I spent two years researching what men over 40 actually need.What I found made me build this.
Most supplements are underdosed, overmarketed, and hidden inside proprietary blends. Prostonic isn't. Every ingredient listed. Every dose justified. Nothing hidden.
Prostonic — High-Strength Men's Formula 40+
You've been burned by supplements before.
Prostonic vs. what you've tried before.
| Prostonic | Typical supplement | |
|---|---|---|
| No proprietary blends | ✓ | ✗ |
| Doses match research | ✓ | ✗ |
| UK GMP manufactured | ✓ | Sometimes |
| Batch tested every run | ✓ | ✗ |
| Published references | ✓ | ✗ |
| 30-day guarantee | ✓ | ✗ |
Built in Britain.
Backed byevidence.
GMP-certified. Zinc contributes to normal testosterone levels; selenium to normal spermatogenesis. Every dose on the label.
Seven ingredients. Every dose visible.
- Zinc contributes to the maintenance of normal testosterone levels in the blood, and to normal fertility and reproduction.
- Selenium contributes to normal spermatogenesis.
- Vitamin D3 contributes to the normal function of the immune system and to normal muscle function.
No proprietary blends. No hidden doses. Every number verifiable against the published research used in formulation.
"I spent two years going through the research on male nutritional health in your 40s. What I found was a category full of underdosed ingredients hidden in proprietary blends. I built Prostonic because the product I was looking for didn't exist."
What they say.
""The doses are serious, not decorative. You can verify every number against the research.""
"Proper dosing, clear label. The packaging tells you this is a different kind of company before you even open it."
"First brand that made me feel like someone actually did the research. The transparency alone is worth the price."
Common questions.
What is Prostonic and who is it for?
A daily food supplement for men 40+. Seven individually dosed ingredients. Not a medicine — does not treat any condition.
How long before I notice a difference?
We recommend 60–90 days of consistent use. Supplements work over time, not overnight.
Is it safe alongside other medications?
Consult your GP if taking prescribed medication. Check combined intake if also taking a multivitamin containing Zinc, Selenium or Vitamin D3.
What's your returns policy?
30-day satisfaction guarantee on all first orders. Contact us for a full refund — no return required, no small print.
Join 400+ men who chose
evidence over marketing.
Food supplements should not be used as a substitute for a varied diet. Not intended to diagnose, treat, cure, or prevent any disease. © 2026 Sagewell Health Ltd. Registered in England & Wales.