Steel Power Ingredients Analyzed: What the Label Actually Contains

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Why This Ingredient Analysis Starts With the Label Discrepancy

The most important thing to establish before analyzing Steel Power's ingredients is which ingredients are actually in the product. That requires going further than the marketing copy — because the marketing copy and the verified label are not the same.

The “Our Ingredients” section of the Steel Power website lists six featured ingredients with descriptions: L-Citrulline, L-Carnitine, Pine Bark Extract, Maca Root Extract, Tribulus Terrestris, and Panax Ginseng. The FAQ section of the same website — specifically answering “What ingredients are in Steel Power?” — lists a different set: Vitamin B3 (Niacin), Zinc, L-Citrulline, L-Carnitine, Maca Root Extract, Pine Bark Extract, Grape Skin Extract, Saffron Extract. A March 2026 GlobeNewswire report documenting the Steel Power formula confirms the FAQ version and adds label quantities: Vitamin B3 (Niacin) 20mg, Zinc (as Zinc Oxide) 11mg, and a 570mg proprietary blend of the six botanical and amino acid ingredients listed in the FAQ.

Tribulus Terrestris and Panax Ginseng: not on the verified label. Grape Skin Extract and Saffron Extract: on the verified label, not mentioned in the marketing “Ingredients” section. This article evaluates what is confirmed to be in the capsule. For the full review of the product including pricing, guarantee, and kidney-aware considerations, see our Steel Power male enhancement review.

These statements have not been evaluated by the Food and Drug Administration. This content is for educational purposes only and does not constitute medical advice. Always consult your nephrologist or healthcare provider before starting any new supplement.

Vitamin B3 (Niacin) — 20mg — Individually Dosed

Niacin is a water-soluble B vitamin with well-established roles in cellular energy metabolism (NAD+ synthesis), lipid processing, and circulation. At 20mg, Steel Power's niacin content is a moderate supplemental dose — well below therapeutic lipid-management doses (500mg–2000mg) but meaningful for baseline metabolic support.*

The circulatory relevance: niacin supports prostaglandin-mediated vasodilation and is involved in endothelial function. The flushing response — temporary skin warmth and redness — that niacin is known for occurs at higher doses but can occasionally appear at lower doses in sensitive individuals, particularly when taken on an empty stomach. At 20mg, flushing is uncommon but not impossible.

For the CKD population: nephrologists sometimes use niacin specifically in CKD and dialysis management contexts related to phosphate and lipid regulation. Men with CKD should flag any supplemental niacin sources to their care team, particularly if they are already on niacin-containing medications or have lipid management protocols in place.

Zinc (as Zinc Oxide) — 11mg — Individually Dosed

Steel Power's zinc content at 11mg matches the RDA for adult men — this is a replacement-level dose, not a pharmacological dose. Zinc Oxide is one of the lower-bioavailability zinc forms; more absorbable forms include zinc picolinate and zinc glycinate, but Zinc Oxide is widely used in supplements and remains an effective source when consumed regularly with food.*

The evidence base for zinc in male health is the most established of any ingredient in this formula. A 2022 systematic review in the Journal of Trace Elements in Medicine and Biology analyzed 38 papers and concluded that zinc deficiency reduces testosterone levels and that supplementation in deficient men improves testosterone concentrations. A landmark 1996 study by Prasad et al. found that zinc restriction in young men reduced testosterone by approximately 75% over 20 weeks, and that supplementation in zinc-deficient elderly men nearly doubled testosterone levels. The clinical implication is clear: zinc adequacy matters for male hormonal balance, and men who are zinc-deficient see the most significant benefit from supplementation. Men who are not deficient see more modest effects.*

Kidney-specific consideration: CKD alters trace mineral metabolism. Men on mineral-restricted protocols — particularly those with advanced CKD or those on dialysis — should confirm that supplemental zinc at 11mg fits within their individualized guidelines.

L-Citrulline — Dose Undisclosed (Part of 570mg Blend)

L-Citrulline is the circulatory cornerstone of the Steel Power formula. It is an amino acid that the body converts to L-Arginine — primarily via the renal tubules — and L-Arginine then serves as the substrate for nitric oxide synthase, producing nitric oxide (NO). NO relaxes blood vessel smooth muscle, producing vasodilation that improves blood flow, lowers vascular resistance, and supports tissue perfusion.*

The clinical research on L-Citrulline for physical performance is well-developed. A double-blind, randomized, placebo-controlled crossover study published in the Journal of the International Society of Sports Nutrition found measurable improvements in cycling performance in men taking 2.4g daily for 7 days. A 2014 study in the Journal of Applied Physiology found that L-Citrulline at 6g/day produced significant improvements in VO2 kinetics and reduced mean arterial blood pressure in healthy men. Across the research base, doses of 2.4g–6g are used in studies showing performance effects.*

The limitation here is direct: we cannot verify that Steel Power's proprietary blend contains L-Citrulline at research-relevant doses. Six ingredients share 570mg total. If each ingredient were represented equally, each would receive 95mg — far below the 2.4g minimum used in performance research. If L-Citrulline is the lead ingredient and receives the majority of the blend, doses could be higher. The label does not tell us. This is the practical limitation of proprietary blend formulation.

For the kidney-aware context on L-Citrulline — specifically its renal conversion pathway and its interaction with antihypertensive medications on blood pressure — see our Steel Power safety review.

L-Carnitine — Dose Undisclosed (Part of 570mg Blend)

L-Carnitine is a quaternary ammonium compound biosynthesized from lysine and methionine in the liver and kidneys. Its primary metabolic function is transporting long-chain fatty acids across the inner mitochondrial membrane for beta-oxidation — effectively serving as a cellular fuel carrier for energy production. This is relevant to physical endurance because sustained exercise depends on efficient fatty acid utilization.*

Clinical research on L-Carnitine in male reproductive health is well-supported. A systematic review published in Andrologia (2021) analyzing eight randomized controlled trials found that carnitine supplementation significantly improves sperm motility and morphology. Studies on carnitine for general male performance and energy are more mixed, with most positive findings at doses of 1g–3g daily — doses unlikely to be present in a sub-component of a 570mg proprietary blend.*

Kidney-specific note: L-Carnitine is synthesized in the kidneys, and carnitine deficiency is common in dialysis patients due to urinary losses. L-Carnitine replacement in dialysis patients is an established medical intervention. This does not mean the supplement dose in Steel Power functions as medical replacement therapy — it likely does not at a fraction of 570mg — but men on dialysis should disclose any carnitine-containing supplements to their care team.

Pine Bark Extract — Dose Undisclosed (Part of 570mg Blend)

Pine bark extract contains a class of polyphenols called proanthocyanidins, along with flavonoids and phenolic acids. Its vascular research profile is one of the stronger in the male performance supplement category, particularly in the standardized Pycnogenol form studied in controlled trials.

A double-blind, randomized, placebo-controlled study published in the Bratislava Medical Journal evaluated 120mg of Pycnogenol daily for three months in 53 men with erectile dysfunction. Results showed improved erectile function scores (measured by IIEF-5), reduced total and LDL cholesterol, and glycemic improvements in the diabetes subgroup. The proposed mechanism involves both enhanced endothelial NO production and antioxidant protection of the vascular lining from oxidative stress. A meta-analysis of L-Arginine and Pycnogenol for erectile dysfunction, published in Frontiers in Endocrinology (2023), supported these findings.* All research applies to the standardized, specified-dose Pycnogenol formulation — not to generic pine bark extracts at undisclosed doses.

Pine bark extract also has mild antiplatelet activity. Men on anticoagulant or antiplatelet medications should flag this to their prescriber.*

Maca Root Extract — Dose Undisclosed (Part of 570mg Blend)

Maca (Lepidium meyenii) is an Andean root vegetable with centuries of traditional use for vitality and fertility support. The clinical evidence base for maca's effects on male sexual desire is genuinely supportive, while the evidence for erectile function is more mixed.

The most relevant peer-reviewed data: a 12-week double-blind, placebo-controlled trial published in Andrologia found that men taking 1.5g–3g of maca root reported significantly greater increases in sexual desire compared to placebo, beginning at week 8. Critically, testosterone and other measured hormones showed no significant changes — suggesting maca works through non-hormonal mechanisms not yet fully elucidated. A separate RCT in 50 men with mild erectile dysfunction found self-reported improvements in sexual well-being after 12 weeks of 2.4g maca extract daily.* Both findings apply to specific doses that exceed what a sub-fraction of a 570mg blend likely delivers.

Grape Skin Extract — Dose Undisclosed (Part of 570mg Blend)

Grape skin extract provides resveratrol, quercetin, and proanthocyanidins. Resveratrol has been studied for cardiovascular protective effects including antioxidant activity, anti-inflammatory action, and support for endothelial function. For male health specifically, resveratrol's antioxidant properties may complement the NO-supporting effects of L-Citrulline by reducing oxidative degradation of nitric oxide.* The clinical evidence base for resveratrol at supplement doses is less consistent than for the other ingredients in this formula — benefits in human trials are generally more modest than animal research predicts.

Saffron Extract — Dose Undisclosed (Part of 570mg Blend)

Saffron extract is the most distinctive ingredient in Steel Power's verified formula and the one most absent from the marketing copy, which is notable given that saffron's research profile for male sexual health is specific and reasonably well-supported at clinical doses.

Saffron's active compounds — crocin and safranal — have been investigated in multiple peer-reviewed trials. A study published in Human Psychopharmacology found that saffron at 15mg twice daily for four weeks significantly improved erectile function scores in men with antidepressant-induced sexual dysfunction, compared to placebo. A 2009 pilot study found improvements in erectile events after just 10 days of 200mg saffron daily in men with erectile dysfunction. The mechanism appears to involve both nitric oxide pathway interactions and dopaminergic effects.* Clinical evidence is strongest for antidepressant-induced dysfunction and weaker for primary ED in otherwise healthy men.

For men considering Steel Power alongside antidepressant medications — particularly SSRIs — the saffron content is worth discussing with a prescriber, as saffron affects serotonin pathways.* See our safety review for more detail.

What the Ingredient Profile Tells Us Overall

The verified Steel Power formula tells a coherent formulation story: a nitric oxide support core (L-Citrulline + Pine Bark Extract) amplified by antioxidant protection (Grape Skin Extract + Pine Bark), adaptogenic vitality support (Maca Root), energy metabolism support (L-Carnitine), and foundational mineral support (Zinc). Saffron adds a less conventional but research-backed angle on sexual health. The formula holds together logically once you work from the verified label rather than the marketing copy.*

The persistent limitation is dose transparency. The research supporting each of these ingredients is dose-specific, and the proprietary blend structure prevents verification that any ingredient is present at a research-relevant level. This is a fair criticism of the formulation approach, not a disqualification of the formula itself — but it is the honest limitation that any thorough evaluation must acknowledge.

For how this formula compares with competitors on ingredient transparency and evidence backing, see our Steel Power comparison article. For the educational overview of how the nitric oxide pathway works and why it matters for male performance, see our nitric oxide and male performance guide. For other male wellness supplements reviewed on this site, see our coverage of Empower Health Labs Beyond Prostate and our testosterone booster comparison for men with kidney disease.

Frequently Asked Questions

What ingredients are actually in Steel Power?

The verified formula: Vitamin B3 (Niacin) 20mg, Zinc (as Zinc Oxide) 11mg, and a 570mg proprietary blend of L-Citrulline, L-Carnitine, Pine Bark Extract, Maca Root Extract, Grape Skin Extract, and Saffron Extract. The marketing section lists Tribulus Terrestris and Panax Ginseng, but neither appears on the verified Supplement Facts panel.

Does Steel Power disclose individual ingredient doses?

Only for Niacin (20mg) and Zinc (11mg). The six ingredients in the proprietary blend share a combined 570mg total, with no individual dose disclosure.

What does L-Citrulline do in Steel Power?

L-Citrulline is a nitric oxide precursor that converts to L-Arginine in the renal tubules and intestinal lining. L-Arginine supports nitric oxide production, which promotes vasodilation and blood flow. Research at 2.4g–6g daily shows measurable effects on circulation and exercise performance in healthy adults.*

Is there research supporting pine bark extract for male performance?

Yes. Pycnogenol, a standardized pine bark extract, was studied in a randomized controlled trial that found improvements in erectile function scores in men taking 120mg daily for three months. The proposed mechanisms include antioxidant protection of endothelial tissue and enhanced nitric oxide production.* Research applies to the standardized compound at specified doses.

Why does the Steel Power marketing page list ingredients that aren't on the label?

Tribulus Terrestris and Panax Ginseng appear in the marketing “Ingredients” section but are absent from the verified Supplement Facts panel. The company has not publicly explained the discrepancy. Buyers should use the Supplement Facts panel — not the marketing ingredient descriptions — as the authoritative source for what is actually in each capsule.

*These statements have not been evaluated by the Food and Drug Administration. This product is not intended to diagnose, treat, cure, or prevent any disease.