Written & reviewed by HorseFil Reviews Editorial Team Updated July 2026 Affiliate disclosure: we earn a commission on qualifying purchases
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HorseFil Benefits, Graded

Seven advertised benefits, each rated against what published research on the ingredients actually supports — plus the side effects and interactions worth knowing.

Supplement benefit lists tend to be written by marketers. This one is graded. For each advertised benefit we state what the manufacturer claims, then what the evidence on the relevant ingredients actually supports — including where it does not.

1. Supports healthy testosterone levels

Evidence grade: moderate, population-dependent.

Tongkat Ali carries this claim and has genuine trial data behind it. The important qualification is who those trials studied: men with low baseline testosterone, older men, and men under sustained physical stress. In those groups, modest increases in free testosterone have been observed.

If your testosterone is already in the normal range, expect considerably less. And to be direct about scale — no botanical produces changes comparable to medical hormone therapy. If you suspect clinically low testosterone, that needs a blood test and a doctor, not a gummy.

2. Supports physical stamina and endurance

Evidence grade: strong for the ingredient, unknown for this product.

Beet root nitrate has solid, replicated evidence for improving exercise economy — the same effort costs less oxygen, so you last longer. This is one of the better-established findings in sports nutrition.

The qualifier is dosage. The trials use concentrated nitrate shots. Whether a gummy delivers anything comparable is the open question that runs through this entire product.

3. Supports healthy blood flow and circulation

Evidence grade: sound mechanism, dosage-dependent.

Covering both nitric oxide pathways — L-Arginine as direct precursor, dietary nitrate as the alternative route — is thoughtful formulation. Both are well characterised biochemically.

Worth knowing: improved circulation is a general cardiovascular effect, not a targeted one. It is also why the blood pressure interaction warnings on this page matter.

4. Supports libido and sexual wellness

Evidence grade: mixed.

Maca has the better case here — small randomised trials showing improvement in self-reported desire, apparently through a non-hormonal mechanism. Horny Goat Weed's case rests mainly on laboratory work that does not translate cleanly to supplement dosages.

To be explicit, because the marketing in this category often blurs it: this is not a treatment for erectile dysfunction. Persistent ED can be an early indicator of cardiovascular disease or diabetes and is worth investigating properly rather than self-treating with supplements.

5. Helps reduce fatigue and support natural energy

Evidence grade: reasonably supported.

This is where ashwagandha earns its place. The trial evidence on perceived stress, cortisol and sleep quality is the most consistent in the formula. The route to feeling more energetic here is indirect but real — better stress adaptation and better sleep produce better daytime energy without any stimulant effect.

What it will not do is feel like caffeine. If you are expecting a noticeable lift within an hour of taking it, you will be disappointed, and that is not a failure of the product.

6. Promotes mental clarity and stress balance

Evidence grade: reasonably supported.

Same evidence base as above. Ashwagandha's effects on perceived stress are its most replicated finding across randomised controlled trials.

7. Provides daily nutritional support

Evidence grade: true but not useful.

This claim is broad enough to be unfalsifiable and applies to essentially every supplement on the market. We include it because it appears in the marketing, but it should carry no weight in your decision.

What this product will not do

Being clear about limits is more useful than another benefit list:

  • It will not treat erectile dysfunction, clinically low testosterone, or any diagnosed condition.
  • It will not produce noticeable acute effects. Nothing here works within hours.
  • It will not compensate for poor sleep, poor diet or inactivity. Those factors dominate everything a supplement can contribute.
  • It will not work for everyone. Individual response to botanicals varies enormously, which is exactly why the 60-day guarantee exists.

Side effects and interactions

The ingredients are generally well tolerated, but "natural" is not a synonym for "harmless":

  • Ashwagandha — rare but documented liver injury cases; avoid with liver conditions and during pregnancy.
  • L-Arginine — can lower blood pressure; relevant if you take antihypertensives.
  • Horny Goat Weed — may interact with anticoagulants and blood pressure medication.
  • Beet root — harmless discolouration of urine or stool is common and expected.
  • Gummy format — check the sugar content if you manage blood glucose.

If you take any prescription medication, speak to a pharmacist or doctor before starting. They can check interactions against your specific prescriptions in a way a website cannot.

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