By CentreForMedicalHumanities.org Editorial Team | April 29, 2026
Editorial Disclosure: This article is for informational and educational purposes only and does not constitute medical advice. Always consult a qualified healthcare professional before starting any dietary supplement. These statements have not been evaluated by the Food and Drug Administration. Steel Power is not intended to diagnose, treat, cure, or prevent any disease. Individual results vary.
How to Read This Ingredient Breakdown
This article examines every ingredient in the Steel Power formula at the compound level — what published research shows about each one, what dosages have been used in clinical studies, and what the gap between research dosages and supplement dosages means for realistic expectations. It is written for men who want to do genuine due diligence before purchasing, not a surface-level ingredient rundown designed to validate a buying decision.
One framing note before the breakdown: Steel Power as a finished product has not been evaluated in published clinical trials. The research discussed here is ingredient-level science — it describes what individual compounds have been studied for, not what this specific formulation will deliver to any individual. That distinction is the honest foundation for everything that follows.
For the full product evaluation including pricing, guarantee, and purchase considerations, see: Steel Power Review 2026: What Men Should Know.
The Formula at a Glance
Per one capsule daily serving, Steel Power contains: Vitamin B3 (as Niacin) 20 mg, Zinc (as Zinc Oxide) 11 mg, and a Proprietary Blend of 570 mg total containing L-Citrulline, L-Carnitine, Pine Bark Extract (Pinus pinaster), Maca Root Extract (Lepidium meyenii), Grape Skin Extract (Vitis vinifera), and Saffron Extract (Crocus sativus). Capsule shell and excipients: Hypromellose (vegetable capsule), Microcrystalline Cellulose, Magnesium Stearate, Silicon Dioxide.
The formula divides into three structural tiers: disclosed nutrients (Niacin and Zinc with exact milligrams), a proprietary blend (six ingredients sharing 570 mg without individual disclosure), and excipients (inactive ingredients for capsule structure). The analysis that follows addresses each tier in the order it appears on the label.
Vitamin B3 (as Niacin) — 20 mg
Niacin is a water-soluble B vitamin with well-documented roles in cellular energy metabolism. Its primary mechanism involves its role as a precursor to NAD+ (nicotinamide adenine dinucleotide), a coenzyme essential to the electron transport chain and therefore to ATP production in every cell of the body. This is not speculative supplement science — it is basic biochemistry taught in every medical school curriculum.
What 20 mg means: At 125% of the daily value for adult men, this is a modest dose. The niacin flush reaction — temporary skin redness, warmth, and tingling — is the compound's most well-known side effect, but it is most commonly reported at doses of 50 mg and above for the immediate-release form. At 20 mg, most healthy adults experience no flush reaction. Niacin at pharmacological doses (1,000 mg and above) has been studied for cholesterol management, but that research is irrelevant to the 20 mg present in Steel Power, which functions as straightforward nutritional support.
Research dosage context: For basic nutritional support, 20 mg is appropriate and sufficient. For the cardiovascular or lipid-related outcomes sometimes associated with niacin, 20 mg is far below the dosages studied in clinical trials. The ingredient in Steel Power functions in the nutritional support category, not the therapeutic dose category.
Zinc (as Zinc Oxide) — 11 mg
Zinc is one of the most thoroughly researched minerals in male health, with documented roles in testosterone synthesis, sperm production and quality, immune function, and protein metabolism. A 2018 review in the Journal of Reproduction and Infertility confirmed zinc's essential role across multiple mechanisms in male fertility. A separate review in the International Journal of Molecular Sciences documented zinc's involvement in testosterone metabolism at the cellular level.
What 11 mg means: This equals 100% of the recommended daily value for adult men — full replacement of what optimal nutrition should provide. This is not a pharmacological dose; it is baseline nutritional coverage. Men who eat adequate shellfish, red meat, pumpkin seeds, and legumes are likely already meeting this requirement through diet. Men who don't — a significant subset of men over 40 eating typical Western diets — may benefit from the correction.
Form consideration: Zinc Oxide has lower bioavailability than alternative zinc forms, particularly zinc picolinate and zinc gluconate. Published research suggests absorption from zinc oxide is approximately 50% less efficient than from more bioavailable forms. This is a legitimate formulation note — not a disqualifying issue at 11 mg, but worth knowing if zinc status is a specific concern.
Who this matters for: The strongest evidence for zinc supplementation benefiting testosterone levels involves men who are zinc-deficient. For men with adequate zinc status, supplementation is unlikely to meaningfully alter testosterone. The honest position: if zinc deficiency is suspected, a serum zinc test through a healthcare provider is more informative than supplementation alone.
L-Citrulline — Proprietary Blend, Amount Undisclosed
L-Citrulline is listed first in the proprietary blend, which by convention indicates it is present in the largest amount among the six blend ingredients. It is an amino acid that the body converts to L-Arginine in the kidneys through the urea cycle. L-Arginine is then the direct substrate for endothelial nitric oxide synthase (eNOS), which produces nitric oxide — the vasodilating molecule central to healthy blood vessel function.
Why L-Citrulline over L-Arginine: Direct oral L-Arginine supplementation is significantly degraded by arginase in the gut and liver before reaching systemic circulation. L-Citrulline bypasses this first-pass degradation, converting to L-Arginine in the kidneys and achieving higher and more sustained plasma arginine levels. A study in the Journal of Nutrition confirmed this pharmacokinetic advantage. This is why well-formulated nitric oxide support supplements favor L-Citrulline — and why its presence in Steel Power's formula reflects current supplement science correctly.
Research dosage context: Published clinical studies on L-Citrulline for circulatory and exercise applications have typically used 1,000 mg to 6,000 mg daily, with some sports performance research using higher doses. The maximum L-Citrulline content in Steel Power — as the dominant ingredient in a 570 mg total blend — cannot exceed 570 mg and is likely considerably less when six ingredients share that total. This is a substantial gap from the dosages where the strongest circulatory research was conducted. It does not mean the ingredient is absent or ineffective at lower doses, but it does mean the research dosage comparison cannot be used to predict outcomes from this formulation.
L-Carnitine — Proprietary Blend, Amount Undisclosed
L-Carnitine is an amino acid derivative with a primary function in energy metabolism: it transports long-chain fatty acids across the inner mitochondrial membrane, enabling their oxidation for ATP production. In plain terms, it helps the body burn fat for energy at the cellular level. Secondary research has examined L-Carnitine in physical performance contexts, with some studies reporting improvements in exercise endurance and recovery markers.
Research dosage context: Published clinical research on L-Carnitine for physical performance has typically used 1,000 mg to 3,000 mg daily — significantly above what any fraction of a 570 mg shared blend can provide. The energy metabolism support from L-Carnitine in Steel Power's formula is likely nutritional rather than at the level where the strongest performance research was conducted.
Safety note: L-Carnitine is generally well-tolerated. Mild gastrointestinal effects including nausea or stomach discomfort are occasionally reported, particularly at higher doses. At the modest amounts present in Steel Power's blend, these effects are unlikely.
Pine Bark Extract (Pinus pinaster) — Proprietary Blend, Amount Undisclosed
Pine Bark Extract is rich in proanthocyanidins — oligomeric polyphenolic compounds with antioxidant activity. Its research relevance in male vitality formulas relates primarily to two mechanisms: antioxidant protection of nitric oxide (proanthocyanidins may help preserve NO from oxidative degradation, extending its vascular activity) and direct vascular support through anti-inflammatory pathways.
Combination research: Several published studies have examined pine bark extract specifically in combination with L-Arginine or L-Citrulline for circulatory applications. The combination is more extensively studied than pine bark extract in isolation for vascular applications, which is part of why these two ingredients frequently appear together in circulation-focused formulas.
Research dosage context: Studies have used 40 mg to 200 mg daily of standardized pine bark extract for vascular applications. These dosages are achievable within a multi-ingredient supplement context at the lower end of the range.
Medication interaction note: Pine bark extract has mild antiplatelet properties documented in published research. Men taking warfarin, aspirin therapy, or other anticoagulants should discuss pine bark extract with their healthcare provider before use. See our dedicated safety article: Steel Power Side Effects and Drug Interactions.
Maca Root Extract (Lepidium meyenii) — Proprietary Blend, Amount Undisclosed
Maca is a root vegetable native to the Peruvian Andes with centuries of traditional use for energy, stamina, and fertility support. It is classified as an adaptogen — a compound that supports the body's ability to manage physiological stress — rather than a compound with a single well-characterized biochemical mechanism.
Published evidence: A systematic review in BMC Complementary and Alternative Medicine evaluated available clinical trials and concluded that there was limited but suggestive evidence for positive effects on certain parameters of male health, while calling for larger controlled trials. A 2009 pilot study published in CNS Neuroscience and Therapeutics reported some favorable findings in men at dosages of 1,500 mg to 3,000 mg of raw maca equivalent daily. The evidence base supports cautious optimism rather than definitive claims.
Research dosage context: Clinical research has used 1,500 mg to 3,000 mg of raw maca root equivalent. Within a 570 mg shared blend, maca content is well below these dosages.
Safety note: Maca is generally well-tolerated. Men with thyroid conditions should consult a healthcare provider — maca contains glucosinolates that may affect thyroid function in sensitive individuals.
Grape Skin Extract (Vitis vinifera) — Proprietary Blend, Amount Undisclosed
Grape Skin Extract is a source of resveratrol and anthocyanins — polyphenolic antioxidants with an extensive cardiovascular research profile. The primary mechanism is antioxidant: grape-derived polyphenols reduce oxidative stress in vascular tissue, complementing pine bark extract's antioxidant contribution to the formula's overall vascular support approach.
Published evidence: Resveratrol research is extensive, with published studies examining cardiovascular health, endothelial function, and anti-inflammatory mechanisms. The clinical translation from laboratory research to human supplementation outcomes has proven more modest than early animal studies suggested — a pattern common in polyphenol research broadly.
Medication interaction note: Grape-derived polyphenols have mild antiplatelet properties relevant to men on blood thinners.
Saffron Extract (Crocus sativus) — Proprietary Blend, Amount Undisclosed
Saffron is listed last in the proprietary blend, indicating it is present in the smallest amount among the six blend ingredients. Small-scale published studies have examined saffron's potential effects on mood and male health, with some positive findings reported in trials using 15 mg to 30 mg daily. The proposed mechanism involves serotonin modulation — compounds in saffron may influence serotonin reuptake pathways.
Research dosage context: Published positive findings have used 15 mg to 30 mg daily. As the last-listed ingredient in a 570 mg shared blend, the saffron content is likely in the lower milligram range — potentially within or near the dosages where small-scale studies have been conducted, though exact amounts cannot be confirmed from the label.
Safety note: Saffron is generally well-tolerated at supplemental dosages. Very high doses (above 200 mg daily) have been associated with adverse effects in published literature — the amount present in Steel Power is almost certainly well below any concern threshold.
The Reference List Discrepancy
The Steel Power website lists fifteen scientific references. Cross-referencing these against the current Supplement Facts panel reveals a significant mismatch: several references cite research on Tribulus Terrestris, Chrysin, Icariin (Horny Goat Weed), Saw Palmetto, Chinese Hawthorn (Crataegus), and Cissus Quadrangularis. None of these compounds appear on the current product label.
The most likely explanation is a formula update — the reference list reflects a previous iteration of the formula that contained different ingredients. This is not uncommon in the supplement industry, where formulas are adjusted while marketing materials lag. It does mean that men who look up those specific studies to evaluate the product's scientific support are reviewing research on ingredients not present in what they are considering purchasing. The relevant science is the ingredient-level research for the eight compounds that are actually on the label: Niacin, Zinc, L-Citrulline, L-Carnitine, Pine Bark Extract, Maca Root Extract, Grape Skin Extract, and Saffron Extract.
The Proprietary Blend Question
The use of a proprietary blend is Steel Power's most significant transparency limitation from a research-evaluation standpoint. With six ingredients sharing 570 mg and no individual amounts disclosed, it is not possible to determine whether any single compound is present at a dosage supported by clinical research for the outcomes being marketed.
This is an industry-wide practice, not unique to Steel Power, and it reflects legitimate business reasons — primarily protecting formulas from being directly copied by competitors. But it places the burden of evaluation on the ingredient list as a whole rather than on individual dosage comparison. Men who require full-disclosure labeling to make purchase decisions should factor this into their evaluation. Men who are comfortable with ingredient-level rationale without exact dosage confirmation are in the target audience this formula is designed for.
Frequently Asked Questions
What are the ingredients in Steel Power?
Steel Power contains Vitamin B3 (Niacin) at 20 mg, Zinc (as Zinc Oxide) at 11 mg, and a 570 mg proprietary blend of L-Citrulline, L-Carnitine, Pine Bark Extract, Maca Root Extract, Grape Skin Extract, and Saffron Extract.
Does Steel Power use a proprietary blend?
Yes. The six botanical and amino acid ingredients share a 570 mg proprietary blend. Individual ingredient amounts are not disclosed, which limits comparison against published research dosages.
What does L-Citrulline do in Steel Power?
L-Citrulline converts to L-Arginine in the kidneys, supporting nitric oxide production and healthy blood vessel function. Published research has used 1,000 to 6,000 mg daily — substantially above what a 570 mg shared blend can deliver.
Why do some Steel Power website references cite ingredients not in the formula?
The website's reference list appears to reflect a previous formula iteration containing different ingredients. Men should evaluate the product based on the current Supplement Facts panel, not the website's reference list.
These statements have not been evaluated by the Food and Drug Administration. Steel Power is not intended to diagnose, treat, cure, or prevent any disease. Always consult a physician before starting any new supplement, especially if you have existing health conditions or take prescription medications.