Overview Like anything else, too much of a sex drive can be a bad thing. Many individuals have heightened sex drives that cause them to become distracted in the workplace and at home. An increased sex drive often correlates with heightened aggression, and it can also lead to sex addiction. If you have an increased sex drive and want to relieve yourself of its constant presence, there are a number of things you can do to decrease your libido and keep it under control. Step 1 Infuse your diet with soy. Soy has been proven to reduce testosterone levels, which will in turn reduce libido. Step 2 Eat a low-fat diet. Increased consumption of fat is associated with an increase of testosterone levels, but cutting back on fats--particularly saturated fats--will help bring your sex drive down. Step 3 Eat the herb caste tree berry. Also known as "monk's pepper," this supplement has been used to reduce libido since the Middle Ages. But unlike most other herbs, it has retained its use, as it has been proven over time to be effective in combating a high sex drive. Step 4 Stay away from animal proteins. The proteins and hormones found in meats like beef, chicken, pork and turkey can contribute to high testosterone levels. Vegetarians tend to have lower testosterone levels than omnivores, and thus lower libidos. Step 5 Exercise frequently. Working out reduces your testosterone levels while increasing cortisol. Marathon runners frequently have lower-than-average testosterone levels because of this. Step 6 Visit your doctor and ask about medications that might lower your sex drive. Your options will vary depending on your medical history, but there are multiple pills you can be prescribed to help you win the battle against an overactive sex drive.