| Effect | Increase |
| Trial Design | Double blind |
| Trial Length | 1-6 months |
| Number of Subjects | 86 |
| Sex | Male |
| Age Range | 18-29, 30-44 |
| Body Types | Average |
In 100 males, aged 20-40, who were infertile due to low sperm quality; 2g of L-carnitine daily was able to increase sperm quality over the course of 2 months.
Noted that persons with lower sperm quality at baseline had a higher degree of improvement.
