Can taking selenium be harmful?

Taken at normal doses, selenium does not usually have side effects. An overdose of selenium may cause bad breath, fever, and nausea, as well as liver, kidney and heart problems and other symptoms. At high enough levels, selenium could cause death.

Is it safe to take selenium everyday?

When taken by mouth: Selenium is likely safe when taken in doses less than 400 mcg daily, short-term. But selenium is possibly unsafe when taken in high doses or for a long time. Taking doses above 400 mcg daily can increase the risk of developing selenium toxicity.

Can too much selenium be harmful?

Extremely high intakes of selenium can cause severe problems, including difficulty breathing, tremors, kidney failure, heart attacks, and heart failure. The daily upper limits for selenium include intakes from all sources—food, beverages, and supplements—and are listed below.

Is 200 mcg of selenium too much?

Although some studies have used doses of 200 mcg, there is some evidence that this amount could increase your risk for diabetes. DO NOT exceed the upper tolerable limit of 400 mcg. Remember that you may also get some selenium in the foods you eat. Over time, high doses of selenium can be toxic.

What effect does selenium have on the body?

Selenium plays an important role in the health of your immune system. This antioxidant helps lower oxidative stress in your body, which reduces inflammation and enhances immunity. Studies have demonstrated that increased blood levels of selenium are associated with enhanced immune response.

Can you take zinc and selenium together?

Zinc and selenium work great together, working with what is known in biology as a synergistic effect. The synergistic effect is when the interaction between chemical substances cause an effect that is greater than the sum of the individual effect of any of the substances.

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Should I take selenium in the morning or at night?

intake of selenium: the best time of day

Taking it is independent of the time of day. However, selenium in the form of dietary supplements should always be taken with a meal if you have problems taking capsules and tablets on an empty stomach.

Is 400 mg of selenium too much?

The safe upper limit for selenium is 400 micrograms a day in adults. Anything above that is considered an overdose.

Why should I take selenium?

It is found naturally in foods or as a supplement. Selenium is an essential component of various enzymes and proteins, called selenoproteins, that help to make DNA and protect against cell damage and infections; these proteins are also involved in reproduction and the metabolism of thyroid hormones.

How long does selenium stay in your system?

Selenium only builds up to a significant degree in the thyroid gland. Most remaining selenium in your body is usually excreted within 24 hours.

How do you know if you need selenium?

Signs of too much selenium include a garlic-like odor on your breath and a metallic taste in your mouth. When foods high in selenium aren’t an option, selenium supplements can also help.

How do you know if you are low in selenium?

Diagnosing selenium deficiency can be done with a blood test, which indicated recent selenium intake. Hair or nail samples can also be taken which gives a better indication of long-term selenium status.

How do you know if you have too much selenium?

Selenium toxicity can occur with acute or chronic ingestion of excess selenium. Symptoms of selenium toxicity include nausea; vomiting; nail discoloration, brittleness, and loss; hair loss; fatigue; irritability; and foul breath odor (often described as “garlic breath”). Selenium is found in the environment in soil.

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Can selenium cause weight gain?

Chemist Wayne Chris Hawkes prepares to test a rice sample from China for selenium content. Meals rich in selenium may slow the rate at which your body burns calories, ARS researchers report. This preliminary result is based on a 4-month study of 11 healthy men.

What is the best form of selenium to take?


All forms of selenium are well absorbed, but absorption of selenomethionine is the best.

What foods are high in selenium?

Selenium and Healthful Diets

  • Many whole grains and dairy products, including milk and yogurt, are good sources of selenium. …
  • Pork, beef, turkey, chicken, fish, shellfish, and eggs contain high amounts of selenium.

Which vegetable is high in selenium?

Some vegetables that contain more than 2 micrograms of selenium per cupful include raw broccoli, cooked plantains, cooked Brussels sprouts, cooked fresh spinach and shelled soybeans. Asparagus provides close to 4 micrograms in four cooked spears.

How much selenium should I take daily for thyroid?

The Food and Nutrition Board (FNB) at the Institute of Medicine of the National Academies recommends that healthy people age 14 years and older get 55 mcg of selenium daily from all sources. The recommendation goes up to 60 mcg per day if you’re pregnant and 70 mcg per day if you’re breastfeeding.

Is selenium good for hair?

Brazil nuts are an excellent source of selenium, a mineral that may help boost hair growth. Authors of a scientific review note that selenium is involved in creating hair. They report that newly forming hair takes up selenium after receiving trace elements from the blood.

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Does selenium prevent GREY hair?

Even then, only certain nutrients have been repeatedly proven to stop or slow down grey hair in supplement form: Iron, vitamin D, folate, vitamin B12, and selenium were all recommended by Almohanna, Ahmed, Tsatalis and Tosti, authors of a comprehensive review on premature grey hair.

Does selenium help you sleep?

Researchers found that individuals who consume enough selenium have a significantly lower risk of having difficulty falling asleep. A study looking at nutrition and sleep found that selenium was associated with a 20% lower risk of having difficulty falling asleep.