I too am an adult and tried GSH with virtually no positive results. I followed protocol and divided doses 50/50 between inhaled and ingested. I felt I gave it adequate time, but never experienced most of the great things others have posted. Instead, I now kick ass in the gym and am focused on going beyond what I think I can do. I've learned you can always do more than you think you can. My advice to parents is to keep their kids active....even if you think it's killing them, it may be teaching them to persevere. Perseverance is what this disease is all about. If you're an adult and have yet to embrace exercise, well it's time you did.