For readers who know saw palmetto
Vapofil and Saw Palmetto: 20 mg Against the 320 mg Used in Trials
Quick answer: Vapofil holds 20 mg of saw palmetto berry extract per serving. Trials used about 320 mg a day of a standardised extract, so this is about a sixteenth. Those trials studied prostate symptoms, not libido, and NCCIH reports little or no benefit for them when saw palmetto is used alone.
Why is saw palmetto the herb most people know in Vapofil?
Of the seven actives, saw palmetto is the name a typical reader has heard before. It appears on prostate formulas, men's vitamins and health shop shelves. Its familiarity does a quiet job for the whole product: a known name makes an unknown panel feel safer.
On the Vapofil panel it is the first row, listed as saw palmetto berry extract at 20 mg per two-capsule serving. It shares that amount with wild yam, sarsaparilla, nettle and the boron chelate. Five rows at 20 mg, then tongkat ali at 10 mg and horny goat weed at 8 mg, make the 118 mg total.
This post asks one thing about that first row. Does the amount on the bottle match the amount that was studied, and was the study about what the product is sold for? Both answers come from the National Center for Complementary and Integrative Health, or NCCIH.
How does 20 mg compare with the amount used in trials?
NCCIH reports that trials used around 320 mg a day of a standardised extract. Vapofil holds 20 mg in a day's serving. Divide 320 by 20 and you get sixteen. The bottle carries about a sixteenth of the studied amount.
| Point | Vapofil | Research |
|---|---|---|
| Daily amount | 20 mg of berry extract | About 320 mg a day of a standardised extract |
| Standardised? | Not published | Yes, per the trials |
| What was measured | Nothing claimed on the label | Prostate symptoms (BPH) |
| Length | 30 days in one bottle | Trials commonly 6-12 months; safety data to 3 years |
Two cautions on reading this table. A sixteenth is a plain sum, not a verdict. And the extract in a trial and the extract in a capsule may differ, which is exactly why the missing standardisation figure matters. Without it you cannot line the two up.
What does NCCIH say saw palmetto does?
Two sentences carry the whole file. The first is about the prostate: NCCIH says that this herb, when administered alone, provides little or no benefit for BPH symptoms. BPH is the benign enlargement of the prostate gland, and urinary symptoms are what the trials measured.
The second is about everything else. NCCIH says there is not enough evidence to determine whether saw palmetto is useful for other health purposes. Sexual desire, hormones and performance are not addressed at all.
So the best-known herb on the panel has a research file that is largely negative for its main use, and silent about the use Vapofil is sold for. That is not a scandal. It is where the evidence sits.
What are the key facts?
- Vapofil amount: 20 mg of saw palmetto berry extract per two-capsule serving.
- Trial amount: about 320 mg a day of a standardised extract. Vapofil's standardisation is not published.
- NCCIH: used alone, saw palmetto provides little or no benefit for BPH symptoms.
- NCCIH: there is not enough evidence to say whether it is useful for other health purposes.
- The research is about the prostate. It does not measure libido.
- NCCIH reports it is generally well tolerated, with mild digestive symptoms, dizziness and headache reported.
Does a prostate herb belong in a libido formula?
It belongs there by association, not by biology. A man who notices a change in sexual function is often the same man who notices a change in urinary function. A formula that gathers prostate herbs reads as relevant to both. The studies do not cross over, though. None of the BPH studies measured desire or erectile function as an endpoint.
The idea that links saw palmetto to hormones is that it might block an enzyme, 5-alpha-reductase, which turns testosterone into a stronger form. That is the same target as a prescription drug used for the prostate. The hypothesis was attractive. The trials did not bear it out at the amounts used, according to the NCCIH summary above.
If you have urinary symptoms, such as getting up often at night or a weak flow, the answer is a check with your doctor. Twenty milligrams of a herb is not a plan for that.
Is saw palmetto safe, and for whom?
NCCIH reports that saw palmetto is generally well tolerated and has been used safely in studies for up to three years. Mild digestive symptoms, dizziness and headache have been reported. It may be unsafe in pregnancy or breastfeeding.
That is about saw palmetto alone. The safety flags that matter most on the Vapofil panel belong to two other herbs, nettle and horny goat weed. Memorial Sloan Kettering lists nettle with diuretics, blood pressure medicines and CYP450 substrates, and horny goat weed with heart disease, CYP3A4 substrates and aromatase inhibitors. Our side effects page sets them out in full.
The bottle's own caution block says not to exceed the recommended dose, and that anyone with a known medical condition should consult a physician. Under-18s are covered by the same sentence.
What would make the saw palmetto row more useful?
Three small facts would do it. The first is the standardisation: a stated percentage of the compounds the research measures. The second is the extract's source and form, since studies use specific preparations. The third is a stated reason for the amount.
None of the three is published. This is not unusual, and it is not a charge of bad faith. It is a plain gap that leaves a reader unable to compare the row with anything. Our post on why a ratio is not a dose explains how the same gap affects the two concentrated extracts.
Until those facts exist, the best use of the row is as a reminder to do the division. Find the studied amount, divide, and look at what the study measured.
What do the label, price and guarantee say?
| Item | What is published |
|---|---|
| Saw palmetto berry extract | 20 mg per serving |
| Serving | 2 capsules daily with an 8 oz. glass of water; 30 servings per bottle |
| Total actives | 118 mg per serving |
| Standardisation of any ingredient | Not published |
| Price | Not published on this site; the live figure is at checkout |
| Guarantee | 60 days from purchase, unless the sales page prints a longer window |
| Pack this site suggests for a first order | One bottle, which finishes inside the window |
Vapofil is not FDA approved and makes no claim to treat any prostate condition. The front of the bottle carries no claim at all.
Which sources does this post use?
Every outside fact below comes from a source named on this site. Nothing else is cited.
- National Center for Complementary and Integrative Health (2026). Saw Palmetto. https://www.nccih.nih.gov/health/saw-palmetto
- Memorial Sloan Kettering Cancer Center (2026). Nettle - About Herbs. https://www.mskcc.org/cancer-care/integrative-medicine/herbs/nettle
- Memorial Sloan Kettering Cancer Center (2026). Epimedium - About Herbs. https://www.mskcc.org/cancer-care/integrative-medicine/herbs/epimedium
- National Center for Complementary and Integrative Health (2026). Dietary Supplements Marketed for Weight Loss, Bodybuilding, and Sexual Enhancement: What the Science Says. https://www.nccih.nih.gov/health/providers/digest/dietary-supplements-marketed-for-weight-loss-bodybuilding-and-sexual-enhancement-science
Frequently asked questions
How much saw palmetto is in Vapofil?
20 mg of saw palmetto berry extract per two-capsule serving. The standardisation is not published.
Is 20 mg of saw palmetto enough?
Trials used about 320 mg a day of a standardised extract, so 20 mg is about a sixteenth. No trial of this formula at these amounts is published.
Does saw palmetto help with libido?
NCCIH says there is not enough evidence to determine whether it is useful for other health purposes. Its research is about the prostate, not libido.
Does saw palmetto help an enlarged prostate?
NCCIH reports that, when administered alone, it provides little or no benefit for BPH symptoms. See a doctor for urinary symptoms.
Are there side effects?
NCCIH reports mild digestive symptoms, dizziness and headache. It may be unsafe in pregnancy or breastfeeding.
Is Vapofil a prostate supplement?
No. It is sold for men's libido and sexual performance, and the label makes no prostate claim.
Our view
Saw palmetto is the herb that makes the panel look familiar. When you look closely, it is a sixteenth of the studied amount, researched for a different organ, with a result that NCCIH calls little or no benefit when used alone.
None of that makes the capsule harmful. It means the best-known name on the label is not the one doing the persuading in any evidence you can check. If you try the bottle, do it for curiosity, keep notes, and use the return window if nothing changes.
Vapofil is not FDA approved, and no dietary supplement is. This post is general information, not medical advice. Take medical questions to your doctor or pharmacist.
Last updated October 29, 2026. Medically reviewed by Dr. Lindsey Wells, ND, Naturopathic physician, on October 16, 2026.