Check with them before you try supplements, both for safety and to make sure you'll get the results you're looking for. Your doctor can prescribe testosterone therapy as part of gender-affirming treatment. There aren't studies to back up using it for other symptoms. Beyond puberty, a woman's body mainly converts it to estrogen. But moderate amounts of flaxseed in your diet are unlikely to make a major difference. She used flaxseed supplements (30 grams a day) over a 4-month period. However, other research on soy and testosterone found conflicting results. However, as with sugar, it’s not clear if body fat plays a mediating role. However, you can still find some trans fatty acids in processed foods. This is particularly true for artificial trans fats, also known as industrial trans fats or partially hydrogenated fats. A 2019 study looked at men with hypogonadism, which means their testes don’t function properly. When your body is under stress it produces cortisol and this has an impact on other bodily functions, including the production of testosterone. In fact, some "testosterone-boosting" products don’t actually contain ingredients that support their claims, according to research. If you have low testosterone levels, a clinician might prescribe testosterone replacement therapy. There are many reasons why people might try to lower their testosterone levels. Popular as teas, peppermint and spearmint might lower testosterone levels. A 2019 review found that men who drink alcohol heavily have lower testosterone levels. Higher amounts of SHBG cause lower levels of free testosterone in the body. SHBG transports testosterone and other hormones throughout your body. More research on flaxseed must be conducted to clarify whether it can reduce testosterone levels. Although the participants who used flaxseed had improved biomarkers, flaxseed didn’t seem to affect their testosterone levels. Flaxseed is high in lignans, which might lower testosterone levels. While research is mixed, it may be best to consume soy in moderation if you have clinically low testosterone levels. Pistachios contain arginine, an amino acid that enhances blood flow and supports overall vascular health, indirectly benefiting reproductive function. Macadamia nut butter is a testosterone powerhouse thanks to its high content of monounsaturated fats. Our medical experts take a closer look at the best nut butters to help you give your testosterone a natural boost.