What Is Free Testosterone?

Free Testosterone is the biologically active form of testosterone not bound to proteins like SHBG or albumin. It plays a crucial role in muscle growth, libido, mood, cognitive function, and overall vitality in men and women. Unlike total testosterone, free testosterone reflects the available hormone that can be used by tissues.

Why You May Want to Improve It

Low free testosterone may lead to fatigue, reduced libido, brain fog, poor muscle mass, and depressive symptoms. Optimizing levels naturally may support overall well-being and metabolic health.

• Low Energy & Fatigue: Testosterone supports mitochondrial energy and physical endurance.

• Sexual Health: Healthy testosterone is linked to libido and erectile function in men.

• Cognitive Function: Testosterone plays a role in memory, mood, and decision-making.

How to Improve Testosterone Naturally

Diet

• Zinc-Rich Foods: Oysters, beef, and pumpkin seeds support testosterone production.

• Healthy Fats: Avocados, olive oil, and eggs provide cholesterol—the building block of testosterone.

• Cruciferous Vegetables: Broccoli, kale, and cauliflower help reduce estrogen dominance and support hormone detoxification.

Lifestyle

• Strength Training: Resistance exercises boost testosterone and improve insulin sensitivity.

• Prioritize Sleep: Testosterone is released in deep sleep. Aim for 7–9 hours of quality rest.

• Sunlight & Vitamin D: Daily sun exposure or correcting vitamin D deficiency supports testosterone regulation.

• Reduce Alcohol & Sugar: Excess alcohol and high-sugar diets are linked to lower testosterone and higher estrogen.

Supplements

• Zinc: Crucial for luteinizing hormone (LH) production and testosterone synthesis.

• Ashwagandha: An adaptogen that may increase testosterone and reduce cortisol.

• DHEA: A precursor hormone that may support testosterone in some men—but only under physician supervision.

• Boron: May reduce SHBG and increase free testosterone bioavailability.

Medical Support

• Test Hormone Panel: Evaluate total T, free T, SHBG, LH, and estradiol for a full hormonal picture.

• Treat Underlying Issues: Address obesity, insulin resistance, or thyroid dysfunction that may suppress testosterone.

Normal Levels

Ranges vary by lab. Interpretation depends on age, symptoms, and SHBG levels.

When to See a Doctor

• Persistent fatigue, low libido, or erectile dysfunction

• Difficulty building muscle or unexplained weight gain

• Mood swings, depression, or brain fog

A MitoHealth hormone panel includes free testosterone, SHBG, LH, estradiol, and cortisol to provide insight into your full hormonal profile.

FAQs

Can you raise testosterone without TRT?

Yes—diet, exercise, sleep, and supplements like zinc or ashwagandha can naturally improve testosterone levels for many men.

Does stress affect testosterone?

Yes. Chronic stress increases cortisol, which suppresses testosterone production. Stress management is essential.

Is low testosterone common?

Yes, especially in men over 40. Lifestyle factors like poor sleep, obesity, and alcohol use are contributing causes.

How fast can testosterone levels improve?

With proper intervention, some improvements are seen in 4–6 weeks, though full optimization may take 3 months or more.