Taking zinc daily can be beneficial for immune function, growth, and wound healing if levels are adequate, but consistently exceeding the 40 mg daily upper limit (UL) for adults can lead to side effects like nausea, headaches, and appetite loss, and chronically high doses can cause copper deficiency, lowered "good" cholesterol (HDL), and weakened immunity by interfering with copper absorption and affecting magnesium balance.
According to the National Institutes of Health, 40 mg of zinc a day is the upper limit of a daily dose of zinc taken by mouth for all people age 19 and older. For people 18 and younger, the upper daily limit of zinc varies depending on age.
Both vitamin C and zinc are two of the many essential vitamins and minerals the body needs for optimum health but are especially important during pregnancy. These vitamins and minerals not only help foetal growth but support the immune system to support pregnancy outcomes for both the parent and the growing baby.
Ultimately, zinc can and does cause nausea if you eat too much of it or if you consume zinc from the wrong sources. However, you shouldn't stop taking a zinc supplement or eating foods with zinc in them altogether; the key idea is to simply absorb the right amount of zinc.
If you swallow too much zinc, the first symptoms you may experience are gastrointestinal side-effects such as nausea, vomiting, and abdominal pain. Diarrhea and muscle cramps are also possible. As time passes, you may experience sleepiness, dizziness, or fatigue (Bartzatt, 2017; Agnew, 2021).
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.
Frequent muscle cramps can signal a deficiency in essential nutrients such as calcium, magnesium, potassium, sodium, vitamin D, and B vitamins. Pay close attention to your diet to address nutrient deficiencies and prevent cramps.
People who consume too much zinc may have nausea, vomiting, and diarrhea. Inhaling zinc oxide fumes can cause rapid breathing, sweating, fever, muscle aches, and a metallic taste in the mouth—a disorder called metal fume fever.
Zinc is a mineral that supports overall health. It's found in many foods and drinks, and is also available as a dietary supplement. Taking too much zinc can cause side effects like diarrhea, stomach pain, and vomiting. It's possible to overdose on zinc supplements.
Recommended time to take: On an empty stomach to maximize absorption, typically in the morning or between meals in the afternoon. Avoid taking it with high-calcium foods or other competing minerals.
Zinc is a critical component in a number of conserved processes that regulate female germ cell growth, fertility, and pregnancy.
Zinc remains in the system for about two weeks after supplementation has stopped. It is a common supplement taken to shorten the duration of a cold, support the immune system, and encourage wound healing.
Zinc can help to regulate hormone balance, and as we discussed hormone imbalance is a key cause of acne during pregnancy. It can also help with carrying vitamin A to the skin and with the renewal of skin cells.
Early symptoms of zinc deficiency include a loss of appetite and, in infants and children, slowed growth and development. People may lose their hair in patches. They may feel sluggish and irritable. Taste and smell may be impaired.
Overall, the current scientific literature suggests a relationship between zinc and anxiety. Most of the evidence shows that there is an association between zinc deficiency and anxiety, and that zinc repletion may alleviate the symptoms. However, other studies show that there is no connection.
There is no guarantee that zinc will help you feel better faster. In some studies, zinc did nothing to shorten how long people with colds felt bad. In other studies, zinc may have shortened symptoms by a few days. But the side effects from taking zinc can be uncomfortable or serious in some cases.
As the brain regenerates during sleep, a zinc deficiency can lead to a decrease in sleep quality. Like magnesium, zinc contributes to the transformation of tryptophan into serotonin and then into melatonin, the sleep hormone.
Because zinc affects so many systems in the body, there is no single distinct symptom of zinc deficiency. Some of the more common symptoms include loss of or diminished smell and taste, poor wound healing, hair loss, roughening of skin/rashes, low libido (men), canker sores, lethargy, and deformed nails.
Although rare, some individuals, such as those with a history of stomach surgery or prolonged intravenous nutrition, may be at an increased risk for copper deficiency. If you fall into this category, you should avoid taking a zinc supplement because it could decrease your copper levels even more.
Other health issues that can sometimes be linked to night leg cramps include:
Here are 10 unexpected signs of a vitamin D deficiency that may surprise you.
For leg cramps, drink fluids with electrolytes like coconut water, milk, or sports drinks (Gatorade, Pedialyte), focusing on potassium and sodium, but plain water is also key for dehydration; consider a small amount of pickle juice for rapid relief if needed, and avoid dehydrating drinks like alcohol and excessive caffeine.
Those who take high doses of zinc supplements can experience a lack of anagen development, which causes hair loss, but at the same time, one form of zinc treatment can actually encourage hair growth.
Zinc is known to be essential for all highly proliferating cells in the human body, especially the immune system.
Zinc can be toxic when someone takes too much. Symptoms of a zinc overdose include nausea, vomiting, stomach pain, and diarrhea. Some people can develop a mild zinc allergy with symptoms including rash and itching. Severe allergic reactions to zinc can also occur.