$44.99 $1.21 per serving
Product analysis
Steel-Libido RED may offer modest support for calm attention through theanine and ginkgo. Most forms and the proprietary blend contents are unspecified, making the complex combination hard to assess.
AI assessment of the formula, label and price. How scoring works
Nutrient Quality20
All listed forms are unspecified, so quality is difficult to judge across the combination. The unnamed proprietary blend adds uncertainty about the full contents.
Ingredient Transparency50
The listed amounts are stated, but ingredient forms are not disclosed. The proprietary blend also lacks individual component names, limiting a full comparison of the formula.
Value For Money31
The citrulline and theanine contributions compare poorly on price, while theobromine offers moderate value. Several other ingredients lack usable comparisons, leaving value for the whole combination uncertain.
Customer Satisfaction76
Customer feedback is generally positive across a substantial review pool. The volume gives a broad view of buyer satisfaction without establishing the intended benefits.
Product Focus27
Calm attention is the clearest supported role, with mixed evidence for ginkgo and theanine. The long ingredient list spans several goals without establishing a dependable improvement in everyday performance.
- Format
Softgel - Container
- 150 Softgel(s)
- Per serving
- $1.21
- Also available
Steel-Libido RED$24.99- Customer rating
- 4.4 · 1,292 ratings
Goals
Impact
High effect
Theanine · 100 mg
Theanine may modestly support selective attention, although standalone findings are mixed. Ginkgo has mixed acute cognitive findings that do not establish reliable sustained-focus improvement from a generic preparation. Theobromine is a mild methylxanthine, but the supplied evidence does not justify treating it as caffeine-equivalent attention support.
How this product is rated for Mental Focus
Ingredient fit59
Theanine, ginkgo and theobromine relate to the cognitive purpose, with limited acute-focus certainty. The declared amounts provide uneven coverage of the saved amount ranges; some contributions remain partial.
Goal fit
Theanine, ginkgo and theobromine relate to the cognitive purpose, with limited acute-focus certainty.
Dose adequacy
The declared amounts provide uneven coverage of the saved amount ranges; some contributions remain partial.
Pathways64
The saved findings emphasize cerebral energy and calm attention.
Depth
The saved findings emphasize cerebral energy and calm attention.
Breadth
Cerebral energy and calm attention reach the saved coverage threshold.
Evidence76
Theanine leads the saved finding, but its standalone attention evidence is mixed.
Evidence strength
Theanine leads the saved finding, but its standalone attention evidence is mixed.
Studied preparation
The saved preparation match is incomplete for theobromine.
Formulation logic91
Theanine lacks its caffeine partner in the supplied formula, so its standalone attention limitations remain relevant. No specified ingredient conflict was identified in the saved findings.
Partner coverage
Theanine lacks its caffeine partner in the supplied formula, so its standalone attention limitations remain relevant.
Conflicts
No specified ingredient conflict was identified in the saved findings.
Effective doses
All ingredients counted by this rule reach its minimum amount criterion; that threshold is not a clinically proven effective dose.
Theobromine Not classified
No linked studies yet.
Impact
Moderate effect
L-theanine may support calm attention, with limited evidence for an immediate benefit rather than long-term brain protection. The serving provides 100 mg. Ginkgo and ginseng have mixed or preparation-specific findings, so the blend offers no established broad cognitive enhancement or prevention of decline.
How this product is rated for Brain Health
Ingredient fit52
The saved findings recognize several relevant ingredients, alongside a broader set of actives that makes the formula less focused on brain health.
Goal fit
The saved findings recognize several relevant ingredients, alongside a broader set of actives that makes the formula less focused on brain health.
Dose adequacy
Declared amounts provide partial support against the saved benchmarks, rather than establishing a proven effective cognitive dose.
Pathways43
The saved findings concentrate on brain energy metabolism; this assigned connection is not proof of improved cognition. Only one assessed process reaches substantial coverage, leaving the overall connection narrow.
Depth
The saved findings concentrate on brain energy metabolism; this assigned connection is not proof of improved cognition.
Breadth
Only one assessed process reaches substantial coverage, leaving the overall connection narrow.
Evidence78
L-theanine leads the saved evidence comparison, with limited support for calm attention rather than sustained cognition or neuroprotection.
Evidence strength
L-theanine leads the saved evidence comparison, with limited support for calm attention rather than sustained cognition or neuroprotection.
Studied preparation
The included preparations are accepted in the saved findings, without implying a superior nutrient form or broad cognitive benefit.
Formulation logic100
No required ingredient partner is missing. No assessed ingredient conflict was found.
Partner coverage
Included ingredients have no required partner missing in the saved findings.
Conflicts
No assessed ingredient conflict was found.
Effective doses
All included ingredients meet the saved minimum amount for inclusion; this is not a universal effective cognitive dose.
Impact
Moderate effect
Theanine · 100 mg
Theanine at 100 mg provides a limited connection to sustained attention. Ginkgo at 120 mg is associated with mixed cognitive findings, so translating these ingredients into better everyday work output remains uncertain. The strongest saved mechanism concerns calm attention.
How this product is rated for Productivity Boost
Ingredient fit53
Only part of this broader formula aligns specifically with productivity support. The amounts provide partial alignment with the saved exposure comparison.
Goal fit
Only part of this broader formula aligns specifically with productivity support.
Dose adequacy
The amounts provide partial alignment with the saved exposure comparison.
Pathways40
The main saved contribution concerns calm attention. One mechanism has meaningful coverage; the contribution is concentrated rather than broad.
Depth
The main saved contribution concerns calm attention.
Breadth
One mechanism has meaningful coverage; the contribution is concentrated rather than broad.
Evidence74
Theanine provides the strongest assessed evidence contribution at its amount. The ingredients counted at adequate amounts match the saved preparation criteria.
Evidence strength
Theanine provides the strongest assessed evidence contribution at its amount.
Studied preparation
The ingredients counted at adequate amounts match the saved preparation criteria.
Formulation logic100
All 2 assessed ingredients meet the saved minimum amount comparison. No conflict was identified by the supplied ingredient checks.
Partner coverage
The assessed ingredients work independently or have their required partner.
Conflicts
No conflict was identified by the supplied ingredient checks.
Effective doses
All 2 assessed ingredients meet the saved minimum amount comparison.
Impact
Moderate effect
Citrulline · 1500 mg
Steel-Libido RED again lists 1,500 mg citrulline, which supports the nitric-oxide route in this comparison. The route remains below the level needed to count as covered, and its 100 mg theobromine is too low to count. Most other actives are outside this cardiovascular goal; these ingredients do not establish event prevention.
How this product is rated for Cardiovascular Support
Ingredient fit37
Citrulline is the main goal-linked ingredient; eight other active ingredients are outside the cardiovascular role described here.
Goal fit
Citrulline aligns with nitric-oxide function, but many other actives and several linked goals dilute focus.
Dose adequacy
Citrulline has a disclosed 1,500 mg serving amount; theobromine falls below its minimum comparison amount.
Pathways17
Citrulline contributes to endothelial nitric-oxide function, but the route remains below the level counted as covered.
Depth
Nitric-oxide function has partial support from citrulline, without reaching full pathway coverage.
Breadth
No target pathway reaches the level needed to count as covered.
Evidence79
Citrulline has the strongest evidence among the ingredients at relevant amounts, and its form is represented in studies.
Evidence strength
Citrulline has the strongest evidence here, but stronger evidence is available for another ingredient in this goal.
Studied preparation
Citrulline at a relevant amount uses a form represented in studies.
Formulation logic100
Citrulline works without a partner, and the saved ingredients match no cardiovascular conflict trigger.
Partner coverage
Citrulline works alone in the supplied profile.
Conflicts
The saved ingredients trigger no cardiovascular conflict penalty.
Effective doses
Citrulline reaches the minimum amount used here; theobromine does not.
Impact
Lower effect
Theanine Not classified
No linked studies yet.
Impact
Moderate effect
Theanine · 100 mg
Ginkgo extract at 120 mg offers tentative relevance to attention speed, while 100 mg L-theanine may support aspects of executive function. The theanine amount is below the 200 mg exposure in the supplied cognitive evidence, and the ginkgo extract is not identified as the preparation used in that evidence; benefits remain uncertain.
How this product is rated for Cognitive Support
Ingredient fit54
Ginkgo and theanine provide the main cognitive relevance within a formula containing several ingredients for other purposes. The ginkgo amount reaches the saved comparison level; theanine at 100 mg provides a partial exposure comparison.
Goal fit
Ginkgo and theanine provide the main cognitive relevance within a formula containing several ingredients for other purposes.
Dose adequacy
The ginkgo amount reaches the saved comparison level; theanine at 100 mg provides a partial exposure comparison.
Pathways40
Blood-flow-related support is the strongest assessed route, with a smaller stress and arousal contribution. Only the blood-flow-related route reaches the saved coverage level.
Depth
Blood-flow-related support is the strongest assessed route, with a smaller stress and arousal contribution.
Breadth
Only the blood-flow-related route reaches the saved coverage level.
Evidence71
Theanine provides the strongest saved evidence contribution at a counted amount, but the cognitive findings are limited. Theanine matches the assessed preparation category, while the ginkgo extract is not identified as the studied preparation.
Evidence strength
Theanine provides the strongest saved evidence contribution at a counted amount, but the cognitive findings are limited.
Studied preparation
Theanine matches the assessed preparation category, while the ginkgo extract is not identified as the studied preparation.
Formulation logic100
The counted ingredients can contribute independently or have their required partner. Both counted ingredients meet the saved minimum exposure comparison.
Partner coverage
The counted ingredients can contribute independently or have their required partner.
Conflicts
No configured ingredient conflict was identified in the saved assessment.
Effective doses
Both counted ingredients meet the saved minimum exposure comparison.
Impact
Lower effect
Theobromine Not classified
No linked studies yet.
Ingredients
| Ingredient | Amount per serving | Score |
|---|---|---|
Calories | 40 Calorie(s) | |
Total Fat | 2 Gram(s) | |
Total Carbohydrates | 1 Gram(s) | |
Protein | 4 Gram(s) | |
L-Citrulline | 1500 mg | |
Medium Chain Triglyceride Oil | 1000 mg | |
Pumpkin Oil | 1000 mg | |
Velvet Bean extract | 400 mg | |
Ginkgo extract | 120 mg | |
L-Theanine | 100 mg | |
Theobromine | 100 mg | |
Asian Ginseng extract | 80 mg | |
Cayenne powder | 60 mg | |
Superoxide Dismutase | 50 mg | |
BioPerine Complex | 6 mg |
Theobromine · 100 mg OverallScore84
Each serving lists 100 mg of theobromine as a separate ingredient. The exact amount makes comparison straightforward, and a whole-product serving costs about $1.20.
How this ingredient is rated
Active Ingredient Quality & Bioavailability79
Theobromine has a separately listed amount, though the saved facts do not establish its purity. The evaluation also flags certain other ingredients.
Theobromine Purity and Standardization
Theobromine has a separately listed amount; that alone does not establish its purity.
Excipient Profile and Clean Label
The evaluation flags an artificial color, sweetener or hydrogenated oil; the saved facts do not identify which.
Dose, Safety & Label Transparency100
The exact 100 mg of theobromine per serving makes the amount straightforward to compare.
Theobromine Dosage Efficacy and Safety
Each serving provides 100 mg of theobromine.
Labeling Transparency and Disclosure
The exact amount of theobromine is given as 100 mg per serving.
Value60
A whole-product serving costs about $1.20 and contains 100 mg of theobromine.
Price Per Serving Efficiency
The price is about $1.20 per whole-product serving.
Theanine · 100 mg OverallScore76
A serving provides 100 mg of L-theanine, an amount associated with relaxation and focus. The whole-product price equates to about $1.20 per 100 mg of theanine.
How this ingredient is rated
Active Ingredient Quality & Bioavailability80
The ingredient is identified as L-theanine. The saved facts do not establish a branded source or purity claim.
Isomer Specificity (L-Theanine)
The ingredient is identified as L-theanine, the L form.
Branded Forms & Purity Standards
The saved facts do not establish a branded source or a purity claim.
Dose, Safety & Label Transparency100
The 100 mg per serving is an amount associated with relaxation and focus. The amount and source are individually disclosed.
Theanine Dosage Efficacy
The 100 mg per serving is an amount associated with relaxation and focus.
Label Transparency & Blends
The saved label facts identify both the source and the 100 mg of theanine per serving.
Value20
The whole-product price works out to about $1.20 per 100 mg of theanine, which is high on this basis.
Price per 100mg L-Theanine
The whole-product cost is about $1.20 per 100 mg of theanine; that is high on this basis.
Citrulline · 1500 mg OverallScore62
A serving provides 1,500 mg of L-citrulline. The whole-product price works out to about $0.80 per gram of L-citrulline.
How this ingredient is rated
Active Ingredient Quality & Bioavailability70
The ingredient is listed as L-citrulline rather than a citrulline malate mixture. The evaluation flags additives, but the saved facts do not identify them.
Citrulline Form Specificity
The ingredient is listed as L-citrulline rather than a citrulline malate mixture.
Purity and Sourcing Markers
The evaluation flags additives, but the saved facts do not identify them.
Dose, Safety & Label Transparency85
A serving provides 1,500 mg of L-citrulline. The amount is individually listed.
L-Citrulline Dosage Efficacy
A serving provides 1,500 mg of L-citrulline.
Label Clarity and Transparency
The individual L-citrulline amount is recorded as 1,500 mg per serving.
Value0
The whole-product price works out to about $0.80 per gram of L-citrulline.
Price per Gram of L-Citrulline
The whole-product price works out to about $0.80 per gram of L-citrulline.
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Sources
Published studies used for the product analysis and the top-ranked studies for each ingredient and goal.
- Efficacy and adverse effects of ginkgo biloba for cognitive impairment and dementia: a systematic review and meta-analysis.
- Efficacy of Ginkgo biloba extract EGb 761® in dementia with behavioural and psychological symptoms: A systematic review.
- Ginkgo biloba extract EGb 761 is safe and effective in the treatment of mild dementia - a meta-analysis of patient subgroups in randomised controlled trials.
- Ginkgo biloba extract EGb 761® improves cognition and overall condition after ischemic stroke: Results from a pilot randomized trial.
- Ginkgo biloba extract EGb 761® in dementia with neuropsychiatric features: a randomised, placebo-controlled trial to confirm the efficacy and safety of a daily dose of 240 mg.
- Effects of L-Theanine Administration on Stress-Related Symptoms and Cognitive Functions in Healthy Adults: A Randomized Controlled Trial.
- A Randomized, Triple-Blind, Placebo-Controlled, Crossover Study to Investigate the Efficacy of a Single Dose of AlphaWave® L-Theanine on Stress in a Healthy Adult Population.
- Effects of Tea (Camellia sinensis) or its Bioactive Compounds l-Theanine or l-Theanine plus Caffeine on Cognition, Sleep, and Mood in Healthy Participants: A Systematic Review and Meta-Analysis of Randomized Controlled Trials.
- Assessing the effects of caffeine and theanine on the maintenance of vigilance during a sustained attention task.
- Effects of l-Theanine on Cognitive Function in Middle-Aged and Older Subjects: A Randomized Placebo-Controlled Study.
- Does l-citrulline supplementation and watermelon intake reduce blood pressure in middle-aged and older adults? A systematic review and meta-analysis of randomized controlled trials.
- Micronutrient Supplementation to Reduce Cardiovascular Risk.
- l-Citrulline supplementation improves O2 uptake kinetics and high-intensity exercise performance in humans.
- Effects of L-Citrulline Supplementation on Endothelial Function and Blood Pressure in Hypertensive Postmenopausal Women.
- Short-term effects of L-citrulline supplementation on arterial stiffness in middle-aged men.
- Effect of cocoa and theobromine consumption on serum HDL-cholesterol concentrations: a randomized controlled trial.
- The Effect of Theobromine Supplementation on HDL-c Subclasses (HDL-c2, HDL-c3), HDL-c2/HDL-c3 Ratio, and Gene Expression of PPAR-α and Sirt1 in Subjects With Metabolic Syndrome: A Randomized Controlled Clinical Trial.
- Relationships between consumption of theobromine in cocoa products and cardiovascular risk factors in 2015-2020 National health and nutrition examination survey.
- The acute effects on duodenal gene expression in healthy men following consumption of a low-fat meal enriched with theobromine or fat.
- Theobromine supplementation in combination with a low-calorie diet improves cardiovascular risk factors in overweight and obese subjects with metabolic syndrome: a randomized controlled trial.