Magnesium

Magnesium and Lyme disease: what to know

Magnesium is an essential mineral involved in nerve signaling, muscle function, energy production, and bone health. However, magnesium supplements are not an established treatment for Lyme disease and should not replace prescribed antibiotics or medical evaluation.

This hub explains magnesium’s nutritional role, when supplementation may be appropriate, and the safety questions to discuss with a healthcare professional.

Can magnesium help with symptoms?

Correcting a magnesium deficiency can help address problems caused by that deficiency. That is different from demonstrating that magnesium improves symptoms caused by Lyme disease.

Fatigue, weakness, and muscle symptoms can have many causes. Their presence does not establish magnesium deficiency or show that a supplement will help. Persistent or worsening symptoms deserve an evaluation rather than an assumption about their cause.

Evidence for a supplement in another condition should not be treated as proof of benefit for Lyme-related symptoms.

Food sources and when supplements may be considered

Magnesium is found in foods such as beans, nuts, seeds, whole grains, and leafy green vegetables. A healthcare professional may consider supplementation when dietary intake is inadequate or a medical condition affects magnesium balance.

There is no established magnesium supplement dose for treating Lyme disease. The appropriate amount, if any, depends on nutritional needs, kidney function, medications, and the reason for taking it.

Safety and medication interactions

Supplemental magnesium can cause diarrhea, nausea, and abdominal cramping. Very high amounts can cause serious toxicity. People with impaired kidney function may have greater difficulty removing excess magnesium.

Magnesium can reduce the absorption of certain medicines, including doxycycline and some other antibiotics. If you take an antibiotic, ask your pharmacist how to separate it from magnesium supplements, magnesium-containing antacids, or other mineral products. Do not change or skip prescribed antibiotic doses.

Source: NIH Office of Dietary Supplements — Magnesium

Check the label for the amount of elemental magnesium per serving. Product names and the total weight of a magnesium compound do not necessarily indicate how much magnesium it supplies.

Questions to ask before taking magnesium

• Is there a nutritional or medical reason for me to take it?
• Could my symptoms have another cause?
• Does it interact with my antibiotics or other medicines?
• Does my kidney function affect its safety?
• How much elemental magnesium is in each serving?

Sources and related reading

• NIH Office of Dietary Supplements: Magnesium — Consumer Fact Sheet
• NIH Office of Dietary Supplements: Magnesium — Health Professional Fact Sheet
• CDC: Treatment and Intervention for Lyme Disease
• Browse the supplement education hub
• Read about Lyme disease fatigue