Minerals are fundamental building blocks for a healthy body and are necessary for a wide range of biological processes, including bone health, energy production, nerve function, immune defense, and hormone regulation. Major minerals such as calcium, magnesium, and potassium are required in larger amounts to maintain basic physiological functions, while trace minerals such as iron, zinc, and chloride, although only needed in small amounts, play an equally crucial role in human health and well-being. Modern agricultural methods, food processing, and lifestyle habits have reduced the mineral content of our diet, and research suggests that up to 92% of the population may have insufficient levels of essential minerals. This underscores the need for increased focus on mineral intake through a balanced diet and, when necessary, supplementation. This article provides an in-depth review of both major minerals and trace minerals, their specific functions, natural sources, the consequences of deficiency, and practical strategies to ensure a healthy mineral balance.
Why is mineral deficiency so widespread?
Mineral deficiency has become a significant global health issue, and several factors contribute to this. One primary cause is soil degradation. Modern agricultural practices such as monoculture, intensive cultivation, and the use of synthetic fertilizers have depleted the soil of essential minerals over time. Plants absorb minerals such as magnesium, zinc, and iron directly from the soil, but when the soil is depleted, this is reflected in lower mineral content in crops. A study published in the Journal of the American College of Nutrition found that the mineral content of 43 common vegetables and fruits has declined by up to 38% since the 1950s, partly due to soil depletion and a focus on high-yield crops rather than nutritional value. This means that even a plant-rich diet may be deficient if the soil they are grown in is nutrient-poor.
Another significant factor is food processing. Processed foods undergo procedures such as refining, heat treatment, and preservation, which often remove the mineral-rich parts of the raw ingredients. For example, grains lose up to 80% of their magnesium and zinc content when they are refined into white flour, according to research in The Proceedings of the Nutrition Society. This means that even though modern diets may be high in calories, they are often low in essential minerals such as calcium, potassium, and iron, contributing to widespread deficiency.
Water filtration is a third, often overlooked cause of mineral deficiency. Modern filtration systems such as reverse osmosis and carbon filters remove not only harmful substances such as lead and chlorine, but also beneficial minerals such as calcium, magnesium, and chloride. In areas where people mainly drink filtered water, this can significantly reduce total mineral intake over time, especially if the water is not remineralized after filtration.
Poor diet further exacerbates the problem. The typical Western diet is dominated by highly processed foods such as white bread, sugary drinks, and ready-made meals, and often contains little in the way of mineral-rich foods such as fruits, vegetables, nuts, and whole grains. Data from the National Health and Nutrition Examination Survey (NHANES) show that many people do not reach the recommended intake for minerals such as magnesium (50% deficiency in the USA), potassium (90% deficiency), and calcium (70% deficiency), reflecting a trend toward quick, nutrient-poor meals rather than balanced, whole foods.
Finally, certain groups have an increased need for minerals, which raises the risk of deficiency. Pregnant women require more iron and iodine to support fetal growth and development, as shown in guidelines from the Institute of Medicine. Athletes lose minerals such as magnesium, chloride, and zinc through sweat during intense training, which increases their needs. Older individuals may have reduced absorption capacity due to age-related changes in the gastrointestinal system, while people with chronic conditions such as celiac disease or inflammatory bowel disease may have impaired uptake of minerals such as iron and magnesium. These combined factors explain why mineral deficiency is so widespread and why awareness of mineral intake is crucial for maintaining health.
Major minerals and their functions
Major minerals are required in larger amounts, typically over 100 mg daily, and are fundamental to the body's basic functions. Here is a detailed overview of the most important major minerals and their roles:
Calcium is best known for supporting bone and dental health, where it forms hydroxyapatite, the mineral that gives the skeleton strength and structure. Beyond this, calcium is essential for muscle contractions, nerve impulse transmission, and blood coagulation. When a nerve impulse triggers calcium release in muscle cells, it enables contraction, while calcium also helps activate coagulation factors in the blood during injury. Calcium deficiency can lead to osteoporosis, muscle cramps, tingling in the fingers, and an increased risk of fractures, especially in older adults. Natural sources include dairy products such as milk, yogurt, and cheese, green leafy vegetables such as kale and broccoli, as well as fortified foods such as plant milk and orange juice. The recommended daily intake for adults is 1000–1200 mg, depending on age and sex.
Potassium regulates fluid balance inside and outside the cells, which is crucial for blood pressure control and heart function. As an electrolyte, it balances sodium and supports nerve impulses and muscle contractions, including the heart's rhythm. Research from Nutrients shows that a high potassium intake may help lower blood pressure by counteracting the effects of sodium, thereby reducing the risk of cardiovascular disease. Deficiency can cause muscle weakness, irregular heartbeat, fatigue, and in severe cases cardiac arrhythmias. Good sources include bananas, oranges, potatoes, spinach, avocado, and beans, with a recommended intake of 2600–3400 mg daily for adults.
Sodium works in tandem with potassium to maintain fluid balance and is essential for nerve function and muscle contractions. It is found in high amounts in table salt and processed foods such as canned goods and snacks, but excessive intake can lead to hypertension and increased strain on the heart. Deficiency is rare in Western diets, but can occur with extreme sweating, dehydration, or diarrhea, with symptoms such as headache, nausea, and confusion. Natural sources include seafood, celery, and beets, but most people get sufficient sodium from the salt in their diet. The recommended intake is up to 2300 mg daily, but many exceed this.
Magnesium is involved in over 300 enzymatic reactions, including energy production through ATP synthesis, muscle function, and nerve transmission. It helps muscles relax after contraction, which is important for preventing cramps and promoting relaxation, and it also supports mental processes by regulating neurotransmitters. Magnesium deficiency can lead to fatigue, muscle spasms, cardiac arrhythmias, and increased sensitivity to stress, and it is estimated that up to 50% of the population in the USA does not get enough. Sources include almonds, pumpkin seeds, whole grains such as oats, spinach, and dark chocolate, with a recommended intake of 310–420 mg daily.
Phosphorus is a key component of bones and teeth together with calcium and is crucial for energy metabolism by forming ATP, the body's energy currency. It also supports DNA and RNA synthesis and cell membrane function through phospholipids. Deficiency is rare in a normal diet, but can cause weak bones, fatigue, and muscle weakness if it occurs. Phosphorus is found in protein-rich foods such as meat, fish, eggs, and dairy products, as well as in legumes and nuts, with a recommended intake of 700 mg daily for adults.
Sulfur is an important part of the amino acids cysteine and methionine, which are used to build proteins and enzymes. It supports detoxification processes in the liver by contributing to the production of glutathione, a powerful antioxidant, and helps maintain skin, hair, and nail health through keratin structures. Deficiency is rare, as sulfur is found in many foods such as eggs, meat, fish, garlic, onions, and cruciferous vegetables such as broccoli, but low levels can affect the liver's detoxification capacity. There is no specific recommendation for sulfur, as the need is covered through protein intake.
Trace minerals and their functions
Trace minerals are required in very small amounts, often less than 100 mg daily, but their contribution to health is significant. Here is a detailed overview of the most important trace minerals:
Iron is essential for hemoglobin formation in red blood cells, which transport oxygen from the lungs to the body's tissues, and for myoglobin, which stores oxygen in the muscles. It also supports energy production in the mitochondria and the immune system by promoting white blood cell activity. Iron deficiency is the most common mineral deficiency globally and can lead to anemia, with symptoms such as fatigue, pale skin, dizziness, and shortness of breath. Heme iron from animal sources such as liver, red meat, and poultry is absorbed better (15–35%) than non-heme iron from plants such as lentils, spinach, and fortified grain products (2–20%), and vitamin C can improve absorption. The recommended intake is 8 mg for men and 18 mg for women of childbearing age.
Zinc contributes to the normal function of the immune system by supporting the production of T-cells, and it is essential for DNA synthesis, wound healing, and cell growth. It also affects the senses of taste and smell and is important for cognitive development in children. Zinc deficiency can lead to reduced immunity, hair loss, slow wound healing, diarrhea, and growth retardation in children. Good sources include oysters (one of the richest sources), red meat, poultry, nuts, seeds, and whole grains, but phytates in plants can inhibit absorption. The recommended intake is 11 mg for men and 8 mg for women.
Copper plays a role in energy production, iron metabolism, and the formation of connective tissue such as collagen and elastin, which provide strength to the skin, blood vessels, and bones. It is also important for the development and function of the nervous system by supporting myelin production. Deficiency can lead to anemia, neurological problems such as numbness, and weak bones. Copper is found in shellfish, nuts, seeds, whole grains, and dark chocolate, but excessive intake can disrupt zinc balance. The recommended intake is 900 µg daily.
Selenium is a powerful antioxidant that protects cells against oxidative damage through the enzyme glutathione peroxidase and supports thyroid function by helping convert T4 to T3. It also contributes to DNA synthesis and immune defense. Deficiency can cause muscle weakness, fatigue, and reduced immunity, while excess can cause selenosis (hair loss, nail problems). Selenium is found in Brazil nuts (one nut may cover the daily requirement), fish, poultry, eggs, and grains, but the content varies depending on soil selenium levels. The recommended intake is 55 µg daily.
Iodine is essential for the production of thyroid hormones (T3 and T4), which regulate metabolism, energy levels, growth, and development. Iodine deficiency can lead to goiter, fatigue, weight gain, and cognitive impairment, especially in children where it can cause developmental delays. Good sources include iodized salt, seafood such as seaweed and cod, and dairy products, with a recommended intake of 150 µg daily for adults.
Manganese supports bone health, blood coagulation, and the metabolism of carbohydrates, proteins, and fats by functioning as a cofactor for enzymes such as superoxide dismutase, which reduces oxidative stress. Deficiency is rare, but it can cause skeletal abnormalities, impaired glucose tolerance, and neurological symptoms. Sources include whole grains, nuts, legumes, and tea, with a recommended intake of 1.8–2.3 mg daily.
Chloride is an electrolyte that works with sodium and potassium to maintain fluid balance in the body and supports digestion by forming hydrochloric acid in the stomach, which breaks down food. It also contributes to nerve impulses and muscle contractions. Deficiency is rare, but can occur with extreme sweating or vomiting, with symptoms such as muscle weakness and dehydration. Chloride is found in salt (sodium chloride), seafood, and certain vegetables such as celery, with a recommended intake of 1800–2300 mg daily.
Chromium improves insulin function and helps regulate blood sugar levels, which supports a healthy metabolism and may help maintain stable energy levels. Deficiency can lead to impaired glucose tolerance and an increased risk of insulin resistance, although this is uncommon in a balanced diet. Sources include meat, whole grains, broccoli, and nuts, with a recommended intake of 25–35 µg daily.
Molybdenum is a cofactor for enzymes that break down harmful substances such as sulfites and purines in the body, and supports detoxification processes. Deficiency is extremely rare, but may affect liver function. It is found in legumes, grains, and nuts, with a recommended intake of 45 µg daily.
Boron helps the body use calcium and magnesium efficiently, supports bone health, and may positively influence hormone balance (such as estrogen and testosterone) and cognitive function. Deficiency is not well defined, but boron is found in fruits such as apples, nuts, and vegetables such as avocado, without a specific recommendation since the requirement is low.
Benefits and effects of minerals
Minerals provide a range of benefits that are crucial for the body's functions:
Bone health: Calcium, phosphorus, magnesium, manganese, and boron contribute to strong bones and teeth by forming mineral structures and supporting remineralization. Calcium and phosphorus form hydroxyapatite, while magnesium and manganese help maintain bone density, which is especially important for preventing osteoporosis in older adults.
Energy metabolism: Magnesium, iron, and copper are central to energy production. Magnesium activates ATP, the body's energy currency, iron supports oxygen transport to the mitochondria for cellular respiration, and copper helps with electron transport in the respiratory chain. This ensures that cells receive sufficient energy for daily activities, physical work, and recovery after exercise.
Immune system: Zinc and selenium strengthen the body's natural defense system. Zinc promotes the production and function of white blood cells that fight infections, while selenium protects immune cells from oxidative damage, which may increase resilience against bacteria and viruses.
Antioxidant protection: Selenium and sulfur (via glutathione) function as antioxidants, neutralizing free radicals that can damage cells, DNA, and tissues. This helps maintain healthy cellular function, reduce inflammation, and support long-term health.
Nerve and muscle function: Calcium, potassium, sodium, magnesium, and chloride are essential for signal transmission in the nervous system and muscle control. Calcium triggers muscle contractions, magnesium helps muscles relax, and potassium, sodium, and chloride balance electrical impulses in nerve cells and muscle fibers, enabling coordinated movement and heart function.
Thyroid function: Iodine is indispensable for the production of thyroid hormones that regulate the body's metabolism, temperature, and energy levels. Selenium also supports the thyroid gland by protecting it from oxidative stress and helping convert T4 into the more active T3 hormone.
The interplay of minerals is also critical. For example, magnesium improves calcium absorption, while iron and copper work together to support blood production. Zinc and copper compete for absorption, which underscores the need for balance. This synergy shows why a varied diet is important for maximizing the effects of minerals.
How to ensure sufficient intake?
To ensure a healthy mineral balance and avoid deficiency, the following strategies can be used:
Varied diet: A diet that includes fruits such as apples, berries, and oranges, vegetables such as spinach, broccoli, and sweet potatoes, whole grains such as quinoa, brown rice, and oats, nuts such as almonds and walnuts, seeds such as pumpkin seeds and sesame seeds, seafood such as salmon, oysters, and cod, and lean meats such as chicken and beef provides a broad range of major and trace minerals. Variety ensures that all mineral needs are covered, as different foods have unique mineral profiles. For example, seafood provides both iodine and selenium, while nuts are rich in magnesium and manganese.
Limit processed foods: Reduce your intake of refined products such as white bread, sugary drinks, chips, and ready-made meals, which often lack minerals and contain compounds such as phytates (in grains) and oxalates (in spinach), which can inhibit the absorption of zinc and iron. Instead, choose whole, unprocessed alternatives such as whole-grain bread, fresh vegetables, and homemade meals to maximize nutritional value.
Mineral-rich water: If you use filtered water, consider adding mineral drops (containing chloride, magnesium, and potassium) or choosing spring water that naturally contains minerals. This can compensate for losses from filtration systems such as reverse osmosis, which removes up to 95% of the minerals in water, according to studies from Water Research.
Supplements when needed: For at-risk groups such as pregnant women (increased need for iron and iodine), athletes (loss of magnesium and chloride through sweat), or older adults (reduced absorption), supplements may be useful if deficiencies are identified through blood tests or symptoms such as fatigue, muscle cramps, or reduced immunity. For example, iron supplements can treat anemia, but excessive intake can cause toxicity such as nausea and liver damage. Magnesium supplements may help with cramps and stress. Such measures should always be taken in consultation with a doctor.
Regular follow-up: Monitor mineral status through doctor visits, especially if you experience symptoms such as persistent fatigue, muscle weakness, hair loss, or reduced immunity. Blood tests can measure levels of iron (ferritin), zinc, magnesium, and other minerals, and provide a basis for targeted measures such as dietary changes or supplements.
Absorption factors should also be considered. Vitamin C in citrus fruits increases iron absorption from plants, while calcium-rich foods such as milk can inhibit iron absorption if eaten at the same time. Phytates in grains and legumes can reduce zinc and iron absorption, but soaking, sprouting, or fermentation (such as sourdough bread) can significantly improve bioavailability. Iodine absorption can be affected by goitrogens in raw cruciferous vegetables such as cabbage, but cooking neutralizes this. Being aware of such interactions can help you maximize mineral intake.
Disclaimer and reservations
The information in this article is intended for educational purposes and should not replace professional medical advice, diagnosis, or treatment. The use of mineral supplements or changes in diet should take place in consultation with qualified healthcare professionals. The effects of mineral intake may vary from person to person, and Uno Vita AS does not claim that minerals or related products can cure disease. All use is at your own risk, and we recommend that you consult a physician before starting new measures, especially if you have underlying health conditions. The products should be kept out of reach of children.
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Uno Vita reserves the right to share publicly available research and information about health and wellness technologies, including minerals, in accordance with national and international laws on freedom of expression and belief. This includes:
- The United Nations Universal Declaration of Human Rights (1948), Article 19: The right to freedom of opinion and expression, including the freedom to receive and impart information regardless of frontiers.
- The International Covenant on Civil and Political Rights (1966), Article 19: Emphasizes the right to seek, receive, and impart information and ideas through various media.
- Section 100 of the Norwegian Constitution: Ensures freedom of expression, with certain limitations out of consideration for the protection of children, privacy, and public order.
- The First Amendment of the United States Constitution: Protects freedom of expression against government interference and provides a strong legal basis for the free dissemination of information.
Uno Vita supports the right to share knowledge about the role of minerals in health within these principles.
References
- "Changes in USDA food composition data for 43 garden crops, 1950 to 1999" – Journal of the American College of Nutrition.
- "Why whole grains are protective: biological mechanisms" – Proceedings of the Nutrition Society.
- "Trace elements" – National Research Council (US) Committee on Diet and Health, Diet and Health: Implications for Reducing Chronic Disease Risk.
- "Minerals" – U.S. National Library of Medicine, MedlinePlus.
- "Scientific Opinion on Dietary Reference Values for nutrients" – European Food Safety Authority (EFSA).
- "Effects of micronutrient supplementation on human health" – Cochrane Library.
- "Essential minerals and their role in health" – Mayo Clinic.
- "Micronutrients and Health" – Harvard T.H. Chan School of Public Health.
- "Nutrient requirements and recommended dietary allowances" – World Health Organization.
- "Minerals and their role in metabolism" – Journal of Nutrition.
- "Trace minerals in nutrition and human health" – The American Journal of Clinical Nutrition.
- "Food sources of essential trace minerals" – U.S. Department of Agriculture.
