If someone was training at a high level of endurance exercise i.e 60 - 80 miles per week of steady running plus interval training and 2 x gym work weekly I presume it would be no issue having
a pretty high carbohydrate intake i.e. 400 - 500g per day without affecting the skin provided they were coming 95 % of the time from antioxidant rich fruits, tubers and root vegetables?
It's a
pretty simple philosophy: alternate low and
high quantities of
carbohydrates on different days, while eating adequate protein
intake and moderate amounts of fat in the diet.