Horsewood Ingredients, One at a Time
Seven botanicals, seven separate questions. This page takes each one on its own terms — what it is, what the research measured, what dose the studies used, and whether the amount in a capsule can plausibly do the same thing.
Quick Answer: What Is in Horsewood?
Seven ingredients: tongkat ali, horny goat weed, saw palmetto, wild yam, sarsaparilla, nettle leaf and boron. Two of them — tongkat ali and boron — have genuine human trial data behind them. One, saw palmetto, has been tested thoroughly and the largest trial was negative. The remaining four rest on laboratory mechanism or traditional use. That is a normal profile for a botanical blend, and knowing which is which is the whole point of this page.
- Grade A (human trials): tongkat ali, boron
- Grade B (mechanism or mixed): horny goat weed, saw palmetto
- Grade C (traditional): nettle leaf, wild yam, sarsaparilla
The Seven, in Order of Evidence
Strongest first, not label order.
Tongkat Ali
Eurycoma longifolia · root extractA Southeast Asian shrub whose root has been used traditionally for fatigue. The modern supplement is a standardised water extract, usually labelled 100:1 or 200:1.
What was measured: a placebo-controlled trial in 63 moderately stressed adults found roughly a 16% fall in cortisol and improvements in tension, anger and confusion after four weeks at 200 mg daily.
The catch: small sample, four weeks, one specific extract. Testosterone effects appear mainly in men whose levels were already low.
Grade A · human trialsBoron
Mineral · usually a citrate or glycinate chelateA trace mineral from fruit, nuts and vegetables. Most people get 1–3 mg daily from food without trying.
What was measured: 10 mg daily for a week raised free testosterone and lowered oestradiol in healthy men. The mechanism appears to be less testosterone bound to SHBG rather than more produced.
The catch: days-long studies with small samples, and nobody measured whether participants felt different. Safe below 20 mg/day; do not stack products containing it.
Grade A · human trialsHorny Goat Weed
Epimedium · standardised for icariinThe active compound, icariin, inhibits PDE5 in laboratory assays — the same enzyme family targeted by prescription erectile-dysfunction drugs.
What was measured: enzyme inhibition in vitro, and effects in animal models. That is a real finding about the molecule.
The catch: the concentrations used in a test tube are far above what a daily capsule delivers to tissue. Treat this as a mechanism that might apply, not an effect that has been shown in people.
Grade B · mechanism onlySaw Palmetto
Serenoa repens · lipidosterolic extractThe most thoroughly tested botanical in the formula, and the one whose results are clearest — in the unhelpful direction.
What was measured: the CAMUS trial randomised 369 men and escalated the dose to triple the usual 320 mg over 72 weeks. No significant improvement in urinary symptoms over placebo at any dose.
The catch: it can lower a PSA reading, which matters if you are being monitored. Tell your doctor you take it.
Grade B · well tested, negativeNettle Leaf
Urtica dioica · leafCommonly paired with saw palmetto in prostate formulas, on the theory that the two act on related pathways.
What was measured: most of the prostate research used nettle root, not leaf. The leaf has separate traditional use for joint and allergy complaints.
The catch: a formula listing leaf is not supported by root research, and the distinction is rarely made on labels.
Grade C · limitedWild Yam
Dioscorea villosa · rootContains diosgenin, which chemists use as a starting material to synthesise steroid hormones in a laboratory.
What was measured: the laboratory conversion, which is genuine chemistry.
The catch: the human body does not perform that conversion. Eating diosgenin does not produce hormones inside you, and this is one of the most persistent misunderstandings in supplement marketing.
Grade C · traditionalSarsaparilla
Smilax · rootA long history of folk use as a tonic, and a former flavouring for soft drinks.
What was measured: very little in modern humans at supplement doses.
The catch: it contains plant sterols that are sometimes described as hormone precursors. As with wild yam, that is chemistry rather than physiology.
Grade C · traditionalResearch Doses vs What a Capsule Delivers
The single most useful table on this page. If a formula's amount is far below the studied dose, the research cited for it does not transfer.
| Ingredient | Dose used in research | What to check on the label |
|---|---|---|
| Tongkat ali | 200–400 mg/day standardised extract | Both the milligrams and the extract ratio (100:1 vs raw powder) |
| Boron | 3–10 mg/day | Elemental amount; upper safe limit ~20 mg/day |
| Saw palmetto | 320 mg/day lipidosterolic | Whether it is the lipidosterolic extract or dried berry |
| Horny goat weed | No established human dose | Icariin percentage, if stated at all |
| Nettle | ~360 mg/day (root, for prostate) | Root or leaf — they are not interchangeable |
| Wild yam | None established | Present for tradition rather than dose |
| Sarsaparilla | None established | Present for tradition rather than dose |
If the label shows one blend total instead of per-ingredient amounts, none of the comparisons above are possible. Ingredients within a blend are listed heaviest first, so the ordering tells you a ranking — but not the gap between first and last, which is where the entire question lives.
Interactions and Safety
Botanicals are not inert, and this is the section most review pages leave out. None of the following is exotic — each is a documented, plausible interaction worth a two-minute conversation with a pharmacist.
Ask a doctor first if you take
- Nitrates — the icariin/PDE5 overlap makes this the interaction that genuinely matters
- Blood thinners — several of these botanicals have antiplatelet activity
- Blood-pressure medication — additive hypotensive effects are plausible
- Diabetes medication — tongkat ali may affect blood glucose
- Hormone therapy — boron alters oestradiol metabolism
Practical cautions
- PSA testing — saw palmetto can lower the reading and mask a change
- Stacking — boron appears in many men's formulas; two or three together can approach the 20 mg limit
- Sourcing — heavy-metal contamination has been found in unregulated tongkat ali supplies, which is an argument for inspected facilities
- Expectations — nothing here acts within hours
This is information, not medical advice. Erectile dysfunction and clinically low testosterone are medical conditions with real diagnostic pathways — and ED in particular can be an early cardiovascular warning sign. Neither should be self-treated with a supplement.
Pricing
Set by the official store and subject to change. We are not the merchant.
Struck-through figures are the merchant's stated full prices. We cannot verify how long anything sold at those prices, so read them as the seller's claim rather than a checked fact. All packs carry the same 60-day money-back guarantee, administered by the merchant.
Ingredient Questions
Why are the ingredients not listed in evidence order on the bottle?
Labels list ingredients by weight, heaviest first, because that is what regulation requires. Evidence quality and quantity are unrelated — the ingredient with the best research can easily be the smallest component. That mismatch is why this page reorders them.
Does wild yam really do nothing?
It does nothing hormonal. Diosgenin is a genuine industrial precursor for synthesising steroids in a laboratory, but the human body has no pathway to perform that conversion. Wild yam may have other traditional uses; producing hormones inside you is not one of them.
Is nettle root the same as nettle leaf?
No, and it matters. Most of the prostate research used the root. The leaf is a different preparation with a different traditional use. A label saying "nettle leaf" is not backed by root studies, and few products make the distinction clear.
What does a 100:1 extract mean?
That 100 parts of raw plant material were concentrated into one part of finished extract. It matters because trials used standardised extracts at specific ratios — 200 mg of a 100:1 extract and 200 mg of raw root powder are entirely different products at identical stated weights.
Can I just take tongkat ali on its own?
You can, and if the energy and stress data is what attracts you, a single-ingredient product lets you see the dose you are getting. The argument for a blend is convenience and the possibility that the ingredients complement each other — which sounds reasonable and has not been tested for this formula.
Do the bonuses affect the ingredients?
No. The three digital bonuses included with the six-bottle pack are educational PDFs — a routine guide, a recipe collection and a habits guide. They are separate from the supplement and change nothing about what is in the capsule.
Check Current Horsewood Pricing
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