To heal leaky gut and food allergies I woud drink Gymnema sylvestre tea 3 times a day(reduces candida virulence) and take the best quality colostrum that you can buy. That will greatly help to heal your gut issues. I would also supplement chromium to help utilize and remove excess sugar in the blood. Sugar and carbs feed candida and helps it to spread. I would also use a wide-acting protocol that not only kills candida but will also kill bacteria, viruses, parasites, mycoplasma and mycobacterium. Use a protocol like this one.
Candida is an associative disease. This means that when you get systemic candida then you will most likely also invite a variety of infections from other pathogen species into your body because candida waste toxins have such a strong ability to lower immune system capabilities.
If you are also having digestion problems caused by low stomach acid then you should also take this protocol.