Boron

You can find Boron in:

Norateen Nitro

Norateen PRO

Boron: the trace mineral for free testosterone and hormone balance

Boron is an essential dietary trace mineral (element 5, atomic mass 10.81) that most people under-consume — typical diets supply only 1–1.5 mg per day. At supplemental doses it behaves as a natural hormone optimiser, with a small but consistent body of human research behind its effects on free testosterone, estrogen and inflammation.

Mechanism of action: freeing bound testosterone

Most of the testosterone circulating in your blood isn't actually available to your tissues — roughly 60% is bound to a carrier protein called sex-hormone-binding globulin (SHBG), which takes it out of active circulation. Only the "free" fraction can enter cells and act. Boron's signature effect is to lower SHBG, releasing more free, bioavailable testosterone without needing to increase total production. In parallel it lowers estradiol (a form of estrogen) and reduces inflammatory signalling (Naghii et al., 2011; Pizzorno, 2015).

The pathway can be summarised as: boron → ↓ SHBG → ↑ free testosterone, ↓ estradiol and ↓ inflammatory markers.

What the research shows

In the most-cited trial, healthy men took 10 mg of boron per day for one week. The results were significant on several fronts (Naghii et al., 2011):

• Free testosterone rose ~28%, from an average of 11.83 to 15.18 pg/mL.
• Estradiol fell ~39%, from 42.33 to 25.81 pg/mL.
• Inflammation dropped sharply — high-sensitivity CRP fell by roughly half, with reductions also seen in IL-6 and TNF-α.

Boron additionally supports vitamin-D status and bone health by influencing calcium and magnesium metabolism and the activity of vitamin D (Nielsen, 2014; Rondanelli et al., 2020), and earlier work found dietary boron raised both estradiol and testosterone in postmenopausal women (Nielsen et al., 1987).

Key facts at a glance

• What it is: boron, an essential dietary trace mineral (element 5).
• Free testosterone: +28% in one week at 10 mg/day (Naghii 2011).
• Estrogen: estradiol reduced 39% vs baseline (Naghii 2011).
• Inflammation: hs-CRP reduced ~50%; IL-6 and TNF-α also lowered.
• Mechanism: lowers SHBG to free bound testosterone; supports vitamin D and bone.
• Dose used in trials: 3–10 mg/day.

Full scientific references

1. Naghii MR, Mofid M, Asgari AR, Hedayati M, Daneshpour MS. Comparative effects of daily and weekly boron supplementation on plasma steroid hormones and proinflammatory cytokines. Journal of Trace Elements in Medicine and Biology. 2011;25(1):54–58.
2. Pizzorno L. Nothing boring about boron. Integrative Medicine (Encinitas). 2015;14(4):35–48.
3. Nielsen FH, Hunt CD, Mullen LM, Hunt JR. Effect of dietary boron on mineral, estrogen, and testosterone metabolism in postmenopausal women. FASEB Journal. 1987;1(5):394–397.
4. Nielsen FH. Update on human health effects of boron. Journal of Trace Elements in Medicine and Biology. 2014;28(4):383–387.
5. Naghii MR, Samman S. The effect of boron supplementation on its urinary excretion and selected cardiovascular risk factors in healthy male subjects. Biological Trace Element Research. 1997;56(3):273–286.
6. Rondanelli M, Faliva MA, Peroni G, et al. Pivotal role of boron supplementation on bone health: a narrative review. Journal of Trace Elements in Medicine and Biology. 2020;62:126577.

Boron optimises hormones by lowering SHBG and estradiol; it has not been shown to directly increase muscle mass or strength. This information is educational and describes the ingredient's physiology and the findings of published research; it is not a therapeutic or medical claim. Individual results vary.