Does Boron Raise Testosterone? What the Evidence Shows
The evidence is thin. One study gave 8 men 10 mg of elemental boron a day for 1 week, and free testosterone rose, but it had no comparison group. The adult upper limit is 20 mg of elemental boron a day. Horsewood lists 20 mg of boron chelate without stating the elemental amount.
What is boron, and how much do men already get?
Boron is a trace mineral that most people get from food. US adults take in about 1 mg a day from their normal diet (NIH ODS, 2022).
Your body needs only tiny amounts of trace minerals. Boron has no official daily requirement, so labels mark it with a dagger instead of a percent.
Boron shows up in men’s blends because of one hope: that it nudges testosterone. The rest of this post looks at how well that hope holds up.
Does boron raise testosterone? The short answer
Maybe, but the proof is very thin. The main human study gave 8 men 10 mg of boron a day for 1 week, and their free testosterone rose (Naghii et al., 2011).
That is a real finding, yet it rests on a very small base. There was no comparison group, so no one can say the pill caused the change.
Why boron still gets so much attention
Boron is cheap, and a hormone result is easy to quote on a label or ad. The small print about study size rarely comes along with it.
Larger trials with a placebo group would be needed to confirm the finding. Until then, any promise of higher testosterone from boron goes further than the data.
What did the boron testosterone study test?
The study tested whether a week of boron changed hormone levels in healthy men. It measured blood markers before and after.
The table sets out the details that matter most when you judge a study.
| Study detail | Naghii et al., 2011 | Why it matters |
|---|---|---|
| Daily dose | 10 mg of elemental boron | Elemental means the boron itself, not a compound |
| Length | 1 week | Too short to show a lasting effect |
| People | 8 men | Small groups swing easily by chance |
| Comparison group | None | No way to rule out other causes |
| Main result | Free testosterone rose | A blood marker, not a felt benefit |
Notice the dose line. The study counted elemental boron. That detail comes back when we look at the Horsewood label.
Why one small boron study is not enough
One small study cannot settle a question on its own. Results from 8 people over 1 week often fail to repeat in larger trials.
Here are the four gaps in plain terms.
Too few men
Eight people is a pilot size. One or two unusual results can move the average.
Too short
One week shows a quick blood change at best. It says nothing about months of use.
No placebo
Without a dummy-pill group, diet, sleep or chance could explain the rise.
Free, not total
Free testosterone is the small share not bound to blood proteins. It is one marker among several.
None of this means boron does nothing. It means the evidence is too weak to promise anything.
How much boron is in Horsewood?
Horsewood lists 20 mg of boron amino acid chelate in each 2-capsule serving. The label does not say how much elemental boron that holds.
A chelate is boron bound to an amino acid. The 20 mg weight covers both parts. So the real boron inside is less than 20 mg, by an amount the label leaves out.
| Source | Boron amount | Type of number |
|---|---|---|
| Normal US diet | About 1 mg a day | Elemental boron |
| Naghii study dose | 10 mg a day | Elemental boron |
| Adult upper limit | 20 mg a day | Elemental boron, all sources |
| Horsewood (per serving) | 20 mg of chelate | Compound weight; elemental not stated |
Because the units differ, you cannot say whether Horsewood gives more or less boron than the study. That is a gap worth knowing about. The full panel is on the Horsewood Supplement Facts page.
See every amount in Horsewood before you buy
Seven actives, 118 mg per serving, 60 capsules a bottle and a 60-day money-back window. Questions? Call +1 (302) 200-3480.
What is the safe upper limit for boron?
The upper limit for adults is 20 mg of elemental boron a day from all sources (NIH ODS, 2022). That total includes food, multivitamins and every supplement you take.
A 20 mg chelate cannot hold more than 20 mg of boron, so Horsewood alone sits below that line. The risk comes from stacking.
Why stacking is easy to miss
Many men’s formulas list boron, often as a chelate or citrate with no elemental figure. Two or three products can add up fast. When a label gives only a compound weight, ask the maker for the elemental amount.
Does Horsewood claim to raise testosterone?
No. Horsewood’s label claims are support for healthy blood flow and male response, libido and desire, and mental clarity. Testosterone is not on that list.
Boron is one of seven actives. The others include saw palmetto, wild yam, sarsaparilla, nettle leaf, tongkat ali and horny goat weed.
Tongkat ali is the other herb often tied to testosterone. Our post on tongkat ali doses explained shows how Horsewood’s 10 mg compares with study doses.
Most of those amounts are small next to the doses used in research. The Horsewood ingredients page walks through all seven.
How to check boron on the Horsewood label or any other
Look for the form, the weight and whether an elemental amount is given. Those three details tell you how a label lines up with the research.
Use these steps on any men’s blend or multivitamin that lists boron.
Find the form
Boron is sold as a chelate, citrate, glycinate or similar compound. The label should name it.
Read the weight
Note the milligrams next to it, and check whether they refer to the compound or the boron itself.
Look for “elemental”
A clear label says how much elemental boron the compound gives. If it does not, the real amount is unknown.
Add up your products
Total the boron across every supplement you take and keep it under the 20 mg daily limit.
Horsewood passes the first two steps and misses the third. The form and weight are printed, but the elemental figure is not. You can ask the order desk at +1 (302) 200-3480, though no figure has been published.
Should you check your testosterone before trying boron or Horsewood?
Yes, if low testosterone is your worry. Only a blood test ordered by a doctor can tell you where your level stands.
Symptoms such as low energy or low drive have many causes. A supplement cannot sort those out for you.
Before buying any blend, learn to read the panel. Our guide on how to read a men’s supplement label shows what to look for, from amounts to red flags.
Boron and testosterone: common questions
Does boron raise testosterone?
The evidence is thin. One study of 8 men found free testosterone rose after 1 week of 10 mg of boron a day, but it was tiny, short and had no comparison group.
How much boron do people get from food?
US adults get about 1 mg of boron a day from food, according to the NIH Office of Dietary Supplements.
What is the upper limit for boron?
The upper limit for adults is 20 mg of elemental boron a day from all sources. That includes food, multivitamins and any other supplements.
How much boron is in Horsewood?
Horsewood lists 20 mg of boron amino acid chelate per 2-capsule serving. The label does not say how much elemental boron that chelate provides.
What is a boron amino acid chelate?
It is boron bound to an amino acid. The listed weight covers both parts, so the boron inside is less than the full 20 mg.
Does Horsewood claim to raise testosterone?
No. Horsewood’s label claims cover blood flow and male response, libido and desire, and mental clarity. Testosterone is not among them.
