DNA synthesis and affects the development of red blood cells, normal myelination (insulation) of nerve cells, and the production of neurotransmitters which are essential to the nerves’ messaging system including an impact on supporting mental health and mood.

Deficiencies of B12 can lead to:

  1. Memory loss
  2. Confusion
  3. Fatigue
  4. Dementia

Know that commonly used medications like the diabetes drug metformin, birth control pills and acid suppressing meds can deplete the body of B12, promoting these concerning side effects. If you are on these medications, work with your provider to monitor blood levels or consider supplementation.

Animal-derived foods, including dairy, eggs, meat, fish and poultry are the only food sources of B12, so this important vitamin is often deficient in vegan diets. Those with weaker digestive health may be at risk as well. Good sources are clams, herring, cooked oysters and wild Alaskan salmon.

These recipes feature foods that provide B12:

  • Clam Chowder
  • Salmon Teriyaki

To help meet daily needs, Dr. Weil recommends a B-complex supplement that contains a full spectrum of B vitamins, including thiamine, B12, riboflavin and niacin. Be aware though that so often a B complex provides only a moderate amount of B12, and an additional supplement may be necessary. It is always a good idea to have your provider monitor vitamin B12 levels in blood to ensure you are getting enough, particularly if you are on any of the medications listed above.

Today’s Health Topics

Editor's Pick

  • Essential Oils: Lemon Balm Oil

Health Focus

  • Meditation & Your Heart

Ask Dr. Weil's Q&A

  • Does Irregular Sleep Harm Health?
sponsor
Visit Our Origins Shop!
Dr. Weil believes inflammation is the root cause of visible skin concerns like irritation. He also believes mushrooms have the power to fight irritation. That's why he partnered with Origins to create these Mega-Mushroom Formulas.
 
Advertisement
Related Weil Products

Dr. Weil On Healthy Aging - Your Online Guide To The Anti-Inflammatory Diet!

Everything you need to get started eating a healthful, satisfying diet is here - including eating and shopping guides, over 300 recipes, and an exclusive version of Dr. Weil's Anti-Inflammatory Food Pyramid! Start your 14-day free trial now - and start eating anti-inflammatory today!
Get Started
Dr. Weil on Healthy Aging

Start Your 14-Day Free Trial

Free Newsletters

Stay Connected With Dr. Weil

Anti-Inflammatory Diet

Follow Dr. Weil’s Food Pyramid

Get Dr Weils Newsletter Updates

Exclusive Lifestyle, Nutrition & Health Advice

Dr. Weil's FREE health living advice delivered to you!

By clicking "Subscribe," you agree to the DrWeil.com Terms and Conditions and Privacy Policy. You also agree to receive emails from DrWeil.com, and you may opt out of DrWeil.com subscriptions at any time.

Trending Now

Should You Detoxify With A Magnesium Bath? | Andrew Weil, M.D.
Health Tips

Should You Detoxify WithA Magnesium Bath?

Craving Sweets? Try These Dr. Weil-Approved Healthy Choices
Health Tips

Craving Sweets? Try These Dr. Weil-Approved Healthy Choices

Dr. Weil’s 4 Favorite Anti-Inflammatory Foods To Add To Your Diet!
Health Tips

Dr. Weil’s 4 Favorite Anti-Inflammatory Foods

Can A Clean Diet Help Promote Weight Loss? | Andrew Weil, M.D.
Health Tips

Can A Clean Diet Help Promote Weight Loss?

Dr. Weil Logo Weil™ Andrew Weil, M.D.
Dr. Weil's Signature

Exclusive Lifestyle, Nutrition & Health Advice

  • About Us
  • Press Information
  • Advertising
  • Contact Us
  • Terms of Use
  • Privacy Policy
  • Accessibility

Terms of Use | Privacy Policy

Information on this website is provided for informational purposes only and is not intended as a substitute for the advice provided by your physician or other healthcare professional. You should not use the information on this website for diagnosing or treating a health problem or disease, or prescribing any medication or other treatment. Any third party offering or advertising on this website does not constitute an endorsement by Andrew Weil, M.D. or Healthy Lifestyle Brands.

© Copyright 2025 Healthy Lifestyle Brands, LLC. All rights reserved. Reproduction in whole or in part without permission is prohibited. www.drweil.com