First find the root cause ,why you are having lower testosterone levels. Most of the time this is link to
1.Obesity
2.Higher cholesterol levels
3.Stress
4.Less workouts.
5.Less sex too
6.Lack of sleep
So you need to address above issues.
Natural Alternatives
1. Ashwaganda
2.Make sure to do workouts and lifting
3. Eat proper diets.
4.Maca root powder
* there may be more
1.Obesity
2.Higher cholesterol levels
3.Stress
4.Less workouts.
5.Less sex too
6.Lack of sleep
So you need to address above issues.
Natural Alternatives
1. Ashwaganda
2.Make sure to do workouts and lifting
3. Eat proper diets.
4.Maca root powder
* there may be more