At first I really loved the product as I felt it gave me energy ...

I bought this product since I was training for a marathon. At first I really loved the product as I felt it gave me energy for my long runs. But then as I continued to consume the product it would make my stomach uneasy and gassy. I felt like I had to stop to burp every so often to feel good to continue running. I still like it for short distances but for long distances not sure if it's the product for me.

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