Most men think low testosterone is something that happens to older guys or guys who don't take care of themselves. The reality? An estimated 30 million men worldwide are clinically low and most of them have no idea because the symptoms get written off as stress, aging, or just being busy.

That ends today. Let's break down exactly what testosterone is, how your body makes it, and the specific levers you can pull to optimize it.

Testosterone is the primary male sex hormone and anabolic steroid responsible for developing masculine characteristics and maintaining your overall drive and health. It's not just about muscle it governs your energy, mood, libido, bone density, and body composition.

When levels fall below 300 ng/dL, it's classified as hypogonadism (clinical low testosterone)

The symptoms are hard to ignore once you know what you're looking for:

And beyond the physical, low testosterone chips away at confidence, self-esteem, and your overall sense of self.

Your testosterone doesn't operate in isolation. It's regulated through a tightly coordinated system called the HPG Axis (the hypothalamic-pituitary-gonadal axis)

Here's how the chain of command works:

Hypothalamus → releases GnRH → stimulates the pituitary → releases LH and FSH → stimulates leydig cells in the testes → cholesterol is converted into testosterone

It's a loop. When testosterone levels are sufficient, they signal back to the hypothalamus to slow production. When levels drop, the signal goes back up. The entire system is self-regulating unless something disrupts it.

Once testosterone is in your bloodstream, it exists in two forms: bound and free.

Free testosterone makes up only 2–3% of your total, but it's the most biologically active form. It's what directly interacts with your tissues, drives muscle building, supports recovery, and keeps you feeling like yourself.

Bound testosterone is attached to a protein called SHBG (sex hormone binding globulin), which protects and transports sex steroids through the bloodstream. While necessary, SHBG essentially puts testosterone out of commission because it can't act on tissues while it's bound.

The sweet spot is keeping SHBG in the low-to-mid reference range: high enough to prevent excessive testosterone from being metabolized too quickly, low enough to keep free testosterone accessible.

Factors that increase SHBG (and lower your free testosterone):

To optimize, work against this list in moderation:

This is where most people go wrong. If you're obsessed with staying lean and you're cutting hard for extended periods, you're actively suppressing your testosterone and here's the mechanism behind it.

When your body senses prolonged low energy intake, it interprets that as a survival threat. In response:

Your body doesn't know you're trying to get a six-pack. It thinks you're starving. And it responds accordingly. This is why strategic cuts are needed in a long term plan not just out of emotional need.

Once produced, testosterone can be converted down one of two pathways: DHT or estrogen.

DHT (dihydrotestosterone) is the one you want more of. It binds to androgen receptors with 2–3x greater affinity than testosterone itself making it significantly more potent for driving the anabolic effects most men are after.

To support your body's conversion of testosterone to DHT:

1. Sleep 90% of your testosterone is produced during deep REM sleep. One week of five-hour nights is enough to drop levels by up to 15%.

2. Body Composition Excess body fat, particularly visceral fat, is loaded with aromatase, the enzyme that converts testosterone into estrogen. The leaner you are (within a healthy range), the less conversion occurs.

3. Stress Management Chronic cortisol directly downregulates the entire HPG axis. Like big time. You can have everything lined up perfect but if you do not regulate your stress you will never be “optimal”.

4. Liver Health Your liver produces SHBG and manages hormonal clearance. A fatty or inflamed liver from chronic alcohol use or poor diet will compromise your hormonal environment.

5. Diet Foundations Testosterone is synthesized from cholesterol. Without adequate dietary fat, especially saturated and monounsaturated sources, your body lacks the raw material to produce it. Calculated caloric intake matters here too.

6. Thyroid Health The thyroid is the primary driver of SHBG production. An underperforming thyroid will throw off your free-to-total testosterone ratio even if total levels look fine on paper.

7. Resistance Training Heavy compound training signals demand for testosterone to repair and adapt tissue. It also improves insulin sensitivity, which directly lowers SHBG.

8. Micronutrients Zinc, magnesium, vitamin D, and boron are direct cofactors in testosterone synthesis. Deficiencies in any of these create a ceiling on production.

A strong foundation starts with a comprehensive multivitamin covering:

On top of that, targeted additions:

You don't need a complete overhaul. You need to start pulling the right levers. Here's what to focus on this week:

1. Lock in your sleep window. Pick a consistent bed and wake time and protect it. Aim for 7–9 hours. If your sleep quality is poor, that's the single highest-leverage fix on this entire list.

2. Get your body fat assessed. If you're carrying excess weight, especially around the midsection, that's active aromatase converting your testosterone into estrogen right now. Focus on undoing that

3. Audit your diet for fat intake. Testosterone is built from cholesterol. If you've been on a chronic low-fat or low-calorie diet, you're limiting your raw material. Add back quality fat sources like whole eggs, red meat, olive oil, avocado.

4. Get bloodwork done. Full panel: total testosterone, free testosterone, SHBG, estradiol, and thyroid (T3/T4), CBC, and CMP. If you have never done it, it is way past time top check under the hood.

5. Start or recommit to resistance training. Three days of compound lifting is enough to meaningfully impact insulin sensitivity and testosterone signaling. Keep it simple and stay consistent.

6. Address one stress leak. Chronic cortisol is a silent HPG axis killer. Identify the one thing in your life generating the most low-grade, chronic stress and take one concrete step to reduce it this week.

7. Tighten up the micronutrient foundation. Start a quality multivitamin if you're not already on one. Prioritize zinc, magnesium, and vitamin D as these are the most common deficiencies that directly cap testosterone production.

As always, I hope this was useful and added more tools in your journey of being jacked and happy in your skin

If this was useful, check out my other deep dives! → here

Want this done for you? See how I work with clients! → here