Safety
Protoflow Side Effects: Flushing, Bleeding Notes and Warnings
No safety study of Protoflow exists. Its likeliest side effect is niacin flushing, since 75 mg is above the 35 mg adult limit. Ginkgo and vitamin E can add to bleeding with blood thinners, and ginseng can disturb sleep. Stop and seek help for a serious reaction.
Written by the Protoflow label teamUpdated
Most likely01
What are the most common Protoflow side effects?
The most likely effect is a warm flush of the face, neck and chest from the niacin, followed by stomach upset and headache.
The effects below come from the sources for each label line, not from a trial of Protoflow. Treat the list as a guide to questions, not as a forecast.
No safety study of the blend exists, so this list comes from the effects reported for each line. NIH says 30 to 50 mg or more of nicotinic acid typically causes reddening, burning, tingling and itching within 30 minutes (NIH ODS, Niacin). The label gives 75 mg and does not say which form it is. Ginkgo, saw palmetto and hawthorn are each reported to cause dizziness or stomach upset in some people (NCCIH, Saw Palmetto) (NCCIH, Ginkgo) (NCCIH, Hawthorn).
Most of these pass quickly. They are still worth taking seriously if they last, because a daily capsule repeats them every day.
Ingredient by ingredient02
Which ingredient causes which side effect?
The table maps each reported effect to its label line, so you can see where a symptom might come from.
| Line | Per serving | Reported effects or cautions |
|---|---|---|
| Niacin | 75 mg | Flushing; liver strain and higher blood glucose at high doses (NIH ODS, Niacin) |
| Vitamin E | 13 mg | Bleeding risk at large doses (NIH ODS, Vitamin E) |
| Ginkgo | 120 mg | Dizziness, stomach upset, headache; bleeding with anticoagulants (NCCIH, Ginkgo) |
| Hawthorn | 250 mg | Dizziness, nausea, vomiting, diarrhea, muscle pain (NCCIH, Hawthorn) |
| Epimedium | 250 mg | Sweating; avoid with cardiovascular disease (MSK, Epimedium) |
| Chinese ginseng | 120 mg | Insomnia; clotting and autoimmune cautions (NCCIH, Asian Ginseng) |
| Tribulus | 120 mg | Stomach irritation; rare liver and kidney reports (MSK, Tribulus terrestris) |
| Muira puama | 200 mg | Nervousness, digestive upset, headache possible (Drugs.com, Muira Puama) |
| Saw palmetto | 84.5 mg | Digestive upset, dizziness, headache (NCCIH, Saw Palmetto) |
| Cayenne | 20 mg | Stomach irritation; ACE-inhibitor cough (MSKCC, Cayenne (Capsicum)) |
Damiana, catuaba, inosine and oat straw have no side effect lists in the sources we used, which is not the same as having none.
Red flags03
Which side effects mean you should stop and get help?
Rash, swelling of the face or throat, trouble breathing, chest pain, fainting, unusual bleeding, yellow skin or eyes, or severe stomach pain mean stop and seek care.
Call emergency services for chest pain, trouble breathing, swelling of the face or throat, or fainting. Call a doctor the same day for yellow skin or eyes, dark urine, black stools or bleeding that will not stop. Report any reaction to FDA's MedWatch system as well, since supplements are not tested before sale (FDA, Information for Consumers on Supplements).
See a doctor today
- You cannot pass urine at all, or only a few drops with a full, painful bladder
- Blood or clots in the urine
- Fever or chills with burning or painful urination
- Severe pain in the lower belly, back or genitals
- A sudden change after a fall or injury
Book an appointment
- A weak or slow stream, or stopping and starting
- Needing to go again soon after you finish
- Waking more than usual at night to urinate
- A sudden, strong urge that is hard to hold
- Dribbling after you finish
- A new erection problem, or a PSA you have not discussed
Urinary symptoms can come from an enlarged prostate, infection, diabetes, medicines, sleep apnea, and sometimes cancer. Lists drawn from NIDDK (NIDDK, Enlarged Prostate (BPH)) and MedlinePlus (MedlinePlus, Nocturia). A supplement cannot sort these causes out.
Medicines04
Does Protoflow interact with medicines?
It may, and the label itself says to consult a physician if you take any medication.
The interactions to ask about are blood thinners (ginkgo, vitamin E, ginseng), blood pressure and heart medicines (hawthorn, epimedium, cayenne, tribulus), diabetes medicines (niacin, ginseng, damiana, tribulus) and statins (niacin). FDA has also found hidden drug ingredients in some sexual-enhancement products, which can interact with nitrates (FDA, hidden drug ingredients). That notice is not about Protoflow. We know of no test that found such an ingredient in it.
Do not stop or change a prescribed medicine on your own. The medicines page goes through each group.
Protoflow: from $49 a bottle60 capsules · 2 a day · free US shipping on 3 or 6 · 60-day money-back guarantee
See packsThe niacin line05
Why does niacin get its own warning?
Because it is the one line that breaks a published limit: 75 mg is more than double the 35 mg adult upper limit for supplements.
Upper limits are set to keep nearly everyone safe. Going over one does not make harm certain, and in a healthy man a daily 75 mg is more likely to cause a flush than anything worse. Still, the margin is thinner, and that matters most for people with liver disease, diabetes, gout or ulcers. It also matters when niacin comes from several places at once, such as a multivitamin, an energy drink and a prostate capsule.
Niacin: this label against the adult upper limit
The NIH Office of Dietary Supplements sets the upper limit to avoid flushing, the first effect of too much (NIH ODS, Niacin). The label does not say whether the niacin is nicotinic acid or nicotinamide.
If you flush strongly or feel unwell, the simplest fix is to stop and ask about it. Do not respond by adding a second supplement to calm the flush.
Allergy06
Who might have an allergic reaction to Protoflow?
People allergic to soy or gelatin, or to the plants on the label, should not take it.
The label lists soy protein concentrate and gelatin. It lists no gluten-free statement, though the sales page claims gluten-free. A reaction can include hives, itching, swelling or breathing trouble. If you have a known allergy to ragweed relatives, oats or peppers, ask an allergist, since cayenne and oat straw are on the panel.
Long term07
What is known about long-term use?
Very little: no study of Protoflow exists, and NCCIH notes that no studies have tested hawthorn beyond 16 weeks (NCCIH, Hawthorn).
High doses of nicotinic acid over months or years can harm the liver (NIH ODS, Niacin). Whether 75 mg does so is not known. If you plan to take the capsules for months, tell your doctor and ask whether liver tests make sense. Packs of 3 and 6 bottles run 90 and 180 days, so the question is a real one for many buyers.
FAQ08
Protoflow side effects: questions answered
Does Protoflow cause hot flashes?
A warm, red flush of the face and chest is the common niacin effect. It starts within about 30 minutes and usually fades within an hour.
Can Protoflow upset the stomach?
It may. Several lines, such as cayenne, tribulus, ginkgo and hawthorn, are reported to cause stomach upset in some people.
Does Protoflow cause insomnia?
Ginseng, the main line with that note, is reported to cause insomnia in some people. If sleep gets worse, tell your doctor.
Can Protoflow raise blood pressure?
We found no report that it does. Several herbs on the label may affect blood pressure medicines, so ask a doctor if you take them.
Is Protoflow safe for the liver?
Large niacin doses over time can harm the liver. Whether 75 mg does is unknown. Tribulus has rare liver reports. Ask a doctor if you have liver disease.
How do I report a side effect?
Tell your doctor, and report it to FDA's MedWatch program. You can also tell the order desk by phone at +1 (651) 610-1515.
Who wrote this09
Written and reviewed by
Pages built from the label, the sales page and linked NIH, FDA, FTC and peer-reviewed sources.
Last updated . Read our editorial standards and how we check reviews. This website is run by a USA authorized retailer of Protoflow, not by the manufacturer or the label distributor. Buying through our order links earns us money.
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