My understanding is that the cracked heels are a sure sign of candida and leaky gut. The cracking is an external representation of what is happening on the intestinal wall. I have suffered from this condition for years and although you can attempt to heal it by applying antifungals to the area, true healing will only occur if you address the cause. My heels are significantly less cracked after using pineapple to kill off intestinal fungus and parasites. Pineapple is an incredibly underrated food which contains the antifungal, antiviral, anti parasitic bromelain. I have been consuming 1 whole pineapple a day to get its benefits. It also helps improve digestion. Yum!