You should have a blood test done for zinc before taking any supplement. Why? Because zinc interferes with the absorption of calcium, iron, and other minerals - so, if you have to take it, don't take it with any other supplement.
My daughter was fine with Zinc at first, but because iron supplements interfere with absorption of zinc, her zinc went down.
Then she took zinc and the iron went down.
Now, she takes 27 mg iron every day. Every other day she takes 54 mg iron and then, at least three hours later, 10 mg zinc.
The blood tests now show her zinc is fine and the iron is rising.
Each person's body is different, and there is no way of knowing whether a patient is benefiting or getting worse UNLESS lab results are checked after a month or two after changes in supplementation.
Daughter (22) Dx'd Crohn's 3/06. Misdiagnosed for two years, including by top pediatric Crohn's specialist as stress. No symptoms for the past two years. Recent colonoscopy shows stricture gone but still two spots of inflammation in TI. Used LDN to taper off Entocort. Was on Entocort since April 06. Never had D. 4.5 mg LDN, SCD multivit, homemade yogurt, 5000IU vit D3, 500 mg calcium, 27 mg iron, monthly B12 shots, daily oral B12 1000. SCD diet modified to include potatoes and rice.