Short answer

We found no documented interaction between Tribulus terrestris and Triphala 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.

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)

Triphala

What it is: A traditional Ayurvedic blend of three dried fruits (amalaki, bibhitaki and haritaki), used mainly for digestion.

What the research says: It's traditionally used as a gentle laxative. Most other proposed benefits come from lab and animal studies, not good human trials.

Cautions

• There's little human safety research. Because it acts as a laxative, loose stools are possible.

Medicines to check

• Talk to your clinician if you take any medicine

In Holitro: Triphala (500 mg per capsule)

Source: PubMed review: Therapeutic Uses of Triphala in Ayurvedic Medicine (2017) (updated July 2017)

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.