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Iodine’s role in child growth, metabolism, and fertility

 Iodine’s role in child growth, metabolism, and fertilityIodine is involved in the body’s production of thyroid hormones, and we humans need plenty of iodine throughout life, especially during periods such as fetal development and child development. Iodine is also important for brain development and cognitive skills. Severe iodine deficiency during pregnancy and during a child’s first years of life may result in stunted growth and/or mental retardation, but there has been uncertainty about how a minor iodine deficiency affects the child before and after birth. In a review article that is published in Nutrients, the authors look closer at iodine’s role in fertility and child growth. Apparently, iodine deficiencies are quite common, and we even need selenium and other nutrients to secure a well-functioning thyroid gland.

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Overview of vitamins, minerals, and essential fatty acids


Overview of vitamins, minerals, and essential fatty acids

Vitamins, minerals, omega-3 and omega-6 fatty acids, and Q10 are nutrients that we need in certain quantities in order to support vital body functions.
Nutritional supplements containing vitamins and minerals must be labeled in accordance with the reference values.

This overview serves as general information about the different vitamins, minerals, and essential fatty acids and how they work.

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the Vitamin and Mineral Guide

Sodium (Na)

An adult contains around 100 grams of sodium. The lion's share of our sodium works in synergy with potassium and chloride as electrically charged particles called ions. Sodium and chloride are mainly found in the tissue fluids outside the cells, while potassium is mainly found on the inside of the cells. This distribution is vital for the cells and their so-called electrolyte balance that controls cellular uptake of nutrients, waste product excretion, nerve impulses, and the maintenance of essential fluid balances. The kidneys regulate the sodium levels, and it is vital that they are in balance with the body's potassium levels. A major sodium source is table salt (sodium chloride). If we ingest too much sodium it may cause a potassium deficiency and subsequent health problems.

Functions and importance for

  • Maintenance of the electrolyte balance with potassium and chloride
  • The body's fluid and salt balance
  • Enhances the secretion of gastric juice

Deficiencies and poos utilisation may be caused by

Rarely seen, as the kidneys regulate the body's sodium excretion

  • Excessive sweating
  • Extreme diarrhea
  • Vomiting
  • Poor kidney function
  • Diuretics

Deficiency symptoms

Rarely seen, as the kidneys regulate the excretion

  • Indisposition and dizziness
  • Heat stroke

Fatigue and muscle weakness

  • Headache


Sea salt that also contains other minerals. Refined table salt. Chips, peanuts, bread, cheese, sausage, marinated and smoked foods, cornflakes, ketchup, licorice, and several other industrially processed foods often contain a lot of salt that is used as a flavour enhancer. Normally, the body's sodium requirement is covered by means of the diet without the need for extra salt.

Sodium content in mg per 100 grams

Table salt 38,850
Sea salt 33,800
Cheese and smoked salmon approx. 1,500
Chicken, cod 76
Apple, onion 3

Recommended daily allowance (RDA)

Adults: 11 years of age and older: 1,000-2,800 mg.
Children: 1-10 years of age: 500-1000 mg

Please note: Many people tend to overdose on sodium

Increased need

Rarely seen and only in connection with

  • Excessive sweating
  • Heat stroke

Overdosing - side effects

The Nordic Nutrient Recommendations (NNR) recommend that women keep their sodium intake below 6 grams daily and men keep their intake below 7 grams, which is the equivalent to 2.4 and 2.8 grams of sodium respectively. We generally consume far more sodium and far less potassium through our diets than we used to, and that may have adverse health implications.

  • Imbalance between potassium and sodium levels
  • Blood pressure increase in those who are sensitive

Different sodium compounds

Sodium is found in various salts with different biochemical effects.
Sodium chloride - table salt
Sodium ascorbate - salt of ascorbic acid. Used in e.g. non-acidic vitamin C supplements
Sodium bicarbonate/sodium hydrogen carbonate - soda and baking powder. Acidity regulator (also used against excessive stomach acid)
Sodium carbonate - soda. Acidity regulator, caustic
Sodium citrate - sodium salt of citric acid
Sodium sulfite - preservative

Important information

The large consumption of sodium is mainly a result of our food being refined, nutritionally depleted, and devoid of its natural flavours. Table salt (sodium chloride) lacks other minerals, and an anti-caking agent (typically aluminum powder) has been added. Sodium plays an essential role in the animal kingdom but plants can easily do without the mineral. For that reason pure vegetarian diets often lack sodium but contain a lot of potassium on the other hand.

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