GLP-1s Dramatically Linked to Deficiency Risk for This Essential Nutrient
Why Vitamin B12 Matters
Vitamin B12 plays a role in making red blood cells, creating DNA and maintaining a healthy nervous system. Most adults are advised to consume 2.4 micrograms daily, a need that remains even when calorie intake falls.
Low B12 can cause fatigue and weakness. Dr. Chung says more serious effects may include anemia, numbness or tingling in the hands and feet, and difficulty with balance or memory. Prolonged deficiency can risk permanent nerve damage.
How GLP-1s May Affect Intake
Taking a GLP-1 does not automatically lead to vitamin B12 deficiency. The possible connection is indirect: reduced appetite and feeling satisfied sooner can make it more difficult to eat enough nutrient-rich food. Nausea, vomiting, diarrhea and constipation are common side effects that may also contribute to inadequate vitamin intake, including B12.
Food, Supplements And Testing
Dr. Chung recommends speaking with the physician who prescribed the medication about any changes in how you feel. The physician may suggest blood tests to check B12 levels.
Oral supplements in capsule, tablet or liquid form are often the first option. Dr. Chung says a common daily dose is 1,000 micrograms because the body absorbs only part of a supplement. B12 injections are another option, but Dr. Worley says they are usually reserved for people with absorption problems or more significant deficiencies.
Key points
- Most adults are advised to get 2.4 micrograms of vitamin B12 daily.
- GLP-1 medications do not automatically cause B12 deficiency, but reduced intake and side effects may contribute.
- A physician may recommend blood tests when symptoms or concerns arise.
- Oral supplements are often used first; injections are generally reserved for more significant cases.