Safety
Prostate Supplement Side Effects: What to Watch For, Ingredient by Ingredient
Prostate supplement side effects are usually mild, such as stomach upset, dizziness, headache or a niacin flush. The bigger risks are interactions: ginkgo, ginseng and vitamin E can add to bleeding with blood thinners. Which side effects you meet depends on the ingredients, so read the panel line by line.
Written by the Protoflow label deskUpdated · 4 min read
Most common01
What are the most common prostate supplement side effects?
Mild digestive upset, dizziness and headache lead the list.
NCCIH describes saw palmetto as well tolerated, with mild and infrequent digestive symptoms, dizziness and headache (NCCIH, Saw Palmetto). Ginkgo extract has the same pattern (NCCIH, Ginkgo).
Multi-herb formulas add up. NIH says side effects are most likely at high doses, in place of prescribed medicines, or when many supplements are combined (NIH ODS, Dietary Supplements: What You Need to Know).
By ingredient02
Which ingredient causes which side effect?
Seven ingredients on the Protoflow panel have a documented caution.
| Ingredient | Documented caution |
|---|---|
| Niacin 75 mg | Flushing is typical above about 30-50 mg of nicotinic acid; the upper limit is 35 mg (NIH ODS, Niacin) |
| Vitamin E | Can add to bleeding risk with blood thinners (NIH ODS, Vitamin E) |
| Ginkgo | May raise bleeding risk with warfarin (NCCIH, Ginkgo) (NCCIH, Herb-Drug Interactions) |
| Chinese ginseng | May lower blood sugar with insulin or sulfonylureas; trouble sleeping (MSK, Ginseng (Asian)) |
| Hawthorn | May interfere with digoxin and add to blood pressure drugs (MSK, Hawthorn) |
| Tribulus | Stomach irritation; case reports of liver and kidney toxicity (MSK, Tribulus terrestris) |
| Inosine | Turns into uric acid, a concern for gout risk (UofM Health (Healthwise), Inosine) |
Protoflow: from $49 a bottle60 capsules · 2, 3 or 6 bottles · free US shipping on 3 or 6 · 60-day guarantee
See packsWhat to do04
What should you do if a prostate supplement upsets you?
Pause, note what changed, and call your pharmacist or doctor.
Write down the symptom, the date and the dose. Keep taking any prescribed medicine, and never change it because of a supplement. The Protoflow side effects page and the medicine check cover the label lines in full. For a related look, read are prostate supplements safe.
FAQ05
Side effects: questions readers ask
Can prostate supplements cause stomach pain?
Yes, in some people. Tribulus and cayenne list stomach irritation (MSK, Tribulus terrestris) (MSK, Cayenne), and saw palmetto lists mild digestive symptoms (NCCIH, Saw Palmetto).
Why does niacin make my face hot and red?
Nicotinic acid widens small blood vessels. Flushing is unpleasant rather than toxic and typically starts near 30-50 mg (NIH ODS, Niacin).
Do prostate supplements affect sleep?
Ginseng can cause insomnia and nervousness (MSK, Ginseng (Asian)). If sleep changes after you start a supplement, mention it to your pharmacist.
Can a prostate supplement change a PSA result?
Saw palmetto does not appear to affect PSA readings (NCCIH, Saw Palmetto), but tell your doctor about every supplement before a PSA test (NCI, PSA Test Fact Sheet).
Are side effects worse with several supplements at once?
They can be. NIH links side effects to high doses and to combining many supplements (NIH ODS, Dietary Supplements: What You Need to Know).
Who wrote this06
Written and reviewed by
Pages built from the label, the brand pages and linked NIH, FDA, FTC, NICE and peer-reviewed sources.
Last updated . See our editorial standards and how we check reviews. This website is run by a USA authorized Protoflow retailer, not by the manufacturer or distributor, PhytoThrive Labs. We make money when you buy through our order links.
Keep reading
Related Protoflow reading
USA Authorized Protoflow Retailer
Ready to try Protoflow?
Check your medicines, then choose a pack. Three or six bottles ship free in the US, cost less per bottle and add four bonus ebooks, and the 60-day guarantee covers every pack.
- Secure checkout on the info page
- 60-day guarantee
- Ships from the U.S.
