Zinc, an essential mineral that is vital to building DNA and RNA, also helps produce energy and regulate your immune system. Zinc is found in meat, cheese, seafood, eggs and grains. Zinc supplements are a popular remedy to alleviate cold symptoms, and are also prescribed to people with zinc deficiencies. The American Cancer Society notes that zinc sulphate supplements may be of use in treating sickle cell disease. However, excessive amounts of zinc can have serious side effects. Consult your doctor before taking zinc supplements.
Zinc Recommended Daily Values
The Office of Dietary Supplements states that the recommended dietary allowance of zinc is 11 mg per day for men, as well as for pregnant women; 8 mg per day for women; and 12 mg for nursing mothers. The ODS advises that you should not ingest more than 40 mg a day of zinc, whether from foods, supplements, or a combination of both. The American Cancer Society states that taking zinc in the amount of 150 mg to 450 mg a day is associated with low copper levels, impaired immune function, anemia, low levels of HDL, or "good" cholesterol, increased risk of prostate cancer and urinary infections, and changes in the way iron works in the body.
Zinc Toxicity
A single excessive dosage of zinc sulphate can cause zinc overdose, as can taking large amounts for prolonged periods of time. According to the National Institutes of Health, symptoms of zinc poisoning include nausea and vomiting, fever, low blood pressure, convulsions, metallic taste in the mouth, lack of urinary output, jaundice, collapse and shock. The University of Maryland Medical Center states that adverse effects from zinc can include dizziness, headache and increased sweating. If you think you are suffering from a zinc sulphate overdose, seek emergency medical treatment.
Copper Deficiency
Excessive zinc can reduce your absorption of copper. According to Copper.org, this mineral is needed for normal metabolic processes, and is especially important for repair of connective tissues and for heart health. The University of Maryland Medical Center cautions that high doses of zinc can cause copper deficiency, and advises taking a copper supplement if you take zinc sulphate supplements.
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