Science check
Icariin as a PDE5 Inhibitor: Test Tube vs Human
Icariin is a PDE5 inhibitor in a laboratory enzyme assay, where it blocked human PDE5A1 (Dell'Agli 2008, Icariin and PDE5 (lab)). That is a test-tube result, not a human trial. Memorial Sloan Kettering cites no human sexual-function trial for horny goat weed (MSK, Epimedium (horny goat weed)). HoneyBoost prints 10 mg of extract per gummy and no icariin amount.
- Label serving1 gummy (4.2 g)
- Per bottle30 gummies
- Guarantee60 days (offer page)
Written by the HoneyBoost label deskUpdated · 4 min read
The lab result
What does it mean that icariin is a PDE5 inhibitor?
It means icariin slowed a PDE5 enzyme in a lab dish. PDE5 is the enzyme that prescription erection medicines target.
In the 2008 assay, an Epimedium extract and icariin inhibited human recombinant PDE5A1. Icariin's IC50 was 5.9 micromolar (Dell'Agli 2008, Icariin and PDE5 (lab)). IC50 is the concentration that cuts the enzyme's activity by half. The authors then altered the molecule to make it stronger.
The work used purified enzyme, not people. It cannot say whether a swallowed gummy reaches the same concentration in the body, or does anything there.
The FTC says health claims need human clinical testing, and animal or lab studies alone are not enough (FTC, Health Products Guidance).
Human evidence
Does horny goat weed work like an erection medicine?
We found no source showing that. MSK lists no human trial of sexual function (MSK, Epimedium (horny goat weed)), and LiverTox says extract studies look promising but are not proven in rigorous trials (LiverTox, Horny goat weed).
Multi-ingredient trials showed slight or no benefit, and the reviews are mixed. A drug's effect also depends on a measured dose, and the plant's icariin content differs by product.
| Question | Answer in our sources |
|---|---|
| Blocks PDE5 in a test-tube assay? | Yes, icariin |
| Human sexual-function trial cited? | None (MSK) |
| Proven in rigorous controlled trials? | No (LiverTox) |
| Icariin amount on HoneyBoost label? | Not printed |
On the label
Is 10 mg of horny goat weed extract an erection pill?
No. The label prints 10 mg of horny goat weed extract at 8:1, an 80 mg root equivalent, and it prints no icariin figure.
LiverTox says the plant is sold as 250 or 500 mg tablets or capsules. The label amount is roughly 25 to 50 times less, though extract strengths differ. The label does not claim to treat erectile dysfunction in words. Front-label claims such as "Peak Stamina" are the brand's, and the evidence here does not back an erection effect.
- 01
Check the seal and your medicines
On a new bottle, check that the seal is intact. Read the Supplement Facts. List any levodopa, nitrate, erection, blood pressure or diabetes medicine you take and ask your doctor or pharmacist first.
- 02
Read your bottle for directions
The label's serving is 1 gummy (4.2 g). The supplied label shows no directions block, the seller's FAQ page says one gummy a day with water, and you should follow your own bottle. Go with what your bottle says.
- 03
Keep one bottle a month
30 gummies at 1 a day is 30 days. A 3-bottle pack covers 90 days and 6 cover 180. Remember each gummy has 3 g of added sugar.
- 04
Track how you feel and see your doctor
Note sleep, stress and any side effects in a simple log. Erection trouble or low drive that lasts deserves a doctor's visit, whatever you take.
HoneyBoost: 2, 3 or 6 bottles30 gummies a bottle · 30 days at 1 a day · 60-day money-back guarantee
See packsWhy it matters
Why does a PDE5 label claim matter for safety?
Because real PDE5 drugs interact with nitrates and can drop blood pressure to dangerous levels (StatPearls, PDE5 inhibitors (nitrates contraindicated)). The FDA has found hidden drug ingredients in other enhancement products (FDA, Sexual enhancement product notifications).
That is a category warning, not a finding about HoneyBoost. Still, if you take nitrates or any erection medicine, ask your pharmacist before adding a supplement. Keep taking prescribed medicine. Chest pain means call 911, and an erection over 4 hours needs emergency care.
If you want to go ahead, packs cover 60, 90 and 180 days. Confirm the terms at checkout.
90-day supply
3 bottles: 90 days
$20790 gummies · 1 a day
Shipping as shown at checkout · 60-day money-back guarantee
Order 3 bottles
Longest supply
6 bottles: 180 days
$294180 gummies · 1 a day
Shipping as shown at checkout · 60-day money-back guarantee
Order 6 bottlesA 2-bottle pack is also sold. Prices are the ones on the seller sales page; the live checkout is final. Check your medicines with your doctor or pharmacist before you order.
FAQ
HoneyBoost questions people ask
What does PDE5 stand for?
PDE5 means phosphodiesterase type 5, an enzyme in the body. Prescription erection medicines block it. In one lab assay, icariin also blocked human PDE5A1, but that is not a human trial.
Is icariin the same as a prescription drug?
No. Icariin is a compound from horny goat weed. It blocked a PDE5 enzyme in a lab dish, and the authors changed the molecule to improve it. No human trial in our sources tested it.
Can a supplement replace an erection medicine?
A supplement is not a medicine, and no source we read shows horny goat weed can replace one. Erection trouble has treatable causes, so see a doctor rather than swapping prescriptions.
Who wrote this
Written and reviewed by
Pages built from the label, the brand panels and linked NIH, FDA, CDC, FTC and peer-reviewed sources.
Last updated . Read our editorial standards and how we check reviews. This website is the information site for a USA Authorized HoneyBoost Retailer. It is not the manufacturer or the distributor named on the label. We earn money when you buy through our order links.
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Check your medicines first, especially nitrates, erection medicines and blood pressure medicine, then pick a pack. One bottle is 30 days at 1 gummy a day; 3 bottles cover 90 days and 6 cover 180.
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