Taking zinc daily, especially in high doses (over 40mg/day), can cause short-term issues like nausea, vomiting, headaches, and diarrhea, but long-term excessive intake can lead to serious problems such as copper deficiency, weakened immunity, and low "good" HDL cholesterol, potentially causing neurological symptoms like numbness or weakness in limbs. While zinc from food is generally safe, supplements can interfere with copper absorption, so it's crucial to stay within recommended limits and consult a doctor for personalized advice, particularly if taking other medications.
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.
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.
Signs of too much zinc include nausea, dizziness, headaches, upset stomach, vomiting, and loss of appetite. If you take too much zinc for a long time, you could have problems such as lower immunity, low levels of high-density lipoprotein (HDL) (good) cholesterol, and low copper levels.
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).
In general, they're likely the result of tired muscles and nerve problems. The risk of having night leg cramps increases with age. Pregnant people also are more likely to have night leg cramps. Kidney failure, diabetic nerve damage and problems with blood flow are known to cause night leg cramps.
Research Note: Studies show significantly lower zinc levels in people with rheumatoid arthritis compared to those without it. The lowest levels are associated with more severe disease. Researchers say zinc may help improve RA symptoms by supporting the immune system and cartilage.
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.
As it dissolves, the heavy concentration of zinc could irritate the stomach lining in that area, leading to pain or discomfort in addition to nausea or the risk of vomiting. Fortunately, there's an easy way to avoid this possibility. Just take a zinc supplement with your food instead.
Among the micronutrients, zinc is essential in the elderly in terms of its impact on biological, biochemical and immune functions (Shankar and Prasad 1998; Mocchegiani et al.
Taking zinc supplements by mouth long-term and in high doses can lead to copper deficiency. People with low copper levels might have brain and nervous system issues. Those issues may include numbness and weakness in the arms and legs.
If you are deficient in zinc, you may notice sensitivity to smell, changes in taste, and a white tongue coating and you may be prone to mouth ulcers and gingivitis - most commonly seen in people who are low in zinc in their diet. A lack of zinc in your diet can also cause recurring mouth ulcers.
Zinc is an important cofactor in the body and is essential for normal function; however, increased levels of zinc can become toxic. Three types of exposure can lead to toxicity: inhalation, oral, and dermal.
Foods rich in calcium and certain plant compounds can interfere with zinc absorption. Calcium, alcohol, and certain plant compounds, like lectins, tannins, and phytates, or phytic acid, can make it harder for your body to absorb zinc.
Zinc disadvantages primarily stem from excessive intake, causing short-term issues like nausea, vomiting, diarrhea, headaches, and loss of appetite, with long-term high doses leading to serious problems like copper deficiency (causing neurological issues, anemia), reduced immune function, and lower "good" HDL cholesterol. It can also interact with medications and cause temporary loss of smell if inhaled via nasal sprays.
Avoid using nose sprays containing zinc. Pregnancy: Zinc is likely safe when used in the recommended amounts while pregnant. But it is likely unsafe when used in high doses. Those over 18 should not take more than 40 mg of zinc daily, and those 14-18 years old should not take more than 34 mg daily while pregnant.
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.
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 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.
The researchers found that zinc affects the muscles, endothelial cells, and sensory nerves together, reducing the amount of calcium in the muscles and causing them to relax. This, in turn, results in increased blood flow and lower blood pressure. Dr.
Research indicates that magnesium helps regulate the parasympathetic nervous system, promoting feelings of calm and relaxation. Additionally, studies involving zinc supplementation in humans and animals suggest that higher blood zinc concentrations correlate with better sleep quality.
Key Points. Acute pain in multiple joints is most often due to inflammation, gout, or the beginning or flare up of a chronic joint disorder. Chronic pain in multiple joints is usually due to osteoarthritis or an inflammatory disorder (such as rheumatoid arthritis) or, in children, juvenile idiopathic arthritis.
The Role of Vitamin D
Furthermore, some research suggests that vitamin D deficiency may be linked to an increased risk and severity of osteoarthritis, a common cause of joint pain. Ensuring adequate vitamin D levels through sunlight exposure, diet, or supplementation can be a crucial step in managing joint discomfort.
Not enough zinc can weaken your immune system, causing more inflammation and knee pain. Taking zinc can help with joint health and recovery from injuries. You can find zinc in oysters, beef, chicken, pork, and some cereals. It's important to get enough zinc to keep your immune system strong and your joints healthy.