Boron and Testosterone: What the Research Shows
Written by Gatis Strods, founder of TestoHit
TL;DR: Boron increases free testosterone levels by up to 28% in as little as one week. It works primarily by reducing Sex Hormone Binding Globulin (SHBG), the protein that "locks up" testosterone and makes it unavailable for your body to use.
Does Boron Increase Testosterone?
Boron can increase your free testosterone levels by around 28% while also reducing estrogen levels by 39%. These effects are due to boron's ability to lower the amount of Sex Hormone Binding Globulin (SHBG) in your blood.
Most of the testosterone in your body is not actually "active." Instead, it is bound to SHBG, which acts like a sponge, soaking up the hormone and keeping it from interacting with your cells. Only about 2% of your testosterone is "free" - meaning it is bioavailable and can actually build muscle, burn fat, and boost your libido. By reducing SHBG, boron allows more of your total testosterone to stay in this active, free state.
The Evidence for Boron and Testosterone
The most significant evidence for boron's effect on hormones comes from a study by Naghii et al. in the Journal of Trace Elements in Medicine and Biology (2011). In this study, eight healthy men took 10mg of boron every morning for one week. The results showed a 28.3% increase in free testosterone and a 9.6% decrease in SHBG. Interestingly, the study also found that estradiol (estrogen) decreased by 39.1% and the inflammatory marker CRP dropped by 50%.
Another earlier study by Nielsen et al. in the FASEB Journal (1987) established boron as a vital dietary mineral for steroid hormone metabolism. They found that a low-boron diet led to reduced testosterone levels, while supplementing with boron restored them. This suggests that boron is more than an "extra" supplement but a necessary mineral for a healthy hormonal environment.
How Boron Works Beyond SHBG
Boron doesn't just lower SHBG; it also helps the body use other vital nutrients like Vitamin D. Boron increases the biological half-life of Vitamin D by reducing the activity of the enzyme that breaks it down. Since Vitamin D is itself a pro-hormone that is essential for testosterone production, this creates a powerful synergistic effect.
Boron also reduces markers of inflammation like C-reactive protein (CRP) and tumor necrosis factor-alpha (TNF-alpha). Chronic inflammation is a known killer of testosterone production. When your body is in a state of high inflammation, it prioritizes the production of stress hormones over sex hormones. By lowering these inflammatory markers, boron helps create a "cleaner" environment for your natural testosterone to thrive.
Dietary Boron vs. Supplementation
You can find boron in many common foods, but it is difficult to reach the 10mg dose used in clinical studies through diet alone. Foods like raisins, almonds, walnuts, and avocados are relatively high in boron, but you would need to eat very large quantities of them every day to hit the effective threshold.
The modern Western diet is often deficient in boron because of intensive farming practices that deplete the soil of minerals. Most people only get between 1mg and 3mg of boron daily from their food. This is enough to prevent a severe deficiency, but it is not enough to optimize your hormonal health. This is why targeted supplementation of 6mg to 10mg per day is generally recommended for men looking to maximize their free testosterone levels.
Who Benefits Most from Boron?
Men with high SHBG levels are the ones who will see the most dramatic results from boron. If you have done blood work and noticed that your total testosterone is high but your free testosterone is low, high SHBG is likely the culprit. Boron is one of the few natural substances that has been clinically shown to move the needle on SHBG levels in a short period.
Boron is also helpful for men who are looking to balance their estrogen-to-testosterone ratio. Since the Naghii study showed a 39% reduction in estrogen alongside the increase in free testosterone, boron can be a valuable tool for men who are concerned about "estrogen dominance" or related symptoms like water retention and mood swings.
The TestoHit MAXX and boost Connection
Boron works best when it is part of a complete mineral and vitamin stack. This is why TestoHit MAXX includes a significant dose of boron alongside Zinc, Magnesium, and Vitamin D3 (100μg). This combination ensures that you are more than signaling for more testosterone, but also providing the cofactors needed to make it and the minerals like boron needed to keep it bioavailable.
For those who want to start their day with a baseline level of hormonal support, TestoHit boost coffee provides a mineral-rich base that works perfectly alongside your supplements. It contains high-quality Robusta coffee beans with added creatine and essential minerals like Zinc, which work in tandem with the boron in MAXX to support your overall endocrine health.
Learn more about the MAXX mineral stack here: Try MAXX Capsules
Check out boost coffee here: Try boost Testosterone Coffee
Frequently Asked Questions
Does boron really increase testosterone?
Yes, clinical studies have shown that 10mg of boron daily can increase free testosterone by about 28% in as little as one week. It does this by lowering the levels of SHBG in the blood.
How much boron per day for testosterone?
The most effective dose for hormonal optimization is between 6mg and 10mg per day. Most clinical trials use 10mg, while many daily supplements use 6mg to provide a safe, sustainable level of support.
How quickly does boron increase testosterone?
Hormonal changes can happen very quickly with boron. The Naghii study saw a significant increase in free testosterone and a decrease in SHBG after just seven days of daily use.
Is boron safe to take daily?
Yes, boron is a safe dietary mineral when taken at recommended doses. The tolerable upper limit for adults is 20mg per day, which is twice the dose used in most testosterone studies.
What foods are high in boron?
Raisins, almonds, avocados, walnuts, and chickpeas are all good sources of boron. However, it is difficult to reach the 10mg "optimization dose" through food alone without consuming excessive calories.
Should I take boron with zinc for testosterone?
Yes, taking boron and zinc together is a smart strategy. Zinc is necessary for the production of testosterone, while boron helps keep that testosterone free and active by reducing SHBG.
