The honest guide to sexual performance for men part 1. What kills test

The industry lies.

What they’re selling you.

The supplement industry has one job: make you believe the problem is a deficiency. Before you fix anything, you need to understand what kills testosterone in the first place. The answer is almost always behavioral, not biochemical.

You’re not producing enough testosterone. Your nitric oxide is low. Your cortisol is too high. Buy the product. Fix the deficiency. Perform again.

That framing is wrong. Not slightly wrong — structurally wrong. The deficiency is real in some cases. The product can help. But the product is not where the problem starts, and it is not where the solution starts either.

What they’re selling you is a shortcut to a destination you haven’t built the road to yet.

What actually degrades.

Two things fail. Not one.

The first is desire. The wanting. The instinctive pull toward your partner that used to require no effort and now requires you to think about it. When desire goes, sex becomes a task. You initiate out of obligation. You finish. You move on. The charge is gone.

The second is physical capacity. Stamina. Blood flow. Erection quality. The ability to be fully present in the body during sex — not monitoring, not managing, not hoping — just there. This is not psychological. It is mechanical. It degrades when your cardiovascular base degrades, when your body composition shifts, when your testosterone drops.

Most men notice the second problem first. They assume it’s the only problem. It isn’t.

The real standard.

The standard is not feeling better about yourself. It is not a number on a bloodwork panel. It is not “intimacy” or “connection” or any other word that politely avoids the subject.

The standard is making her come.

That requires desire — the instinct to initiate, to be present, to want her. And it requires physical capacity — the stamina and mechanics to follow through. Both degrade. Both come back. The rest of this guide is the system.

How this works: two components.

Desire.

Desire is not motivation. Motivation is something you manufacture. Desire is something that either exists or it doesn’t.

When it’s working, you don’t think about initiating. You just do it. There’s a pull. She moves a certain way and something registers before you’ve made a decision.

When it’s gone, you notice it’s gone. You think about whether you want to. You run the calculation. You probably initiate anyway — out of habit, obligation, or the vague memory of what it used to feel like.

That calculation is the problem. Not the answer you land on. The fact that you’re calculating at all.

Desire went somewhere. It comes back. The stops and investments in this guide are what bring it back.

Physical capacity.

This is the part men understand, because it’s easy to measure.

Erection quality. Stamina. The ability to maintain intensity without losing the signal. These are not mysterious. They are downstream outputs of cardiovascular health, testosterone levels, blood flow, and body composition.

A man who hasn’t done Zone 4 or Zone 5 cardio in six months has less blood flow than a man who has. A man carrying excess body fat is converting testosterone to estrogen at a higher rate than a man who isn’t. These are mechanical facts. Mechanical problems have mechanical solutions. For more on this, see Maximum ROI looksmaxxing for men. Fixing the hormonal environment also improves how you look. Same inputs, two outputs.

Why both matter.

You can restore physical capacity while desire is still flat. It helps. But you are now a man with the hardware and no software.

You can restore desire while physical capacity is still compromised. The wanting is back but the follow-through is unreliable. That is its own problem.

The system addresses both. The zero-cost stops in this post do more for desire than any supplement on the market. The time investments in part 2 do more for physical capacity than anything else on the list. Both degrade together. Both come back together. The sequence matters.

Start here — it costs nothing.

Every item in this section kills testosterone, suppresses libido, or degrades physical capacity — sometimes all three at once. Every item also requires zero extra hours and zero money to stop.

That is why you start here — not because these are the smallest changes, but because they remove the most damage for the least investment.

How alcohol kills testosterone — and why one drink is already three problems.

What it does.

Alcohol suppresses testosterone production directly. It also disrupts sleep architecture — specifically REM sleep, which along with deep sleep are part of the recovery architecture that supports healthy testosterone. And it increases aromatase activity, meaning the testosterone you do produce gets converted to estrogen at a higher rate. Drinking alcohol literally increases your female hormones.

Now, estrogen is good; it’s good in a reasonable quantity in men, which your body already produces naturally, but too much of it is obviously bad. One drink does all three. It destroys sleep, reduces testosterone and increases estrogen. The dose-response is linear. Less is better. Zero is best.

Why it matters sexually.

Testosterone drives desire. Sleep is the recovery mechanism that restores it overnight. Cortisol — which alcohol raises — competes with testosterone for the same hormonal pathway. You are not dealing with one variable. You are dealing with three, triggered by the same substance.

What to do instead.

Stop. Not moderate. Not switch to wine. The mechanism does not care about the form. If alcohol is a non-negotiable, know that you are choosing it over the output you want. That is a legitimate choice. I’m here to inform you and help you fix a problem. If you still decide to drink and want to do damage control, here’s a post to help you do it: The complete guide on how to drink like a pro.

Why nicotine destroys blood flow and erection quality.

What it does.

Nicotine is a vasoconstrictor. It reduces nitric oxide availability, tightens blood vessels, and damages the endothelium — the lining of the blood vessels — over time. Vaping delivers the same mechanism in a different format.

Why it matters sexually.

An erection is a blood flow event. The mechanism that produces one requires vasodilation and nitric oxide — the same system nicotine is actively constricting. Tobacco is one of the strongest lifestyle predictors of erectile dysfunction. This is not a correlation. It is the mechanism.

What to do instead.

Stop. Vaping included. The tobacco variable is not the problem — the nicotine is.

What cannabis does to testosterone, prolactin, and libido.

What it does.

Regular cannabis use is not sexually neutral. For many men, it can interfere with sleep architecture, dopamine sensitivity, drive, and the hormonal signals connected to testosterone and libido.

THC suppresses luteinizing hormone — the signal that tells the testes to produce testosterone. It raises prolactin, which is the hormone that kills libido. The same hormone that rises after orgasm. It disrupts REM sleep. A glass pipe removes the tobacco variable and the paper. It does not remove any of these.

Vaping cannabis combines the THC suppression with the vasoconstriction. Both mechanisms, one delivery.

Why it matters sexually.

Testosterone and prolactin are on opposite ends of the same axis. You cannot raise one while the other is chronically elevated. And REM sleep — where testosterone is produced and desire is restored overnight — is the first casualty of regular THC use.

What to do instead.

Zero. Not switching to a glass pipe. Not weekends only. Zero is what removes the suppression.

If smoking is truly non-negotiable, limit it to twice a month, pure weed only, no tobacco, in a glass pipe. That cuts the added combustion byproducts. It does not touch the THC and prolactin problem.

How porn suppresses desire for real sex.

What it does.

Porn conditions the arousal response to novelty, high stimulation, and an infinite selection that real sex cannot replicate. Edging — bringing yourself close to orgasm repeatedly without finishing — trains a response loop that does not transfer. Frequent ejaculation with porn desensitizes the dopamine system over time.

Why it matters sexually.

Desire for your partner requires a dopamine system that responds to her or at least to real girls in the real world, and an arousal loop calibrated to reality. Porn degrades both. The result is not a man who wants sex less — it is a man who wants a screen more than a person. That gap does not announce itself clearly. It shows up as flat response, as needing more to get there, as being present in the body but absent in the drive.

Access to sexual gratification without human interaction also makes you less patient with normal human friction. You don’t want more of that. You want more reality, not more screen.

What to do instead.

Stop porn entirely. Limit masturbation — the research does not support total abstinence indefinitely, but frequency matters. No edging. The response loop needs to be recalibrated to real stimulation, which takes time and requires removing the substitute.

If you have no other way to access sexual release, masturbation is fine. It’s not an issue, especially without porn. The problem is frequent masturbation with a grip that does not reflect anything close to reality.

Diet and testosterone: what you eat determines your hormonal output.

What it does.

Processed food, seed oils, and excess sugar drive systemic inflammation, raise cortisol, impair sleep quality, and contribute to excess body fat. Body fat is metabolically active tissue. It converts testosterone to estrogen through a process called aromatization. The more excess fat you carry, the higher your estrogen-to-testosterone ratio. And as you remember, estrogen is a female hormone, and you don’t want to have too much of it for sexual output and libido.

Why it matters sexually.

Testosterone is downstream of what you eat and how much fat you carry. This is not about aesthetics. It is about the hormonal output of your body composition. A man at 20% body fat is running a different hormonal profile than a man at 12%. The difference shows up in desire, in energy, in the quality of erections. Talking about aesthetics, if you want to see how it looks from the female perspective, here’s an experiment about it.

What to do instead.

You do not need an expensive diet: sardines, eggs, chicken, and no-drama vegetables like spinach, cucumber, bell peppers, maybe some kefir, oats, bananas. High protein, high micronutrient density, low processing, low prep. The goal is not perfection — it is removing the inputs that are actively suppressing the system.

These aren’t superfoods. They’re just food that works, without the hype. They are the inputs the system actually runs on.

Testosterone is synthesized from cholesterol. Eggs are the most efficient dietary source of cholesterol available — which is why decades of low-fat dietary advice did exactly what you would expect to the testosterone levels of the men who followed it. Sardines add zinc, omega-3 fatty acids, and vitamin D. Zinc is a direct testosterone precursor. Most men eating a processed diet are deficient in it. Chicken is lean protein — protein supports muscle mass, and muscle mass supports the hormonal profile that makes everything else in this guide work. If you eat bones and cartilage, then you are increasing your calcium and your collagen naturally as well.

The vegetables are doing specific jobs. Spinach is high in magnesium, which is one of the most important minerals for testosterone production and one of the most common deficiencies in men who eat poorly. It also contains nitrates, which support nitric oxide production — the same mechanism that drives blood flow and erections. Bell peppers have the highest vitamin C content of any vegetable, or anything really on a per calorie basis. Vitamin C directly reduces cortisol. Cortisol and testosterone compete for the same hormonal pathway. Every point of cortisol reduction is a point returned to testosterone.

Kefir adds a probiotic load that supports gut health — the gut microbiome influences how the body metabolises and clears both testosterone and estrogen. If you’re lactose intolerant, you’ll be able to find versions without lactose. Oats contain compounds that reduce SHBG — sex hormone binding globulin — which is the protein that binds testosterone and makes it unavailable to the body. Less SHBG means more free testosterone. Bananas are B6 and fast carbs — straightforward energy and a supporting role in testosterone synthesis.

None of this requires meal planning. The prep is low. The cost is low. The point is not dietary perfection — it is removing the inputs that actively suppress the system and replacing them with inputs the system can use.

BPA and endocrine disruptors: the hidden testosterone killers.

Endocrine disruptors.

Your endocrine system is the hormonal signaling network that controls testosterone, estrogen, cortisol, and everything downstream of them. An endocrine disruptor is a chemical that interferes with that signaling — typically by mimicking a hormone, blocking a hormone, or altering how hormones are produced and cleared. The most relevant one for testosterone is BPA.

What BPA does.

BPA — bisphenol A — is an industrial chemical used to harden plastics like plastic bottles and line metal containers like food cans. It is in more of your daily environment than you think. It is a xenoestrogen: it mimics estrogen in the body, binds to estrogen receptors, and disrupts the testosterone-to-estrogen balance. It does not do this dramatically or acutely.

It does it chronically, at low doses, from sources most men do not think about twice.

Canned goods.

Most metal cans have an epoxy resin lining on the interior to prevent corrosion. That lining typically contains BPA. It leaches into the food — more so with acidic foods like tomatoes and citrus, and more so when cans are heated. One note on sardines: sardines packed in olive oil are low-risk. The oil is not acidic and does not drive the same leaching. The problem is canned tomatoes, citrus, and acidic sauces — not every can equally.

Receipts.

Thermal paper — the paper used for most retail receipts — uses BPA as its color-developing agent. It is not printed with ink. BPA is embedded in the surface. When you touch the receipt, BPA transfers through the skin. Transdermally. If you use hand sanitizer before handling a receipt, skin permeability increases significantly. Thirty seconds of contact can produce a measurable elevation in blood BPA levels.

The fix.

Glass jars instead of cans where possible. BPA-free labeling if you buy canned or at least not containing acidic foods like citrus or tomato. Decline the receipt, or take it briefly and don’t rub it between your fingers. These are zero-cost substitutions that remove a chronic low-level estrogen load from the system.

What this costs you.

No extra hours. No gym membership. No supplement budget. Every step in this post is free to make.

The only cost is the behavior itself. Alcohol, tobacco, porn, drugs, endocrine disruptors — none of them require money to remove. It costs nothing to not drink. It costs nothing to not smoke. And the food costs nothing extra either — you’re already buying groceries, so eating sardines and eggs instead of something else isn’t a new expense. What they require is a decision that you stop subsidizing inputs that are working against the output you want. That is the entire step one of the plan.

Most men skip this step. They go straight to the product, the protocol, the time investment. Then they wonder why it isn’t moving the needle while still drinking on weekends or eating junk food.

The sequence matters. This is step one because it costs nothing and because nothing after it works properly until it’s done.

Also, the most important part is that zero alcohol is better than a bit of alcohol, but any reduction of the alcohol you consume is better than nothing.

Don’t fall into all-or-nothing thinking — deciding that because you can’t quit completely, you might as well keep drinking the same amount. That’s the trap, and it makes things worse, not better. Any step in the right direction is a step in the right direction, period.

None of this requires a new morning routine. None of it requires another subscription. It requires stopping the behaviors that keep the system suppressed.

Anyway, part 2 covers what comes next — the foundation that requires time yet has immense ROI. Sleep, lifting, cardio, body composition. The levers that build the system rather than just clearing the interference.

Go to the next level with: The honest guide to sexual performance for men part 2.