Magnesium Taurate Supplements: Do They Help Dry Eyes?

Magnesium taurate supplements are not an established treatment for dry eye. Magnesium and taurine have roles in normal body and eye function, but that does not show that taking this combination relieves burning, improves tear production or treats the cause of dryness. Reviews discussing their potential eye-health benefits do not establish an effective oral magnesium-taurate regimen for dry eye. (Magnesium review, taurine review)

If you are considering buying it specifically for eye comfort, prioritize cause-specific dry-eye care rather than treating the supplement as a replacement for drops or an eye examination.

What magnesium taurate is—and what the evidence means

Magnesium taurate is a compound of magnesium, a mineral, and taurine, an amino acid. It is a form of magnesium supplement, not an eye drop. A published magnesium-taurate experiment investigated blood pressure and heart injury in rats exposed to cadmium; it was not a human dry-eye trial. Its results cannot establish an eye-comfort benefit. (Original study)

Eye-health claims also draw on research about the ingredients separately:

• Magnesium: A review of possible uses in glaucoma, cataract and diabetic retinopathy describes biological reasons for further investigation, but explicitly notes that clinical trials are scant. Those conditions are not interchangeable with dry eye. (Clinical review)
• Taurine: A 2023 review discusses visual fatigue and protection of the retina—the light-sensitive tissue at the back of the eye. Much of the mechanistic evidence concerns animal models and cells. This does not demonstrate that oral magnesium taurate improves the tear film on the eye’s surface. (Taurine review)

Correcting a nutritional deficiency is a separate medical goal from treating dry eye. Dryness alone is not enough to establish that you need magnesium supplementation; assessing magnesium status can require both clinical evaluation and laboratory testing. (NIH Office of Dietary Supplements)

Read the magnesium dose, not just the compound weight

There is no established evidence-based magnesium-taurate dose for dry eye. If a clinician recommends magnesium for another reason, check the U.S. Supplement Facts panel:

1. Find the line labeled Magnesium. This lists elemental magnesium—the amount of the mineral itself—not the weight of the whole magnesium-taurate compound.
2. Check the serving size. The listed amount may require more than one capsule.
3. Add magnesium from other supplements and magnesium-containing medicines, including some antacids and laxatives.

For example, if a label lists “Magnesium: 100 mg” per two-capsule serving, two capsules supply 100 mg of elemental magnesium—not 100 mg each. The NIH explains this distinction in its magnesium fact sheet.

For healthy adults, the U.S. tolerable upper intake level is 350 mg daily from supplements and medicines. It excludes magnesium naturally present in food and beverages. This is a safety limit, not a target, an eye-treatment dose or a guarantee of safety for everyone; higher supplemental doses should be clinician-directed. (NIH safety guidance)

Safety checks before taking it

Magnesium supplements can cause diarrhea, nausea and abdominal cramps. Impaired kidney function increases the risk of magnesium toxicity because the kidneys cannot remove excess magnesium effectively. If you have kidney disease, get medical advice before taking it. (NIH safety guidance)

Medication timing also matters. Magnesium can reduce absorption of certain antibiotics, including doxycycline. NIH advises taking these antibiotics at least two hours before, or four to six hours after, a magnesium-containing supplement. Oral osteoporosis medicines such as alendronate can also interact. Ask a pharmacist to check your particular medicines and schedule. (NIH interaction guidance)

What to prioritize for dry-eye relief

For mild dry eye, artificial tears are a standard starting option. Reducing direct airflow, taking screen breaks and addressing a dry indoor environment may also help. Persistent symptoms deserve an eye examination to assess tear quantity, tear stability and eyelid structure; treatment depends on the cause. (National Eye Institute)

Our lubricating eye-drop guide explains selection by need, including contact-lens checks. For a broader look at nutrition claims, see food supplements for dry eyes.

Seek same-day eye-care attention for eye pain, light sensitivity or sudden vision changes; sudden loss of vision requires emergency care. Do not wait to see whether a supplement helps. (Urgent eye-symptom guidance)