Magnesium 300mg:

According to the official health claims from the European Food Safety Authority (EFSA):

• Magnesium contributes to the reduction of tiredness and fatigue, the balance of electrolytes, the normal functioning of muscles, the nervous system, and normal psychological function. 
• Vitamin B6 contributes to the normal metabolism of proteins and glycogen, as well as the regulation of hormonal activity.

Vitamin C 500mg:

According to the official health claims from the European Food Safety Authority (EFSA):

• Vitamin C can accelerate muscle recovery and growth as it is directly involved in collagen production (builds muscle tissue).
• Helps reduce tiredness and fatigue.
• Enhances the protection of cells from oxidative stress.
• Supports the proper functioning of the immune system.