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4.68 out of 5 2,183 written reviews
SteelPower: daily support for performance, endurance and blood flow
SteelPower is a once-daily capsule for men that supports blood flow, stamina and sexual performance, built on eight actives including L-citrulline, L-carnitine, maca root and pine bark extract. It is made in the USA and sold only here at steelpowercaps.com.
- Stronger, more reliable performance
- More endurance and staying power
- Circulation support from nitric oxide precursors
- 60-day guarantee
- Free shipping on 3+
- cGMP facility
- Secure checkout
- cGMP facility
- Made in the USA
- Third-party tested
- Non-GMO
- 60-day guarantee
Why men order it
Three things SteelPower is built to support
Performance follows circulation, and circulation follows what you give your blood vessels every day. SteelPower works on that chain from three angles.
Blood flow you can feel
L-citrulline and niacin lead the formula because both feed the nitric oxide pathway, the signal that tells vessel walls to relax and widen. Pine bark and grape skin polyphenols back them up.
Endurance that lasts the night
L-carnitine moves fatty acids into the mitochondria, where muscle turns them into usable energy. Maca root has been used for generations in the Peruvian highlands for stamina and drive.
Drive, mood and confidence
Zinc is tied to normal testosterone levels and male reproductive function, and saffron extract has been studied for mood and libido. Men tell us this part shows up second.
The mechanism
How SteelPower works
SteelPower works upstream of performance, on the blood vessels. Erections and endurance both depend on nitric oxide, a short-lived molecule that signals smooth muscle in the vessel wall to relax so more blood can enter. Your body builds nitric oxide from arginine, and the most reliable way to raise arginine in the blood is to supply L-citrulline, which the kidneys convert to arginine.[4] That is why L-citrulline, not arginine, leads the SteelPower label.
Niacin, vitamin B3, plays a supporting role in the same neighbourhood: it is a vasoactive B vitamin involved in normal blood vessel function.[1] Zinc runs on a different track. It is an essential mineral your body stores poorly and it is required for normal testosterone levels, which is why a shortfall shows up first as low drive.[2] L-carnitine handles energy, carrying fatty acids across the mitochondrial membrane so cells can burn them.[3]
Maca root, pine bark and grape skin extract round it out for stamina and the vessel lining. None of them work in one dose. Nitric oxide support is a daily habit, not a switch, which is why the 3 and 6 bottle supplies are the ones men keep coming back to.[5]
Read the full formula page for the label, the dose transparency note and the complete reference list.
Inside the capsule
The eight actives in SteelPower
One capsule holds eight actives. The manufacturer publishes the full list but not the per-ingredient amounts, so we print no numbers we cannot stand behind. The exact amounts are on the Supplement Facts panel on your bottle.
- Vitamin B3 (Niacin)A vasodilator B vitamin. Niacin is involved in the release of nitric oxide, which lets vessel walls relax.
- ZincAn essential mineral tied to normal testosterone levels and reproductive function in men.
- L-CitrullineAn amino acid the body converts to arginine, the raw material for nitric oxide production.
- L-CarnitineShuttles fatty acids into the mitochondria, where muscle cells turn them into usable energy.
- Maca Root ExtractA Peruvian root used traditionally for stamina, drive and a steadier mood.
- Pine Bark ExtractA polyphenol source studied for its effect on endothelial function and circulation.
- Grape Skin ExtractCarries resveratrol and related polyphenols that act as antioxidants in vascular tissue.
- Saffron ExtractA spice extract used for mood, libido and stress-related fatigue.
At a glance
SteelPower product details
| What it is | A once-daily dietary supplement for male performance, endurance and circulation support |
|---|---|
| Form | Capsule, easy to swallow, no flavour, no chewing |
| Serving size | 1 capsule daily with water |
| Capsules per bottle | 30 capsules, a 30-day supply |
| Key actives | Vitamin B3 (niacin), zinc, L-citrulline, L-carnitine, maca root extract, pine bark extract, grape skin extract, saffron extract |
| Best for | Men over 18 who want daily support for stamina, blood flow and drive |
| Price from | $49 per bottle on the 6-bottle supply ($294 total). Starter supply is $79 per bottle. |
| Guarantee | 60 days, money back, no empty-bottle rule |
| Made in | The USA, in an FDA-registered cGMP facility |
| Where to buy | Only on this site, steelpowercaps.com. Not in stores, not on Amazon. |
The straight answer
SteelPower in four sentences
SteelPower is a once-daily capsule for men that supports blood flow, endurance and sexual performance using eight actives, led by L-citrulline for nitric oxide production and zinc for normal testosterone levels. Each bottle holds 30 capsules, one month of use, and it is made in the USA in a cGMP facility. It is sold only here at steelpowercaps.com, from $49 a bottle on the 6-bottle supply, with free U.S. shipping on 3 bottles and up. Every order is covered by a 60-day money-back guarantee, so the first two months are effectively a trial.
How to take it
Three steps, then forget about it
One capsule, one glass of water
Take a single SteelPower capsule daily with water. Do not double up to catch up on a missed day.
Same time every day
Most men take it with breakfast. Morning or evening matters less than consistency, because nitric oxide support builds with steady daily intake.
Give it 3 to 4 weeks
Some men notice something in the first fortnight. The biggest group in our review data reports a change in week 3 or 4.
If you take nitrates, blood pressure medication or anything for your heart, ask your doctor first.
Customer feedback
4.68 out of 5 from 2,183 written reviews
17,264 men have ordered SteelPower from this store since 2019, and 91 percent of reviewers say they would recommend it. Feedback below is trimmed for length, never for meaning.
Six bottles in and the difference is not subtle. More energy in the evening, better staying power, and no crash the next day.
Took about three weeks before I noticed anything, then it clicked. One capsule with breakfast and I forget about it for the rest of the day.
Works for me on endurance. I did wish the two-bottle pack came with free shipping, so I moved up to three and it paid for itself.
Read all 2,183 SteelPower reviews, including the three-star ones.
Straight questions
SteelPower questions men ask before ordering
What is SteelPower?
SteelPower is a once-daily dietary supplement capsule for men, made in the USA, that supports blood flow, endurance and sexual performance. Each bottle holds 30 capsules and contains eight actives: vitamin B3, zinc, L-citrulline, L-carnitine, maca root, pine bark, grape skin and saffron extract. It is not a drug and it needs no prescription.
Where can I buy SteelPower?
Only here, on steelpowercaps.com. We ship every bottle ourselves from one U.S. warehouse. SteelPower is not stocked in pharmacies or supermarkets, and it is not listed on Amazon, Walmart or eBay. Selling direct is how we keep the price at $49 a bottle on the larger supplies and how we can honour a 60-day guarantee on a product that left our own shelf.
Is SteelPower legit?
Yes. SteelPower is sold by Foundry Row Nutrition, LLC in Boise, ID, made in an FDA-registered cGMP facility, with the full ingredient list on this site and a 60-day refund window in our written policy. What it is not is a medicine. If a page promises a cure, that page is not us.
How long does SteelPower take to work?
Give it 3 to 4 weeks. Twenty-two percent of reviewers report a first change inside two weeks, 41 percent between week 3 and week 4, and the rest later. Circulation support is cumulative, which is exactly why the 3 and 6 bottle supplies exist.
How much does SteelPower cost?
$158 for 2 bottles ($79 each), $207 for 3 bottles ($69 each) with free shipping and a bonus guide, or $294 for 6 bottles ($49 each) with free shipping, two bonus guides and the VIP bonus. One payment, no subscription.
More answers on the SteelPower questions page.
60
Sixty days to decide. Not sixty days to argue.
Take SteelPower for two months. If your performance, endurance or mood has not moved the way you hoped, email us from the address you ordered with and ask for your money back. No empty-bottle rule, no restocking fee, no script to sit through.
Ready when you are
Order SteelPower direct
Same prices, no middleman. Pay once, and the guarantee runs 60 days from delivery.
- 60-day guarantee
- Free shipping on 3+
- Third-party tested
- Non-GMO
What to remember
Five things worth keeping in mind
- SteelPower is one capsule a day, 30 capsules a bottle, for men over 18.
- The formula leads with L-citrulline for nitric oxide support and zinc for normal testosterone levels.
- It is sold only on steelpowercaps.com, from $49 a bottle, with free U.S. shipping on 3 or more.
- Every order is covered for 60 days, refund by email, no empty bottles required.
- Most men who see a change report it between week 3 and week 4, so plan for at least a 90-day run.
Sources
Where the background reading comes from
The mechanism section cites public health sources so you can check the ingredient science yourself.
Selected sources
- Niacin: Fact Sheet for Consumers. National Institutes of Health, Office of Dietary Supplements.
- Zinc: Fact Sheet for Consumers. National Institutes of Health, Office of Dietary Supplements.
- Carnitine: Fact Sheet for Health Professionals. National Institutes of Health, Office of Dietary Supplements.
- Citrulline research summary. Examine.com.
- Dietary Supplements. MedlinePlus, U.S. National Library of Medicine.
Last updated: July 2026