Final answer:
Testosterone is the only thing scientifically proven to increase sex drive, with natural ways to increase its levels.
Step-by-step explanation:
The only thing scientifically proven to increase sex drive is the hormone testosterone. Testosterone is produced in both males and females, but at higher levels in males. It plays a crucial role in regulating sexual desire and performance. There are several ways to naturally increase testosterone levels, such as regular exercise, getting enough sleep, managing stress, maintaining a healthy weight, and consuming a balanced diet. However, it's important to consult with a healthcare professional before making any changes to your lifestyle or considering testosterone supplementation.