I am a female patient (32 years) of irritable bowel syndrome for the last 10 years. I feel nausea, burning, cramps and pain all the time. After multiple antibiotic courses, I am experiencing extreme food and drug intolerances for the last 5 yrs. Due to this my diet has become very restricted, so I have developed many nutritional deficiencies. I am taking plant based otc supplements for vitamins because I am not able to take allopathic supplements. I want to take zinc supplement, I took zinc sulphate and zinc gluconate. Both caused stomach upset, nausea and loose motions. Which form of zinc is best suitable for me. Is zinc enriched yeast suitable for me.