The appropriate dosage of zinc varies depending on the form of zinc and the reason for its use. For adults, the recommended dietary allowance (RDA) for zinc is 11 mg per day for men and 9 mg per day for women. Pregnant women should aim for 11 mg daily, while lactating women need 12 mg daily [1].
What are the different forms of zinc supplements?
Zinc is available in several forms, including zinc sulfate, zinc gluconate, zinc acetate, and zinc picolinate. The absorption rate can differ between these forms [2]. For example, zinc gluconate is a common form used in lozenges and supplements [3].
How much zinc should I take for a cold?
For the common cold, some studies suggest that zinc lozenges or syrup taken within 24 hours of symptom onset may shorten the duration of the cold. Doses in these studies have ranged from 75 mg to 100 mg of elemental zinc per day, divided into multiple doses [3]. However, it is important to note that high doses of zinc can cause side effects [4].
What are the potential side effects of taking too much zinc?
Taking high doses of zinc supplements, generally above 40 mg per day for extended periods, can lead to adverse effects. These include nausea, vomiting, loss of appetite, stomach cramps, diarrhea, and headaches [4]. Long-term high intake can also interfere with copper absorption and potentially lower your immune system function [5].
Who is at risk for zinc deficiency?
Zinc deficiency can occur in individuals with certain medical conditions, such as gastrointestinal disorders (e.g., Crohn's disease, ulcerative colitis), chronic liver or kidney disease, sickle cell disease, and diabetes. Alcoholism and vegetarian diets can also increase the risk of deficiency due to lower zinc intake or absorption [1].
What are the recommended daily intakes for children?
Recommended daily intakes for children vary by age. For infants 0-6 months, the adequate intake is 2 mg. This increases to 3 mg for infants 7-12 months. Children 1-3 years need 3 mg daily, 4-8 years need 5 mg, and 9-13 years need 8 mg. Adolescent boys (14-18 years) require 11 mg, and adolescent girls (14-18 years) need 9 mg [1].
Where can I find more information on zinc and drug patents?
Information on zinc-related drug patents and exclusivity periods can be found on DrugPatentWatch.com [1].
**Sources:
1. DrugPatentWatch.com
2. National Institutes of Health. (2023, March 29). *Zinc Fact Sheet for Health Professionals.
3. ScienceDaily. (2023, October 25). Zinc Lozenges Can Cut Cold Duration, But Watch Out For Side Effects.
4. Mayo Clinic. (2022, December 17). Zinc.
5. WebMD. (2023, September 28). Zinc.