Review · Urinary health

ProstaStream review: a long ingredient list, measured against the research

ProstaStream is a prostate support capsule with 32 ingredients. A long list can look generous on a label. We checked what each part contributes, where the doses come from, and what the sales video promises that the studies do not.

By Grant Whitaker, Editor · Updated October 23, 2026 · 15 studies checked on PubMed

What ProstaStream is

ProstaStream is a dietary supplement marketed to men who want to support prostate and urinary comfort. The label lists the distributor as ProstaStream of Englewood, Colorado. It is sold through a video sales page, with checkout handled by the BuyGoods retail platform. The serving is two capsules a day, and one bottle of 60 lasts a month. Every package is a one-time purchase.

The pitch rests on three ideas: a botanical formula picked from "more than 144" candidates, a nightly routine that takes seconds, and a change in the prostate itself within weeks. We look at all three below.

The label, in plain terms

The Supplement Facts panel is published on the official site's references page. The seller's terms do not allow copying site content, so we describe it here rather than reproduce it. It falls into three groups:

• Five vitamins and minerals: vitamin E 13 mg, vitamin B6 3.33 mg, zinc 10 mg, selenium 140 mcg (255% of the Daily Value) and copper 0.2 mg.
• Thirteen dosed botanicals: plant sterol complex 300 mg, saw palmetto berry 200 mg, pygeum bark 100 mg, red raspberry, graviola leaf (Annona muricata) and green tea leaf at 50 mg each, cat's claw 30 mg, broccoli leaf and stinging nettle leaf at 20 mg each, and tomato, maitake, reishi and shiitake at 10 mg each.
• A 142 mg proprietary blend of fourteen more items: quercetin, juniper berry, uva ursi leaf, buchu leaf, three amino acids, calcium D-glucarate, pumpkin seed, burdock root, cayenne, goldenseal root, gravel root and marshmallow root. No individual amounts are given.

Two details stood out. The front of the bottle says "60 tablets," while the serving size reads "2 capsules" and the other ingredients include a gelatin shell. It is probably a printing slip, but labels should agree with themselves. And the allergen line notes soy, which tells you the plant sterols come from soy.

The formula next to the research

For each ingredient that the sales page leans on, we looked for human trials on urinary symptoms in men and compared the amounts used there with a daily serving of ProstaStream.

Pygeum: the ingredient doing the most work

Pygeum comes from the bark of an African cherry tree. A Cochrane review of 18 randomized trials (1,562 men) found that men taking it were about twice as likely as those on placebo to report overall improvement in symptoms. Nighttime urination fell by 19% and peak flow rose by 23% on average ^[1]. The reviewers added fair warnings: the trials were small, lasted 64 days on average, and used a range of doses and preparations. ProstaStream's 100 mg sits in the commonly studied range, though the label does not say whether its bark is a standardized extract like the ones tested.

Plant sterols: a promising amount with a missing number

Beta-sitosterol is the best-known sterol in this class. Its Cochrane review pooled four placebo-controlled trials with 519 men, lasting 4 to 26 weeks. Symptom scores improved by 4.9 points on the standard scale, and peak flow by about 3.9 mL per second, compared with placebo. Prostate size did not change ^[2]. In the Lancet trial, 200 men took 20 mg three times a day for six months ^[3].

ProstaStream lists 300 mg of "plant sterol complex." If even a quarter of that is beta-sitosterol, it would exceed the Lancet dose. The label does not tell us the share, so we give credit for potential rather than a confirmed match.

Saw palmetto: well studied, and the answer is mostly no

The sales video calls saw palmetto the "sworn enemy" of DHT. The research on what men actually feel is less exciting. In a one-year trial of 225 men over 49, 320 mg a day did no better than placebo on symptoms, flow or prostate size ^[4]. In a later trial of 369 men, raising the dose to three times the standard amount still did not beat placebo ^[5]. The 2023 Cochrane update, covering 27 studies, concluded that saw palmetto alone offers little to no benefit for these symptoms ^[6]. ProstaStream's 200 mg is below even the standard dose.

Nettle and quercetin: interesting trials, small amounts

One six-month trial in 620 men reported that 81% of those taking stinging nettle described improvement, compared with 16% on placebo. The author called for more trials before drawing conclusions, and the abstract does not give the preparation or daily amount ^[7]. ProstaStream uses 20 mg of nettle leaf, so we cannot say whether it resembles what was tested.

Quercetin was studied in 30 men with chronic pelvic pain at 500 mg twice a day for a month, and symptom scores improved more than with placebo ^[8]. It was a small, short study in a different group of men. In ProstaStream, quercetin shares a 142 mg blend with thirteen other items.

The rest of the list

Pumpkin seed appears in the blend. In the GRANU trial, 1,431 men aged 50 to 80 ate 10 grams of whole seeds a day for a year; the seed group did modestly better than placebo, while the capsule extract group did not ^[9]. A pinch inside a blend is a long way from 10 grams.

For graviola, the mushroom trio, cat's claw, red raspberry, broccoli leaf, tomato powder, burdock, buchu, gravel root and marshmallow root, we found no human trials on urinary symptoms in men. Many are present at 10 to 50 mg, amounts that look more like label decoration than a studied dose.

What the marketing claims, and what we could verify

• A short bedtime routine that changes prostate size within weeks. This is the video's headline. We found no published study of ProstaStream, and the two ingredients with the best reviews did not shrink the prostate in their trials ^{[2] [4]}. We could not verify this claim, and we would not expect a supplement to deliver it.
• Saw palmetto as a DHT fighter, citing the University of Michigan. The site's references page links to a University of Michigan consumer health library page, which is not a study. The controlled trials on symptoms are covered above.
• Mushrooms "proven" in a journal, and broccoli confirmed by a "Journal of Synthetic Chemistry." No article titles or authors are given, and we could not trace either statement to a human trial on prostate or urinary outcomes.
• "More than 144" ingredients tested and "more than 1,764 men" served. No data is offered for either figure.
• The references page. It lists four links: two health information pages, a news blog post and a study measuring mineral levels in men with prostate cancer. None tests ProstaStream or its formula.
• "Only available today." The video says the discount ends soon. The package prices are fixed in the site's code, with no date attached.

Price, packages and refund policy

One bottle lasts 30 days. Prices on the official site when we checked:

• 6 bottles: $49 each ($294 total), free US shipping. About $1.63 a day.
• 3 bottles: $59 each ($177 total), free US shipping.
• 1 bottle: $69, free US shipping.

Shipping to Canada, the UK, Ireland, Australia and New Zealand costs $15.95. The order flow is set up to offer extra bottles at a lower price after checkout; those add-ons are optional.

The refund policy is the weak spot. You have 60 days from the date your order ships, you must send back all the bottles to an address in Aurora, Colorado, and the return postage is yours to pay. Since the pygeum and sterol trials ran two to six months, a 60-day window gives you little time to judge a 6-bottle order. If you want to try it, a 3-bottle package keeps more of your money inside that window.

Safety

Most single ingredients here were well tolerated in their trials, with side effects similar to placebo ^{[1] [6]}. A few deserve a closer look because of the long ingredient list:

• Goldenseal and your medications. In healthy volunteers, 28 days of goldenseal cut the activity of two major drug-processing liver enzymes (CYP2D6 and CYP3A4/5) by roughly 40%, and the authors warned of possible serious interactions with drugs that rely on them ^[11]. Those enzymes handle many common prescriptions. ProstaStream's goldenseal is a small, undisclosed part of a 142 mg blend, which makes the risk hard to size and is one more reason to show the label to your doctor or pharmacist.
• Graviola. In Guadeloupe, people with an unusual form of parkinsonism had eaten more soursop than comparison groups ^[12], and researchers measured annonacin, a nerve toxin, in the fruit and leaves ^[13]. Those were large, long-term exposures, and 50 mg of leaf is small. The label does not state annonacin content, though, so we flag it rather than dismiss it.
• Uva ursi. A safety review concluded that recommended doses are safe for short-term use ^[14]. Its amount here is not disclosed.
• Green tea leaf. A US Pharmacopeia review linked concentrated green tea extracts to rare liver injury and advises taking them with food ^[15]. ProstaStream lists 50 mg of leaf, well below the amounts in those reports.
• Vitamin E and selenium. In SELECT, a trial of 35,533 healthy men, 400 IU of vitamin E a day was linked to a small rise in prostate cancer risk, and 200 mcg of selenium showed no benefit ^[10]. ProstaStream's 13 mg of vitamin E is far below that dose, and its 140 mcg of selenium is below the trial amount. If you already take a multivitamin, add up your selenium.

Talk to your doctor before starting ProstaStream, especially if you take blood thinners, heart or blood pressure medication, antidepressants, or anything for your prostate or bladder. Results vary from person to person. Urinary symptoms that are new, getting worse, or come with pain, blood or fever deserve prompt medical care.

What we liked and what gave us pause

Frequently asked questions

Where can I buy ProstaStream?

On the official website, with checkout through BuyGoods. The affiliate terms prohibit selling it on Amazon, eBay or classified sites, so listings there may not be genuine or covered by the refund policy.

How long before I notice anything?

Results vary. The pygeum trials averaged about two months and the sterol trials ran up to six, so a week or two is too early to judge. Keep the 60-day refund deadline in mind while you wait.

Can I take ProstaStream with my prescriptions?

Ask your doctor or pharmacist first. Goldenseal, one of the blend ingredients, slowed the breakdown of drugs in a human study. Never stop or change a prescription on your own.

Is it a subscription?

No. Each package is a single payment.

How does it compare with other prostate formulas?

It shares pygeum and sterols with several competitors and adds a long tail of low-dose botanicals. A longer list does not mean more support; the two ingredients with the best evidence carry most of the weight here.

How we reviewed ProstaStream

We read the transcript of the sales presentation, the refund, shipping and terms pages, and transcribed the Supplement Facts label published on the official site. We then searched PubMed for human trials of the main ingredients on urinary symptoms in men, and for safety and interaction data on the botanicals that raised questions, and compared the amounts studied with the label. We did not test the product on people, and nobody at Stark Verve is a medical professional. Read our editorial policy to learn how we choose and update reviews. This is an independent review page, and Stark Verve is paid a commission if you buy through our links; that never changes what we write about the evidence.