If consuming these foods and minerals you should try and take the zinc supplement at least two hours before or after Gans says. Taking zinc before bed can improve your sleep quality and if a zinc supplement is necessary for you there there are many health benefits of taking zinc before sleeping. Here S A Friendly User S Guide For The Timing Of Nutritional Supplements Conscious Life News Supplements Nutritional Supplements Vitamin D Vitamins While zinc is considered a trace mineralmeaning its only needed in small amountsits especially important to consume enough of it during times of rapid growth like childhood and pregnancy. . Read customer reviews find best sellers. Calcium and magnesium can be taken in the evening with food or before bedtime. Upper level for Zinc is 40 mg a day for an adult. Zinc should not be taken with calcium or other than iron and it is most effective if taken earlier in the day. However if zinc supp...