An ingredient-by-ingredient look at Provestra's possible side effects and drug interactions, using NIH, NCCIH and LiverTox safety information and the current official formula.
Provestra hasn't been studied as a finished product, so its side effects come from its ingredients. The main concerns are black cohosh (rare but serious liver injury reports), licorice root (can raise blood pressure), valerian (drowsiness, not to be mixed with alcohol or sedatives) and ginkgo and ginseng (bleeding and clotting). Avoid it if you're pregnant or breastfeeding, and talk to your doctor first if you have liver, heart or hormone-sensitive conditions or take regular medication.
Provestra is a once-a-day tablet sold by Leading Edge Health. As of October 2026, its official product page lists 21 ingredients: L-arginine, theobromine, indole-3-carbinol, ginseng, Ginkgo biloba, damiana leaf, black cohosh, red raspberry, licorice root, ginger root, valerian root and kudzu, plus vitamins A, C and E, B-complex vitamins, folic acid, biotin, calcium carbonate, iron and zinc oxide.
The page doesn't show a Supplement Facts panel or the amount of each ingredient. So the side effects below are based on what's known about each ingredient, not on a study of Provestra. Read the label on the box you receive and show it to your doctor or pharmacist, particularly if you take any prescription.
The Provestra page says there are "No reported side effects." That isn't the same as having no side effects. Several of its herbs carry documented cautions, and three of them (black cohosh, licorice and valerian) deserve real attention.
Not according to the current official ingredient list. Red clover is often mentioned alongside Provestra online, but the formula on the Leading Edge Health site as of October 2026 doesn't include it. If your box lists red clover, the label you hold is the one to go by.
The closest ingredient is kudzu root, which, like red clover and soy, is a source of isoflavones. NCCIH describes red clover's isoflavones as structurally similar to estrogen and says red clover supplements may be unsafe in pregnancy or while breastfeeding. Kudzu raises the same kind of question for women with hormone-sensitive conditions, although its safety in that group hasn't been well studied.
Black cohosh is Provestra's most safety-relevant ingredient. In studies lasting up to a year it's generally well tolerated, and the NIH Office of Dietary Supplements says the most commonly reported side effects are mild, short-lived stomach upset and rashes.
The bigger issue is the liver. The NIH's LiverTox database describes more than fifty cases of clinically apparent liver injury linked to black cohosh products, ranging from raised liver enzymes to acute liver failure needing a transplant, and some deaths. Injury usually appeared within 2 to 12 weeks of starting. Some implicated products turned out to contain Asian Actaea species rather than true black cohosh, so whether black cohosh itself is to blame is still debated.
Because of these reports, the US Pharmacopeia recommends that black cohosh products carry a caution to stop use and consult a healthcare practitioner if you have a liver disorder or develop symptoms of liver trouble, such as abdominal pain, dark urine or jaundice. The FDA doesn't require that warning, and we didn't see it on the Provestra product page.
| Ingredient | Possible side effects | Main caution |
|---|---|---|
| Black cohosh | Stomach upset, rash | Rare but serious liver injury reports |
| Licorice root | Raised blood pressure, irregular heartbeat with glycyrrhizin | High blood pressure, heart or kidney disease, corticosteroids, pregnancy |
| Valerian root | Headache, stomach upset, mental dullness, vivid dreams | Don't combine with alcohol or sedatives |
| Ginkgo biloba | Dizziness, stomach upset, headache | May raise bleeding risk with blood thinners |
| Ginseng | Insomnia; rarely rash, liver damage | May lower blood sugar and affect clotting |
| Kudzu, indole-3-carbinol | Limited human data | Hormone-related activity; ask your doctor if you have a hormone-sensitive condition |
NCCIH warns that even small amounts of glycyrrhizin, a compound in licorice root, have been linked to serious effects in some people, including those with high blood pressure, and that large or long-term use can cause irregular heartbeat. It also notes reported interactions with corticosteroids. We don't know whether Provestra's licorice is glycyrrhizin-free, so if you have high blood pressure or heart or kidney disease, check with your doctor.
Valerian may cause headache, stomach upset, mental dullness and vivid dreams, and NCCIH says it shouldn't be taken with alcohol or sedatives. Very rare liver injury has also been reported, most often when valerian was combined with other herbs. If Provestra makes you groggy, valerian is a likely reason.
Ginkgo may raise bleeding risk in people on anticoagulants such as warfarin, and it may not be safe late in pregnancy. Asian ginseng's most common side effect is insomnia, and NCCIH says it may lower blood sugar and interfere with blood clotting. If Provestra's "ginseng" is a different species, its effects may differ, so check the label.
No interaction study has been done on Provestra, so treat its ingredients' known interactions as its own:
Skip it, or get your doctor's go-ahead first, if you:
Stop taking it and see a doctor promptly if you notice dark urine, yellowing skin or eyes, pain in the upper right abdomen, unusual tiredness, unusual bleeding, or a racing or irregular heartbeat.
For how its formula stacks up against a rival product, see our HerSolution vs Provestra comparison. HerSolution takes a different approach, with hops and Mucuna rather than black cohosh and licorice, and has its own cautions covered in our article on HerSolution side effects.
Provestra isn't "side-effect free." Most healthy women will probably tolerate it, but nobody has published a safety study of the full formula, and the product page doesn't list doses. Black cohosh carries rare but serious liver injury reports, licorice can raise blood pressure, valerian can cause drowsiness, and ginkgo and ginseng can affect bleeding. If you're pregnant, have liver, heart or kidney problems, a hormone-sensitive cancer history, or take regular medication, talk to your doctor first. Whether it's worth trying at all is a separate question, which we cover in does Provestra work.