Is Almond Milk Bad for Men’s Testosterone?

No credible evidence shows that drinking almond milk lowers testosterone in men. The concern traces mainly to confusion about phytoestrogens, plant compounds that weakly mimic estrogen, but almonds contain far less of these compounds than soy, flax, or other foods that get more scientific attention. The story is more interesting than a simple “it’s fine,” though, because the fears tap into real questions about how diet, hormones, and modern food processing interact.

Where the Worry Comes From

The idea that almond milk might lower testosterone usually starts with phytoestrogens. These are naturally occurring plant chemicals that can bind to estrogen receptors in the body, and the leap people make is: more estrogen-like activity equals less testosterone. Soy is the usual target of this anxiety, but it has spilled over to other plant-based milks, including almond.

Almonds do contain trace amounts of phytoestrogens. A 1977 laboratory study found estrogenic activity in almonds, among other foods like cashews, peanuts, oats, and apples. The original almond sample showed the strongest activity of the group. But when the researchers tested different batches of almonds, the estrogenic activity disappeared entirely, suggesting the initial result was either a fluke or tied to contamination of that particular sample rather than a reliable property of almonds themselves.¹ The researchers themselves called it a mystery. Nearly five decades later, almonds have never been identified as a meaningful dietary source of phytoestrogens the way soy, flax, or red clover have.

Even if almonds did contain consistent phytoestrogens, almond milk is mostly water. A typical glass contains only a small handful of actual almonds, usually around two to four percent almonds by weight depending on the brand. Whatever trace phytoestrogens exist in whole almonds get diluted dramatically by the time they reach your glass. The dose simply isn’t there.

What Happens When You Compare Plant and Dairy Milks

The closest researchers have come to testing this directly involved comparing soy milk, which has far more phytoestrogens than almond milk, against dairy milk in young men. A randomized crossover trial had men drink either dairy or soy milk after resistance exercise and then measured their sex hormones over several hours. There were no significant differences in free testosterone, total testosterone, or estrogen between the two conditions.² Both groups saw a temporary testosterone bump after lifting, which is a normal exercise response, and the type of milk made no difference to its magnitude.

This matters because soy milk is the plant milk with the most phytoestrogen content and the most scientific scrutiny. If soy milk doesn’t budge testosterone in a controlled setting, the idea that almond milk, with far fewer phytoestrogens, would do so has essentially no scientific basis. No study has directly tested almond milk’s effect on men’s testosterone, but that’s because there’s no mechanistic reason to expect it would matter enough to warrant one.

The Tropical Almond Confusion

If you search the scientific literature for “almond” and “testosterone,” you’ll find a handful of animal studies that look promising at first glance but turn out to be about a completely different plant. Terminalia catappa, sometimes called “tropical almond” or “Indian almond,” is a tree found in tropical regions whose fruit and seeds are used in traditional medicine. It’s not related to Prunus dulcis, the sweet almond that gets turned into almond milk.

One study fed Terminalia catappa to diabetic rats and found that diets supplemented with its drupe and seeds helped restore sexual hormone levels, including testosterone, follicle-stimulating hormone, and luteinizing hormone, compared to untreated diabetic rats.³ That sounds relevant until you realize it’s a different species studied in diabetic animals, not healthy humans, and it actually showed a positive effect on hormones rather than a negative one. This kind of species confusion crops up regularly in online health claims, where people cite studies about one organism as if they apply to another.

Nuts and Male Reproductive Health

When you look at research on tree nuts and male fertility more broadly, the picture is surprisingly positive rather than harmful. A systematic review and meta-analysis that pooled data from randomized trials found that men eating two or more servings of nuts daily saw improvements in sperm motility, vitality, and morphology compared to controls.⁴ These are markers doctors use to assess male fertility, and the improvements were seen in the context of a typical Western diet.

A separate clinical trial focused on walnuts found that after three months, men in the walnut group had increased sperm motility and concentration compared to a nutritional supplement group.⁵ Preliminary follow-up data even hinted at higher pregnancy rates in the walnut group, though that finding didn’t reach statistical significance. While these studies used whole nuts rather than nut milks, they undercut the narrative that nut-derived products are bad for male hormones. If anything, the evidence points in the opposite direction.

Part of the mechanism may involve arginine, an amino acid found in relatively high amounts in tree nuts. Arginine is a precursor to nitric oxide, a compound that relaxes blood vessels and plays a role in erectile function. A trial analyzing nut consumption and sexual function found that the arginine-to-nitric-oxide pathway may help explain some of the benefits, though the researchers cautioned they couldn’t confirm it was the only factor at work.⁶

What Should Actually Concern You About Almond Milk

If you’re drinking almond milk and thinking about your hormonal health, phytoestrogens are essentially a non-issue. But there are a couple of things worth knowing about that have nothing to do with almonds specifically and everything to do with how processed beverages are made and packaged.

Commercial almond milks contain various additives, including emulsifiers, stabilizers, sweeteners, and flavorings. Some of these ingredients have drawn scrutiny for metabolic effects, though the research is in early stages and mostly involves animal models at doses higher than what you’d get from a glass of almond milk. The bigger picture here is that ultra-processed foods in general tend to be associated with worse metabolic outcomes, but singling out almond milk as a culprit makes no sense when it sits alongside dozens of similar products in a typical diet.

Packaging is a more concrete concern. Plant-based milks typically come in Tetra Pak cartons or plastic bottles, and both can contain compounds that leach into food. Bisphenols and phthalates are the endocrine disruptors most commonly associated with food packaging contamination.⁷ These chemicals can mimic or interfere with hormones, and the migration of low-molecular-weight compounds from packaging into food is a well-documented phenomenon.⁸ This isn’t unique to almond milk; it applies to dairy milk, juice, soda, and basically anything sold in plastic or lined containers. If you’re worried about endocrine disruptors and testosterone, packaging chemicals are a far more evidence-based concern than phytoestrogens in almonds.

Why Genetics Make Blanket Claims Unreliable

One reason the “phytoestrogens are dangerous” narrative oversimplifies things is that people don’t all respond to these compounds the same way. How your body processes phytoestrogens depends partly on your genetics, particularly variations in genes related to estrogen receptors and the enzymes that metabolize these compounds.

A study on phytoestrogen intake and prostate cancer risk found a significant interaction between dietary phytoestrogen consumption and a specific variation in the estrogen receptor-beta gene. Among men carrying certain variant alleles, higher phytoestrogen intake was actually associated with a substantially lower risk of prostate cancer.⁹ A separate study looking at polymorphisms in several related genes, including COMT, CYP19, ESR1, and SHBG, found no overall evidence that phytoestrogen exposure altered prostate cancer risk in British men, though a specific estrogen receptor polymorphism was independently linked to higher risk.¹⁰

The takeaway isn’t that you need genetic testing before choosing a milk. It’s that the relationship between plant compounds and hormones is more individual and more nuanced than internet health influencers tend to suggest. For most men, phytoestrogens at dietary levels aren’t doing much of anything hormonally, and for some, they may even be protective against certain conditions.

The Bigger Factors That Actually Affect Testosterone

The focus on almond milk as a testosterone threat is a distraction from the things that genuinely move the needle on men’s hormone levels. Sleep is one of the strongest influences: consistently getting fewer than five or six hours a night can drop testosterone by a meaningful amount. Body fat percentage matters too, because fat tissue contains an enzyme that converts testosterone to estrogen, which is why losing excess weight often raises testosterone without any other intervention. Resistance exercise reliably produces both acute and chronic increases in testosterone levels, which is something the dairy-versus-soy trial touched on when both groups showed a post-workout testosterone spike regardless of milk type.

Chronic stress raises cortisol, which suppresses testosterone production. Heavy alcohol consumption damages the cells in the testes that produce testosterone. Certain medications, including opioids and some antidepressants, can lower levels significantly. And age itself brings a slow decline, roughly one to two percent per year after 30 in most men, which is entirely normal and not something almond milk is going to accelerate.

If your testosterone is genuinely low, the cause is almost certainly somewhere in that list, not in your choice of non-dairy milk. And if your testosterone is normal, no food you eat in ordinary amounts is going to tank it. The endocrine system has robust feedback mechanisms specifically designed to keep sex hormones in a functional range despite day-to-day variation in diet.

Homemade Versus Commercial Almond Milk

For anyone concerned enough to take action, one practical option is making almond milk at home. The process is simple: soak almonds, blend with water, strain. What you get is a product with a higher actual almond content than most store-bought versions, no emulsifiers or stabilizers, and no packaging chemicals leaching into your drink. You lose the vitamin D and calcium fortification that commercial brands add, which you’d need to get elsewhere in your diet, but you gain transparency about what’s actually in the glass.

The nutritional trade-offs between commercial and homemade versions are worth considering beyond just hormones. Store-bought almond milk is typically fortified with calcium, vitamin D, and sometimes B12, nutrients that are important for bone health and energy metabolism. Homemade versions are essentially almond-flavored water with some healthy fats and a modest amount of protein. Neither version contains enough phytoestrogens, or really enough of any single compound, to meaningfully influence testosterone. The choice between them comes down to convenience, taste, and whether you want the added nutrients or prefer a cleaner ingredient list.