I didn’t cut out sugar completely, but choose as low sugar as possible. For example, most bagels contain around 6 grams of sugar at the supermarkets I go to, but one brand only has 3 grams. So I go with 3 grams, even if zero would be better. My daily sugar in take is still under 30g.

Also, many sports nutrition bars will rely on sugar alcohol, which has its own problems but isn’t (probably) as bad as sugar.