A reader wrote in and asked for every way to raise testosterone naturally, no TRT. Fair question. I track mine, I've run the experiments, and I've wasted money on the bottles so you don't have to.
Here's the short version before the long one. The things that actually move your testosterone are mostly free, slightly boring, and nobody wants to hear them. The things in the shiny bottles are mostly a tax on hope. Let's rank them.
Deep Dive: what actually raises testosterone (and what just empties your wallet)
Think of it like a game. Everybody wants the cash-shop power-up. The moves that actually win are the free starter ones you skip because they aren't exciting
The big four (free, and they work)
1. Lose the extra fat, if you're carrying it. 🟢 Strong evidence. This is the biggest lever there is for an overweight man. Fat tissue runs an enzyme called aromatase that turns your testosterone into estrogen, so the more excess fat you carry, the more T you're quietly bleeding off. The relationship is close to linear: the more fat you lose, the more comes back. In a 2025 study, men who dropped about 10% of their body weight saw the share with normal testosterone climb from 53% to 77%. One caveat worth saying out loud: this is the lever for men carrying extra weight. If you're already lean it won't do much, and crash-starving yourself can backfire and drop T short term. Lose fat, don't punish yourself.
2. Sleep seven to eight hours. 🟡 Moderate evidence. In a controlled study, one week of five-hour nights dropped young men's daytime testosterone by 10 to 15%. One week. Most of your T is made while you sleep, so short-changing the night short-changes the factory. The study was young men, so read it as directional for us at 40+. Two things matter more at our age: the sweet spot really is seven to eight (both too little and nine-plus track with lower T in middle-aged men), and if you snore like a chainsaw, get checked for sleep apnea. Untreated apnea is a quiet testosterone killer, and it's common in 40+ men carrying a few extra pounds.
3. Lift weights. Then actually recover. 🟡 Moderate evidence. Resistance training raises testosterone over time. Endurance work barely touches it. But there's a trap: pile on too much volume with too little recovery and you flip the switch. Cortisol climbs, testosterone falls, and your training starts working against you. The fix isn't more, it's enough plus sleep
The moves that actually win are the free starter ones you skip because they aren't exciting.
Fix what's actually low (test, don't guess)
4. Vitamin D, zinc, magnesium, but only if you're short on them. 🟡 Moderate evidence for correcting a real deficiency. 🟠 Early or null for taking them when you're already topped up. This is the part the supplement ads bury. Zinc restores testosterone in men who are zinc-deficient and does nothing for men who aren't. Vitamin D looks great in observational data, then most randomized trials come back flat, except in men who were genuinely low to begin with. Magnesium is a maybe, a bit stronger when paired with training. The honest rule: these are deficiency-correctors, not boosters. The only way to know which camp you're in is to look at your numbers. (That's literally what the free tool and cheat sheet are for, link at the bottom.)
The bottles people obsess over (keep your expectations small)
5. Ashwagandha. 🟡 Moderate evidence. The best-studied of the herbs, with several small RCTs showing modest testosterone and strength bumps. It seems to work mostly by lowering stress and cortisol, so it's a better bet if you're fried than if you're already calm.
6. Tongkat ali and fenugreek. 🟠 Early evidence. A few decent trials, mostly working by freeing up testosterone that's bound to SHBG rather than making more of it. Real, but small, and the products vary a lot bottle to bottle.
7. Boron. 🟠 Early evidence. Small studies suggest it can lower SHBG and nudge free testosterone up. Cheap, low-risk, unspectacular.
The hope tax (skip these)
8. Tribulus and most "test boosters." 🟠 Mostly null. Tribulus is the headliner in half the boosters on the shelf, and in humans it basically doesn't raise testosterone. The animal studies look good and don't translate. Most proprietary "booster" blends are underdosed leftovers wrapped in a label that costs more than the ingredients. If a bottle promises you a number, keep the receipt.
My read: do the free four and fix any real deficiencies and you've captured almost all of the natural upside there is. The herbs are the rounding error everyone spends their money on first. Run it backwards from how the supplement aisle wants you to.
Quick Hits
Cut the heavy drinking. 🟡 Moderate evidence. Chronic heavy alcohol impairs testosterone production and, at the far end, shrinks the testes. The occasional beer isn't the enemy. The nightly four are.
Don't fear dietary fat. 🟠 Early evidence. Very low-fat diets modestly lower testosterone in some studies. You don't need a butter cult, just don't strip fat to zero while you're cutting.
Stress is a testosterone problem, not only a mood problem. 🟠 Mechanistic. Chronically high cortisol suppresses the same axis that makes testosterone. Hard to put a number on, easy to feel.
Rule out sleep apnea. ⚪ Worth knowing. If you're 40+, snore, and feel flat, an at-home sleep test is one of the higher-value things on this entire list.
My Experience
I did not want to be on TRT. I'm the guy who's scared of needles, remember, so I had every reason to fix my low testosterone with anything that wasn't a syringe. For a good stretch I was a one-man test market for the "do it naturally" promise.
I'll spare you the receipts, but I gave the shortcuts a real shot, the bottles that promise a number on the label and mostly deliver a number on your credit card statement. They did approximately nothing. What actually moved my labs was the boring, free, slightly annoying stuff: dropping the extra weight, guarding my sleep like it was a deadline, lifting and then actually recovering. None of it came in a bottle, and all of it beat the bottles.
Here's the honest ending, and it's why I take this topic seriously. I did the free stuff, did it properly, and my testosterone was still low enough that I needed the needle anyway. That isn't the natural levers failing. That's just my biology, and finding that out is the whole reason you test instead of guess. Do the free four first. They're free and they work. Just know that for some of us the real answer is "and you might still need more," and that's information, not failure.
My protocol, my body, my doctors. Not a template.
Before you buy a single bottle, look at your actual numbers. This whole issue comes down to one move: test, don't guess. The free Normal vs Optimal tool lets you punch in your testosterone (and the markers around it) and see where you really sit, not just whether you cleared the lab's floor. The cheat sheet tells you what to ask your doctor for. Both free at labs.the40protocol.com.
Next issue (Friday): the peptide ruling, the calm version. What actually happened, what everyone's getting wrong, and why "legal" won't mean "proven." This one was a reader request, so keep them coming, just hit reply with what you want covered.
The 40+ Protocol is educational content, not medical advice. I'm a game designer reporting studies and my own n=1 experiments, not a doctor. Talk to yours before changing anything. Some links may be affiliate links, flagged when they are, and only ever for things I would use myself.