Our son was an excellent swimmer, but when he went through reactions to all food, his training had a huge impact.
After seeing a specialist for years, we tried to work out which food was causing these problems to materialise. After a while, his diet was limited to lamb, turkey, fish, broccoli, brussel sprouts, cabbage, glucose and sucrose, together with the Elemental 028. It affected his training and didn't give him enough energy to accomplish what he needed to.
After going through all this, his grandfather discovered SuperStarch. From that moment on, energy for training was not a problem. In the absence of a UK source, we went into business and became the supplier in this country.