Selenium is a hint mineral that you simply naturally discover within the soil. Our physique wants it in minimal quantities. Selenium is crucial for replica, correct functioning of the thyroid gland, safety from infections, DNA synthesis, and defending the cells from oxidative stress brought on by free radicals. Brazil nuts comprise the very best focus of selenium. Different meals like nuts, seeds, meat and grains additionally comprise cheap quantities of selenium. Toddler formulation are fortified with selenium to make sure infants obtain them in ample quantities.

Selenium focus in meals relies on the soil it grows in. 1817 is the yr of its discovery, and it was initially thought-about a tellurium compound. Nevertheless, it will definitely obtained medical consideration attributable to its toxicity to industrial workers. Selenium has additionally been toxic to animals that eat high-selenium crops. So an extra of this may be doubtlessly dangerous to well being. 

Regardless of selenium’s useful results on human well being, consuming it in required quantities is crucial. Nevertheless, taking extra selenium might lead to hostile well being outcomes.

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Science-Primarily based Well being Advantages of Selenium

1. Reduces Threat of Prostate Most cancers

Many elements akin to outdated age, weight problems, genetics can play a job in growing prostate most cancers. As well as, folks with prostate most cancers might endure from lack of bladder management, erectile dysfunction and so forth. 

A analysis examine discovered that ample selenium ranges within the physique scale back the danger of growing prostate most cancers amongst males. Selenium prevents prostate most cancers by slowing the event and unfold of most cancers cells. Selenium ranges within the blood and tissues are all inversely associated to the danger of prostate most cancers.

Analysis has additionally proven that selenium reduces the danger of a number of different cancers akin to breast, colon and lung cancers.

2. Selenium Comprises Antioxidative Properties

The manufacturing of free radicals in our physique outcomes from publicity to toxins within the setting. As well as, metabolic features within the physique additionally produce them. When the manufacturing of those free radicals is in extra, they hurt the tissues and organs. Antioxidants play a vital function in lowering the injury brought on by free radicals within the physique. For instance, selenium is a widely known antioxidant nutrient.

A examine demonstrates that selenium consumption would possibly scale back the markers of oxidative stress. As well as, it will increase the antioxidative exercise, thereby lowering the free radical injury.

3. Reduces Threat of Coronary heart Illness

We all know that coronary heart illness happens attributable to poor dietary habits, genetics, lack of bodily exercise, smoking, excessive levels of cholesterol and lots of different causes. If not handled, it ends in a number of severe well being outcomes akin to stroke, cardiac failure, and many others.

Research have proven that selenium consumption is related to a lowered threat of coronary heart illness. Selenium is a potent antioxidant. It acts on the center by defending it towards the injury brought about attributable to free radicals. Selenium additionally works by lowering irritation by stopping oxidative injury to the lipids and clogging of arteries. Subsequently, selenium reduces the danger of coronary heart illness and stroke.

4. Selenium Delays Onset of Alzheimer’s Illness

Alzheimer’s illness happens when a decline in mind perform ends in reminiscence loss. The commonest causes of Alzheimer’s illness are life-style, setting and genetics. Because the situation worsens, it could actually trigger difficulties in talking, studying and remembering.

Totally different states of selenium have neuroprotective results. A examine demonstrates that selenium’s antioxidant properties assist shield the mind from injury attributable to free radicals. Thereby, it delays the event of Alzheimer’s illness.

The Mediterranean eating regimen popularly utilized in many ailments consists of meals wealthy in selenium akin to nuts, seeds and seafood. These meals are additionally useful in lowering the danger of Alzheimer’s illness.

5. Helps Deal with Thyroid Issues

Thyroid hormone fluctuation results in hypothyroidism, Grave’s illness, Hashimoto’s thyroiditis, and many others. As well as, your progress and improvement will be affected in case your thyroid gland doesn’t perform correctly. For instance, it could lead to hair loss, weight reduction, irregular menstrual cycle, gradual progress, tiredness and lots of extra.

The thyroid gland incorporates the very best quantities of selenium in its tissues. As we already know, metabolic features such because the secretion of thyroid hormones can produce free radicals. Selenium protects the thyroid gland from oxidative stress. A examine has discovered that selenium might enhance thyroid issues.

6. Reduces Irritation

Selenium improves the immune response. A examine discovered that the selenoprotein fashioned from dietary selenium reduces the inflammatory response. These are related to a number of ailments akin to allergy, bronchial asthma, inflammatory bowel illness, and many others. It acts by lowering the over-activation of the immune system. It additionally strengthens the physique’s immunity towards infectious pathogens that trigger influenza and tuberculosis.

7. Aids in Weight Loss

Unhealthy weight achieve can result in a number of well being points akin to weight problems and coronary heart illness. Selenium performs a significant function in metabolism because it regulates the features and secretion of thyroid hormones. A examine reveals that ample selenium consumption might assist keep a wholesome metabolic price. Subsequently, acceptable quantities of selenium consumption result in weight reduction. Nevertheless, when taken above the usual necessities, selenium can have fairly the alternative impact.

8. Selenium Improves Pores and skin Well being

The predominant reason behind speedy pores and skin ageing is publicity to daylight, smoke and different environmental pollution. It can lead to the event of zits, wrinkles and uninteresting pores and skin.

Research have discovered selenium to be useful in stopping and treating pores and skin issues akin to psoriasis. It has antioxidant properties. Therefore, selenium protects the pores and skin from oxidative injury brought on by solar publicity.

9. Prevents Untimely Start

Vitamins akin to zinc, selenium, iron, folate are important for the wholesome progress and improvement of the infant throughout being pregnant. Research have discovered that selenium is essential for a child’s wholesome beginning. Consumption of acceptable quantities of selenium prevents hostile being pregnant outcomes akin to untimely beginning and foetal progress restriction.

10. Might Enhance Fertility

Some analysis research recommend that selenium consumption enhance fertility in ladies. As well as, selenium helps improve reproductive perform by protecting follicular fluid wholesome. It’s also useful in enhancing sperm depend and motility in males.

Selenium Deficiency

Selenium is crucial for the correct functioning of the thyroid gland and lots of different methods in our physique. Low ranges of selenium might disrupt the conventional processes and should result in:

  • Fatigue
  • Hair loss
  • Mind fog
  • Weakened immunity
  • Weak muscular tissues
  • Infertility 

The deficiency of selenium can result in particular illness circumstances. 

Keshan Illness

Keshan illness is a harmful dysfunction that, if left untreated, can result in heart problems, stroke, or dying. You’ll be able to deal with Keshan illness or management it, however it’s not curable. It generally happens in ladies and kids. Research recommend that it could actually happen attributable to selenium deficiency. Generally it’s mixed with microbial an infection.


  • Nausea
  • Vomiting
  • Lack of urge for food
  • Dizziness
  • Chills
  • Irregular heartbeat
  • Fatigue
  • Irritation
  • Hair loss

In worst instances, it could result in extreme problems, akin to:

  • Cough with blood
  • Extreme shortness of breath
  • Congestive coronary heart failure
  • Fainting
  • Palpitation
  • Stroke

Kashin Illness

It’s a joint and bone dysfunction related to low selenium ranges. Nevertheless, the reason for this illness can be attributable to different elements. It generally happens in kids. Research present that individuals affected with this illness usually have decreased progress and bone abnormalities.


  • Ache and stiffness in joints
  • Incapacity to maneuver joints
  • Enlarged joints

Folks of all age teams ought to take the advisable doses of selenium. It’s going to assist them with correct progress and improvement. Nevertheless, it’s important to make sure that you don’t eat in extra. Additionally, it’s preferable to take selenium together with a meal slightly than on an empty abdomen. The advisable consumption needs to be:

  • 0-6 Months: 15mcg
  • 7 months-3 years: 20mcg
  • 4-8 years: 30mcg
  • 9-13 years: 40mcg
  • 14 years and above: 55mcg
  • Pregnant ladies: 60mcg
  • Breastfeeding ladies: 70mcg

Meals Sources of Selenium

Selenium: Beneficial Role in Health, Sources And Possible Side Effects- HealthifyMe

1. Brazil Nuts

They’re wealthy in vitamins and antioxidants. Brazil nuts have the very best selenium content material and comprise cheap quantities of zinc. As well as, a examine reveals that consuming a single serving of Brazil nuts can acutely enhance the serum lipid profile of wholesome volunteers. That’s as a result of they’re nutritious and assist enhance coronary heart well being. In addition they assist the wholesome functioning of the opposite organs, such because the mind and kidneys.

Dietary Values

As per USDA, 100g of brazil nuts comprise:

  • Power: 659kcals
  • Carbohydrates: 11.7g
  • Protein:14.3g
  • Fats: 67.1g
  • Fibre:7.5g
  • Calcium: 160mg
  • Iron: 2.43mg
  • Zinc: 4.06mg
  • Selenium: 1920µg

2. Tuna

Tuna is a wonderful supply of high-quality protein. It’s low in energy and fats and helps construct muscle whereas lowering physique fats. As well as, they’re extremely nutritious as they comprise cheap quantities of calcium, B advanced nutritional vitamins, and many others.

Dietary Values

As per USDA, 100g of tuna incorporates:

  • Power: 85kcals
  • Carbohydrates: 0.08g
  • Protein:19g
  • Fats: 0.6g
  • Calcium: 18mg
  • Iron: 1.67mg
  • Zinc: 0.66mg
  • Selenium: 67.8µg

3. Turkey

Turkey is one other excessive protein but low carb meals. It is stuffed with B advanced nutritional vitamins, zinc and selenium. It may make a scrumptious and wholesome aspect to most of your lunch dishes.

Dietary Values

As per USDA, 100g of turkey incorporates:

  • Power: 213kcals
  • Carbohydrates: 0g
  • Protein:27.1g
  • Fats: 10.4g
  • Calcium: 31mg
  • Iron: 1.56mg
  • Zinc: 3.77mg
  • Selenium: 28.4µg

4. Cottage Cheese

Cottage cheese is a sort of curd cheese. It’s scrumptious and wholesome and has low fats, excessive protein, selenium, calcium and lots of different vitamins. You’ll be able to add them to your salads, eggs, toast, and a lot extra.

Dietary Values

As per USDA, 100g of cottage cheese incorporates:

  • Power: 82kcals
  • Carbohydrates: 4.31g
  • Protein: 11g
  • Fats: 2.3g
  • Calcium: 103mg
  • Iron: 0.13mg
  • Zinc: 0.61mg
  • Selenium: 14.6µg

5. Sunflower Seeds

Sunflower seeds assist regulate the menstrual cycle, scale back coronary heart ailments, and enhance immunity. Nevertheless, they’re excessive in energy, and you need to eat them sparsely.

Dietary Values

As per USDA, 100g of sunflower seeds comprise: 

  • Power: 657kcal
  • Carbohydrates: 17.1g
  • Protein: 21g
  • Fats: 56.1g
  • Calcium: 78mg
  • Iron: 5.2mg
  • Zinc: 6mg
  • Selenium: 80.4µg

Attainable Facet Results & Precautions of Selenium

Taking selenium dietary supplements based on a doctor’s prescription is advisable. Nevertheless, it’s important to be cautious. Consumption mustn’t cross the secure higher limits. These higher limits are:

  • 0-6 months: 45mcg
  • 7-12 months: 46mcg
  • 1-3 years: 90mcg
  • 4-8 years: 150mcg
  • 9-13 years: 280mcg
  • 14 years and above: 400mcg

Thyroid Issues

Taking selenium would possibly make hypothyroidism worse. It happens primarily in individuals who’re poor in iodine. On this case, you need to take iodine and selenium collectively. Seek the advice of your doctor for acceptable dosage and remedy.

Sperm Motility

Although research recommend selenium improves fertility, it’s important to notice that taking selenium in extra can have the alternative impact. It’s as a result of selenium limits the capability of sperm to maneuver, thereby reducing fertility. Subsequently, eat selenium throughout the tolerable higher limits solely.

Selenium can Trigger Kidney Illness

Extreme consumption of selenium will be doubtlessly dangerous to the kidney. Subsequently, it’s important to eat selenium inside secure limits in sufferers with kidney failure or folks present process dialysis. Research have discovered that extreme selenium consumption might lead to acute renal failure.

Being pregnant

Case research have discovered that top ranges of selenium consumption might result in congenital disabilities in infants. It might additionally result in problems within the being pregnant. Therefore, it’s important to eat selenium inside tolerable limits.

Different Medicines

Selenium dietary supplements intrude with a couple of medicines when taken collectively. One such remedy is warfarin. Research present that selenium might alter the exercise of warfarin. Subsequently, it will assist for those who mentioned together with your doctor earlier than consumption.


Research present that selenosis happens attributable to a excessive selenium consumption. For instance, it may be attributable to elevated consumption of selenium-rich meals akin to brazil nuts. It might additionally happen attributable to meals grown in soil with excessive selenium content material or extreme selenium supplementation.


  • Nausea
  • Vomiting
  • Discolouration of nail
  • Brittle nails
  • Hair loss
  • Fatigue
  • Irritability
  • Foul odour or ‘garlic breath.’

The Backside Line

Selenium is essential for everyday features carried out by our physique. Nevertheless, extra consumption of selenium can result in dangerous results. Each selenium deficiency and toxicity can contribute to hostile well being outcomes. Subsequently, it’s important to be cautious when choosing a selenium complement. One ought to all the time seek the advice of a doctor and focus on the advantages and unintended effects of taking a complement. It’s also important to avoid any medication interacting with selenium dietary supplements.

Incessantly Requested Questions (FAQs)

1. What does selenium do for the physique?

A. Selenium performs a big function within the correct functioning of the thyroid gland, reproductive system and protects the physique from infections. As well as, it helps enhance pores and skin and coronary heart well being and helps enhance pores and skin.

2. Is it secure to take selenium day-after-day?

A. Sure, you may take selenium safely day-after-day so long as it stays throughout the tolerable higher restrict. Above the secure restrict could also be dangerous to the physique. It might trigger hostile results akin to nausea, vomiting, irritability, and many others.

3. What are the signs of selenium deficiency?

A. Selenium deficiency could cause signs like weak immunity, hair loss, muscle weak spot, nausea, vomiting, fatigue, infertility and mind fog.

4. How a lot selenium must you take each day?

A. You’ll be able to eat selenium-rich meals like brazil nuts, rooster, turkey and tuna to get an ample quantity of selenium. The advisable dose varies as per age and medical circumstances. It’s as follows:

  • 0-6 Months: 15mcg
  • 7 months-3 years: 20mcg
  • 4-8 years: 30mcg
  • 9-13 years: 40mcg
  • 14 years and above: 55mcg
  • Pregnant ladies: 60mcg
  • Breastfeeding ladies: 70mcg

5. What’s the aspect impact of selenium?

A. Selenium imparts numerous well being advantages to you when taken sparsely. Nevertheless, an elevated selenium consumption can lead to hostile well being outcomes akin to foul odour or “garlic breath”, discolouration of nails, brittle nails, nausea, vomiting, fatigue and hair loss.

6. Does selenium trigger weight achieve?

A. No, consuming selenium in ample quantities helps in shedding pounds. It is because of selenium’s function in regulating thyroid perform and metabolism. Nevertheless, some research have proven that extreme consumption of selenium might trigger a rise in weight. 

7. What meals are excessive in selenium and zinc?

A. Meals akin to brazil nuts, rooster, turkey, tuna and cottage cheese are selenium-rich meals. As well as, meals like meat, shellfish, legumes, seeds, nuts, dairy and a few greens are wonderful sources of zinc.

8. Is selenium good for the prostate?

A. Sure, selenium delays and reduces the danger of prostate most cancers. It really works by stopping the expansion and unfold of cancerous cells to different organs and tissues. Selenium ranges within the blood and tissues are all inversely associated to the danger of prostate most cancers.

9. What time is finest to take selenium?

A.You’ll be able to take it at any time of the day. Nevertheless, you need to eat selenium dietary supplements with different meals and never on an empty abdomen.

10. Is selenium appropriate for sperm manufacturing?

A. Sure, research have discovered that taking an ample quantity of selenium can enhance sperm motility and depend in males. As well as, selenium helps improve reproductive perform by protecting follicular fluid wholesome.

11. Can selenium increase PSA?

A. No, Research have discovered that consumption of acceptable quantities of selenium can scale back PSA, thus lowering the danger of prostate most cancers.

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