If you take too much zinc for a long time, you could have problems such as lower immunity, low levels of HDL ("good") cholesterol, and low copper levels. Taking very high doses of supplemental zinc can reduce your body's absorption of magnesium.
Health Risks from Excessive Zinc
If used for weeks, doses of 50 mg zinc or more—typically from supplements or excessive use of denture adhesive creams that contain zinc—can interfere with copper absorption (which can cause low copper status), reduce immune function, and lower HDL cholesterol levels [1-3,97].
The upper limit dosage of zinc is 40 milligrams/day for adults. If you take more zinc than you should for a long period, you can have low copper levels, which can affect your nervous system.
Taking too much zinc long-term can cause other health problems, such as a copper deficiency. Always talk to a doctor before starting a supplement, as the mineral can interact with specific medications, including antibiotics and medicines to treat rheumatoid arthritis.
Adverse effects of high zinc intake include nausea, vomiting, loss of appetite, abdominal cramps, diarrhea, and headaches. Intakes of 150–450 mg of zinc per day have been associated with such chronic effects as low copper status, altered iron function and reduced immune function.
Zinc is important for many of the body's functions. Immune system: The body needs zinc to fight off infection. People who don't have enough zinc in their body may be at greater risk of pneumonia and other infections. Children and the elderly are at greater risk.
Higher doses of zinc can lead to vomiting, headaches, diarrhea and exhaustion. Zinc may also interfere with many common prescription medications, including antibiotics, nonsteroidal anti-inflammatory drugs and immunosuppressant drugs.
Adults should avoid taking more than 40 mg of zinc each day. If you accidentally take more than this, it's more likely to cause stomach symptoms than any serious health problems. Check with your healthcare provider if you are considering taking zinc supplements.
The University of Maryland Medical Center cautions that children under the age of 18 should not take any form of zinc supplement unless they are under the supervision of a doctor.
Zinc has anti-inflammatory properties that may help people with acne, rosacea, psoriasis, eczema and wound repair. “Among zinc's plethora of roles, this mineral also aids in wound repair and tissue repair,” Harrison said. “People with skin ulcers and low levels of zinc might benefit from zinc supplements.”
Immunosuppressant medications -- Since zinc may make the immune system stronger, it should not be taken with corticosteroids (such a prednisone), cyclosporine, or other medications intended to suppress the immune system.
Together, zinc and vitamin D in adequate concentrations help maintain a healthy musculoskeletal system and beyond; however, deficiency in either of these nutrients can result in various disorders affecting almost all body systems.
It helps the immune system function properly. Zinc deficiency has been reported to negatively affect immunity and increase the likelihood of infectious diseases, which is a major cause of death in the elderly. Older people tend to have lower zinc levels and low zinc intake.
On average, men and women over 50 need around 10 mg of zinc per day. You'll find zinc in lean red meat, beans, and oysters.
You do not want to overdo it with zinc.
Taking too much zinc will eventually draw down your copper and magnesium levels, both of which can cause health issues. I now find that about 15mg of zinc 3-4 days per week is ideal for me.
Its absorption is most effective on an empty stomach, but it can cause stomach upsets. In this case it should be taken with a meal and therefore not late at night. Zinc competes with iron and calcium for absorption, which is why the recommendation is taken in meals that do not contain dairy products.
It helps to make new cells and enzymes, and plays an important role in processing the nutrients in our food. It's also essential for normal growth and development . Another benefit of zinc is that it helps our immune system function properly, and plays a role in wound healing. Zinc also helps with good eyesight.
Zinc supports hair growth, strengthens hair follicles and increases thickness. Just as zinc deficiency can cause hair loss, so can excess levels of zinc. Taking zinc supplements in moderation with proper medical advice is key.
According to a 2011 review , zinc may improve signs of depression or mood disorder because it helps reduce inflammation, inhibiting brain function and cognitive performance.
Consumption of Zinc helps to have less wake-ups in the night. It is an excellent & safe sleep aid; and also has a calming & antidepressant effect. Along with helping to regulate sleep, Zinc has shown to improve the vividness of dreams.
Magnesium and Zinc are both essential nutrients for health. Magnesium supports muscle relaxation, nerve, heart, and bone health. Zinc is vital for normal growth and development, and supports the body's natural immune defense system. Taking a Magnesium and Zinc supplement together can support well-being.