What are the disadvantages of zinc?
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Signs of too much zinc include nausea, vomiting, loss of appetite, stomach cramps, diarrhea, and headaches. When people take too much zinc for a long time, they sometimes have problems such as low copper levels, lower immunity, and low levels of HDL cholesterol (the "good" cholesterol).
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Taking 15 mg of zinc along with 1 mg of copper each day may possibly help to prevent or delay the onset of grey hair. ... These foods take away energy, cause wrinkles, unattractive skin, grey hair, and premature old age.
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#9: Frequent brain fog A study at the University of Toronto showed that zinc has a key role in regulating how neurons communicate. A lack of zinc can lead to foggy thinking and memory problems.
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Health authorities have set the tolerable upper intake level (UL) for zinc at 40 mg per day for adults. The UL is the highest recommended daily amount of a nutrient. For most people, this amount is unlikely to cause negative side effects ( 1 , 2).
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In some people, zinc might cause nausea, vomiting, diarrhea, metallic taste, kidney and stomach damage, and other side effects. Using zinc on broken skin may cause burning, stinging, itching, and tingling. Zinc is POSSIBLY SAFE when taking by mouth in doses greater than 40 mg daily.
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Zinc plays an important role in axonal and synaptic transmission and is necessary for nucleic acid metabolism and brain tubulin growth and phosphorylation. Lack of zinc has been implicated in impaired DNA, RNA, and protein synthesis during brain development..
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