Replying to Supplements and Skiing

I see pretty widespread supplement use in the majority of most other sports, but I’ve almost never seen it used for skiing. From my experience most skiers have either never thought of it or seem against it.

What about you? What are your thoughts on supplement use in our sport? Would you buy a supplement that:
-Increased your endurance and energy using the correct ratio of complex and simple carbohydrates (quick acting then long lasting energy)
-Decreased muscle and joint fatigue
-Improved ability to perform in high altitudes
-Improved cognitive and brain function

The purpose of this thread is just for personal interest….I think it’s a pretty cool subject