Home Ingredients EnoSTIM™ (Apple-Grape-Saffron for Male Sexual Health)
Men's HealthLibido Support

EnoSTIM™ (Apple-Grape-Saffron for Male Sexual Health)

Evidence Level
Limited
2 Clinical Trials
5 Documented Benefits
2/5 Evidence Score

EnoSTIM™ is a proprietary synergistic formulation developed by Nexira (France) for male sexual health — combining apple polyphenols, grape polyphenols, and saffron extract. Distinguished by NutraIngredients 'Ingredient of the Year' award (Healthy Aging category), 4-week clinical study showing 74% of men 45+ improved hardness scores, eNOS activation mechanism (up to 50% blood flow increase), and 74% reduction in oxidative stress. Used as natural alternative or adjunct for male sexual function, particularly for older men.

Studied Dose 600 mg/day (research-validated dose)
Active Compound Apple polyphenols + Grape polyphenols + Saffron extract (proprietary synergistic ratio)

Benefits

Male Sexual Performance / Hardness Score Improvement

Nexira 4-week trial in men aged 45+ showed 74% of volunteers improved their hardness score with EnoSTIM™ 600 mg/day. Validated questionnaires assessed outcomes. Established efficacy in target demographic.

Supported by Trial 1

Endothelial Nitric Oxide Synthase (eNOS) Activation

In vitro and ex vivo studies showed EnoSTIM™ activates eNOS — the enzyme producing nitric oxide for vasodilation. Increases blood flow up to 50%. Foundation mechanism for sexual performance application.

Supported by Trial 2

Oxidative Stress Reduction (74% Decrease)

In vivo study showed EnoSTIM™ scavenges free radicals, protecting NO action and decreasing oxidative stress 74%. Vascular oxidative stress is implicated in age-related erectile dysfunction.

Supported by Trial 2, Trial 1

Healthy Blood Flow Properties

Combined eNOS activation + oxidative stress reduction supports vascular function — relevant to: sexual performance, cardiovascular health, age-related vascular concerns.

Supported by Trial 2

Saffron Synergy for Sexual Health

Saffron has documented sexual health applications (some EFSA pending claims for erection improvement). Combined with polyphenols, theoretical synergistic effect.

Mechanism of action

1

eNOS Activation → Increased Nitric Oxide → Vasodilation

EnoSTIM™ activates endothelial nitric oxide synthase — increases NO production in vascular endothelium — vasodilation — increased blood flow. Essential mechanism for penile erection (filling of corpora cavernosa requires adequate blood flow). Same fundamental NO pathway as PDE5 inhibitors target downstream.

2

Antioxidant Protection of NO

NO is rapidly inactivated by reactive oxygen species in oxidative stress. EnoSTIM™'s antioxidant activity protects NO from degradation — enhances NO bioavailability and effects. Particularly relevant in older men where oxidative stress contributes to sexual dysfunction.

3

Apple + Grape Polyphenols

Combined polyphenol fraction provides antioxidant activity, vascular endothelial support, anti-inflammatory effects. Complementary mechanisms to saffron's serotonergic and circulatory effects.

4

Saffron Sexual Health Mechanism

Saffron has documented effects on sexual function via multiple pathways — neurotransmitter modulation, vascular effects, antidepressant effects (depression frequently underlies sexual dysfunction). Saffron has EFSA pending claim for erection improvement and muscle relaxation.

Clinical trials

1
EnoSTIM™ in Men 45+ — Nexira 4-Week Study
PubMed

Trial of EnoSTIM™ 600 mg/day in men aged 45 and over over 4 weeks.

Men aged 45+.

74% of volunteers improved their hardness score by week 4. Validated questionnaires used. Established efficacy in target demographic.

2
EnoSTIM™ eNOS Activation — In Vitro/Ex Vivo
PubMed

In vitro and ex vivo studies of EnoSTIM™ effects on eNOS activity and blood flow.

In vitro / ex vivo.

Activated eNOS; increased blood flow up to 50%. Established mechanism foundation.

Side effects and drug interactions

Common Potential side effects

Generally well-tolerated.
Mild GI distress (rare).
Headache rare.
Dizziness from vasodilation (rare).
Allergic reactions to ingredients rare.
Saffron-related cautions (Asteraceae family allergy).

Important Drug interactions

PDE5 inhibitors (sildenafil, tadalafil, vardenafil) — additive vasodilation; theoretical hypotension; consult prescriber.
Nitrates (nitroglycerin, isosorbide) — additive NO/vasodilation; theoretical severe hypotension; avoid combination.
Antihypertensives — additive BP reduction; modest concern.
Anticoagulants — theoretical antiplatelet effects from polyphenols; minor.
Antidepressants — saffron component has serotonergic activity; theoretical interaction.
Pregnancy — N/A (male product); consult for partner safety if relevant.

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Frequently asked questions about EnoSTIM™ (Apple-Grape-Saffron for Male Sexual Health)

What is EnoSTIM?

EnoSTIM™ is a proprietary synergistic formulation developed by Nexira (France) for male sexual health — combining apple polyphenols, grape polyphenols, and saffron extract.

What is EnoSTIM used for?

EnoSTIM is researched primarily for Men's Health and Libido Support. Nexira 4-week trial in men aged 45+ showed 74% of volunteers improved their hardness score with EnoSTIM™ 600 mg/day. Validated questionnaires assessed outcomes. Established efficacy in target demographic.

What is the recommended dosage of EnoSTIM?

The clinically studied dose is 600 mg/day (research-validated dose) Always follow the product label and check with a healthcare provider for personal advice.

Is EnoSTIM safe, and does it have side effects?

For most healthy adults, EnoSTIM is well tolerated at studied doses. Reported effects can include: Generally well-tolerated. Mild GI distress (rare). It may also interact with some medications. EnoSTIM is not right for everyone, so check with a healthcare provider first if you are pregnant or breastfeeding, have a medical condition, or take prescription medication.

Does EnoSTIM interact with any medications?

Possible interactions include: PDE5 inhibitors (sildenafil, tadalafil, vardenafil) — additive vasodilation; theoretical hypotension; consult prescriber. Nitrates (nitroglycerin, isosorbide) — additive NO/vasodilation; theoretical severe hypotension; avoid combination. If you take prescription medication, check with a pharmacist or doctor before using it.

How strong is the scientific evidence for EnoSTIM?

NutraSmarts rates the evidence for EnoSTIM as Limited (2 out of 5). It is backed by 2 clinical trials and 3 cited references summarized on this page. A higher rating reflects more, larger, and better-designed human studies.

References(3 citations)

Evidence ratings on NutraSmarts are based on the totality of human clinical research, with emphasis on randomized controlled trials, meta-analyses, and systematic reviews. The references below directly support claims made throughout this page.

  1. Modabbernia A, Sohrabi H, Nasehi AA, Raisi F, Saroukhani S, Jamshidi A, Tabrizi M, Ashrafi M, Akhondzadeh S Effect of saffron on fluoxetine-induced sexual impairment in men: randomized double-blind placebo-controlled trial. Psychopharmacology. 2012;223(4):381-388. doi: 10.1007/s00213-012-2729-6.PubMedUsed to support: RCT (n=36 men) showing saffron (Crocus sativus) 30 mg/day for 4 weeks significantly improved erectile function and intercourse satisfaction in men with SSRI-induced sexual dysfunction vs. placebo. Supports Male Sexual Performance / Hardness Score Improvement and Saffron Synergy for Sexual Health benefits; evidence is for saffron as an active component shared with EnoSTIM™, not for the EnoSTIM™ brand formulation specifically.
  2. Ranjbar H, Ashrafizaveh A Effects of saffron (Crocus sativus) on sexual dysfunction among men and women: A systematic review and meta-analysis. Avicenna Journal of Phytomedicine. 2019;9(5):419-427..PubMedUsed to support: Systematic review and meta-analysis confirming saffron supplementation significantly improved sexual function outcomes in both men (including erectile function) and women across multiple RCTs. Supports Male Sexual Performance and Saffron Synergy for Sexual Health benefits; evidence is for saffron as a component of EnoSTIM™, not the brand formula.
  3. Odai T, Terauchi M, Kato K, Hirose A, Miyasaka N Effects of Grape Seed Proanthocyanidin Extract on Vascular Endothelial Function in Participants with Prehypertension: A Randomized, Double-Blind, Placebo-Controlled Study. Nutrients. 2019;11(12). doi: 10.3390/nu11122844.PubMedUsed to support: RCT showing grape proanthocyanidin extract significantly improved flow-mediated dilation (endothelial function / nitric oxide pathway) vs. placebo in prehypertensive adults. Supports eNOS Activation, Healthy Blood Flow Properties, and Oxidative Stress Reduction benefits; evidence is for grape polyphenols as a component class shared with EnoSTIM™, not the EnoSTIM™ brand formula.