Short answer

We found no documented interaction between Carnitine and Tribulus terrestris in the sources below. That isn't proof the combination is right for you: check each one's cautions, and ask your pharmacist if you take medication.

Carnitine

What it is: A nutrient the body makes and gets from meat; it helps turn food into energy.

What the research says: Healthy people make all they need. Results for dementia and other conditions are mixed.

Cautions

• 3 g a day or more can cause nausea, cramps, diarrhea and a fishy body odor.
• High amounts may cause muscle weakness in kidney disease and raise seizure risk in people with seizure disorders.

Medicines to check

• Some anti-seizure medicines (phenobarbital, valproic acid) and long-term use of some antibiotics can lower carnitine levels

In Holitro: Carnitine (500 mg per capsule)

Source: NIH Office of Dietary Supplements: Carnitine: Fact Sheet for Consumers (updated May 2023)

Tribulus terrestris

What it is: A plant sold with claims that it raises testosterone.

What the research says: The few studies on strength or muscle found no benefit.

Cautions

• It hasn't been studied enough to know whether it's safe; high doses damaged the heart, liver and kidneys in animals.
• Sports-medicine experts advise against supplements claimed to boost testosterone.

Medicines to check

• Talk to your clinician if you take any medicine

In Holitro: Tribulus (500 mg per capsule)

Source: NIH Office of Dietary Supplements: Dietary Supplements for Exercise and Athletic Performance (updated March 2021)

Check with your doctor or pharmacist, especially if you take medication.

Check your stack — free

Educational information only, not medical advice. This reflects general ingredient overlap, not a personalized safety review. Always check with your doctor or pharmacist before combining supplements, especially if you take medication, are pregnant or nursing, or manage a health condition. These statements have not been evaluated by the FDA.