Foods that lower testosterone get blamed for a lot, but only a handful actually move the needle in men, and several famous “culprits” don’t hold up when you read the trials. This guide separates the foods with real hormonal effects (licorice, alcohol, trans fats, sugar-heavy meals) from the myths (soy, milk, mint) and explains what to change if your levels are already borderline. If you suspect low T, diet tweaks help at the margins, but a proper blood test tells you whether food is the problem at all.
Foods That Lower Testosterone: The Ones With Real Evidence
Most nutrition headlines about testosterone are built on rodent studies or single small trials. A few foods, though, have been tested directly in men, and the results are hard to argue with.
Licorice
Real black licorice, the kind made with glycyrrhizin from the licorice root, is the best-documented example. In a small but frequently cited study published in the New England Journal of Medicine, healthy men who ate about seven grams of licorice daily saw their serum testosterone drop by roughly a third within a week. Glycyrrhetinic acid blocks two of the enzymes the testes use to build testosterone from its precursors. Levels recovered once the men stopped, so the effect is reversible, but it is one worth knowing about if you snack on the real thing or take licorice-root supplements for digestion.
Alcohol
Regular heavy drinking suppresses testosterone at three points: the hypothalamus, the pituitary, and the testes themselves. Chronic intake also pushes more testosterone toward conversion into estrogen and adds abdominal fat, which compounds the problem. A drink or two on a weekend is unlikely to matter. Nightly drinking, or binge sessions several times a week, absolutely can. We covered the mechanisms and thresholds in detail in our guide to alcohol and testosterone.
Trans fats
Industrial trans fats, still found in some margarines, packaged pastries, fried fast food, and shelf-stable snacks in many markets, show a consistent inverse relationship with testosterone and sperm quality in men. Observational studies of young men have found lower total testosterone and lower sperm counts in those with the highest trans-fat intake. The likely explanation is direct damage to Leydig cell function alongside the inflammation and insulin resistance that trans fats promote. Reading labels for “partially hydrogenated oil” is the simplest fix.
Sugar-loaded meals
Testosterone dips acutely after a large glucose load. In one study of men given a standard 75-gram glucose drink, total testosterone fell by around 25 percent within an hour or two and stayed lower for most of the test window. A single sweet snack won’t wreck your hormones, but a diet built on sugary drinks and refined carbohydrates keeps insulin chronically elevated, drives fat gain, and lowers SHBG, all of which erode testosterone over time.
Foods That Lower Testosterone in Theory but Not in Practice
This is where most online lists go wrong. Several foods have a plausible mechanism on paper, yet human data say otherwise.
Soy
Soy contains isoflavones, plant compounds that can weakly bind estrogen receptors, which is why tofu and soy milk top nearly every list of foods that lower testosterone. Human trials disagree. A 2021 meta-analysis of 41 clinical studies covering more than 1,700 men found no meaningful effect of soy foods or isoflavone supplements on total testosterone, free testosterone, estradiol, or SHBG. Two case reports of men eating extreme amounts of soy (think three liters of soy milk a day) are the source of the scare. Normal servings are not a concern.
Milk and dairy
Commercial milk contains small amounts of estrogen and progesterone from pregnant cows. The quantities, though, are tiny compared with what a man’s own body produces, and controlled studies have not put moderate dairy intake among the foods that lower testosterone. If dairy causes bloating or inflammation for you personally, reduce it for that reason, not for your hormones.
Mint
Spearmint tea gained an anti-androgen reputation from studies in women with polycystic ovary syndrome, where it modestly lowered free testosterone. There is no comparable evidence in men, and the amounts used were several cups of strong tea daily for weeks. A mint leaf in your water is not a threat.
Why the Overall Diet Matters More Than Any Single Food
Individual foods that lower testosterone are less important than the pattern they belong to. The strongest dietary predictors of low T in large population studies are excess body fat, especially around the waist, and chronic under-eating of protein and healthy fats. Very low-fat diets have been shown to reduce testosterone by 10 to 15 percent in some trials, because cholesterol is the raw material for every steroid hormone.
Excess fat tissue is arguably the biggest food-related driver of all. Fat cells contain aromatase, the enzyme that converts testosterone into estradiol, so more fat means more conversion and higher estrogen in men. A diet that keeps you lean does more for your testosterone than avoiding any one ingredient.
If you’re looking for the flip side of this list, our article on the best foods to increase testosterone covers what to add rather than what to cut.
How to Tell If Diet Is Actually Your Problem
Symptoms such as low energy, reduced libido, stubborn belly fat, and poor recovery overlap heavily with the signs of low testosterone in men, but they also overlap with poor sleep, stress, and simple overtraining. Guessing is expensive. A morning hormone blood test that includes total and free testosterone, SHBG, estradiol, and LH tells you where you actually stand and whether cleaning up your diet is likely to be enough.
A practical approach looks like this: cut back on alcohol and real licorice, remove obvious trans fats, replace sugary drinks with water or unsweetened alternatives, keep dietary fat at a sensible 25 to 35 percent of calories, and work toward a leaner waistline. Give it eight to twelve weeks, then retest. If levels are still clinically low despite those changes, the cause is usually not on your plate, and it may be time to discuss treatment.
Take the Guesswork Out of Low Testosterone
Diet is a lever, not a cure. If you’ve already tightened up what you eat and still feel flat, Nova Men’s Health can run the right labs, interpret them properly, and talk you through your options, from lifestyle protocols to medically supervised testosterone replacement therapy. Book a consultation today and find out what your numbers really say.