Vegetable oil

Polyunsaturated fatty acids are abundant in many of the most popular vegetable oils, including canola, soybean, maize, and cottonseed oil. These fatty acids are typically regarded as a good source of dietary fat, however, some studies have revealed that they may also lower testosterone levels. One research of 69 males found that eating polyunsaturated fats often was related to considerably decreased testosterone levels.

Another research of 12 men looked at the impact of food on testosterone levels after exercise and found that polyunsaturated fat consumption was associated with decreased testosterone levels. Recent research, however, is sparse, with most studies being observational and having a small sample size. More high-quality research on the impact of vegetable oils on testosterone levels in the general population is needed.