The Mineral Composition of Milk: Nutritional Value and Diagnostic Insights

Milk contains approximately 30 different minerals, but only a handful exist in quantities beyond trace levels. The most abundant minerals are chloride, potassium, calcium, and phosphorus, which play crucial roles in the nutritional value and function of milk. What makes milk unique is that the mammary gland selectively concentrates these minerals, resulting in their higher levels in milk than in blood. This selective concentration is particularly notable for potassium, calcium, and phosphorus, elements essential for bodily functions such as bone health, nerve signaling, and muscle function.

Potassium stands out because its concentration in milk exceeds that of calcium, even though calcium is often more emphasized for its well-known benefits, such as supporting bone development in infants and young mammals. In fact, calcium accounts for about 30% of the total mineral content in milk. Potassium, on the other hand, plays a key role in maintaining fluid balance, nerve transmission, and proper heart function. The high concentration of these minerals in milk highlights the biological precision with which the mammary gland operates to ensure the nourishment of the offspring.

The detailed mineral composition of milk can also be a diagnostic tool. One important application is the detection of udder injuries or infections such as mastitis in dairy cows. In cases of mastitis, an inflammation of the mammary gland, the composition of milk changes, resembling that of blood more closely. This shift is marked by an increase in sodium and chloride levels, reflecting damage to the tissue barrier that normally regulates mineral transport. Elevated sodium and chloride levels in milk can signal inflammation or infection, helping veterinarians and farmers identify and treat affected cows more efficiently. Early detection and treatment of mastitis are crucial, as this condition not only affects milk quality but also poses health risks to the animal and may lead to decreased milk production. Thus, monitoring milk's mineral content serves both nutritional and health purposes in dairy management.
The Mineral Composition of Milk: Nutritional Value and Diagnostic Insights

Selenium in detoxification of toxic minerals

Antioxidant defense molecules are divided into two categories: enzymatic and nonenzymatic. In this context, selenium is an essential element with physiological nonenzymatic antioxidant properties.

Among the activities of the essential trace element selenium is the ability to reduce the toxicity of metal ions. Toxicity from metals is increasing due to the extensive release from industrial, agricultural, chemical, domestic, and technological sources, which in turn contaminate the water, soil, and air.

Selenium binds with many toxic minerals such as arsenic, cadmium, lead, and mercury and facilitates their excretion from the body.

Selenium is known to function as an antagonist to counteract the toxicity of metals. It has been suggested that like mercury, silver and cadmium also form a complex with selenium, and the resultant complex binds to plasma proteins in rats. Similarly, interaction with selenium was also reported for a number of metals such as copper, lead, platinum, tin, and thallium in experimental animals.

By detoxifying per oxidized fats, via its role in the enzyme glutathione and peroxidase, selenium inhibits their carcinogenicity (cancer promoting traits). Selenium also counteracts many of the toxic effects of smoking tobacco.

Detoxification often depends on the metabolic reduction of selenium to hydrogen selenide; the mechanism generally advanced to explain such selenium/metal interactions is that selenide combines with heavy metal ions to give a metal selenide which is metabolically inert.
Selenium in detoxification of toxic minerals

Major minerals important to human health

The main minerals that keep human health intact and prevent from getting ill with a wide range of diseases are: Calcium, Magnesium, Potassium and Iron. They all strengthen the natural defense shield of immune system. Moreover, they have tones of other benefits on the main organs and functions of human body.

Calcium is the most abundant mineral in the body. Around 99 percent of calcium is stored in bones and teeth, where it supports their structure and function. The remaining one percent is used to support metabolic functions. Calcium is important for helping muscles relax and contract; important in nerve functioning, blood clotting, blood pressure regulation, immune system health.

Magnesium is the sixth most abundant mineral in the body Magnesium helps manage muscle and nerve function, control blood glucose levels, regulate blood pressure, and make DNA, protein and bones. It works with calcium to assist in muscle contraction, blood clotting, and the regulation of blood pressure and lung function.

Potassium is the third most abundant mineral in the body and is an electrolyte that helps with proper nerve and muscle functions including the beating of the heart.

Iron helps make many proteins, including hemoglobin, a protein that carries oxygen to body tissues, and myoglobin, which brings oxygen to the muscles. Human body also uses iron for growth and development, and to make some connective tissue and hormones. Part of a molecule (hemoglobin) found in red blood cells that carries oxygen in the body and it needed for energy metabolism.

Major minerals important to human health

Vegetarians need more iron compared with non-vegetarians

Iron is a mineral that is naturally present in many foods, added to certain food products, and available as a dietary supplement. It is an essential mineral needed to help red blood cells supply oxygen to our muscles for energy.

Vegetarians need almost twice the daily recommended amount of iron compared with non-vegetarians. Iron from plant-based foods is not absorbed as well by human bodies as animal food sources.

Plant-based sources of iron include pulses and legumes (such as beans, peas, and lentils), dark green leafy vegetables (such as spinach, cabbage, and broccoli), tofu, nuts and seeds.

Much of the iron in meat is heme iron, which is more easily absorbed from food and used by your body. Plant foods contain only non-heme iron. Although some plant foods are good sources of iron, it is often attached to compounds that reduce its absorption. These compounds are called phytates and are found in whole grains and dried beans.

Vitamin C enhances iron absorption from such plant sources, so eating vitamin C- containing foods (grapefruit, oranges, tomatoes, broccoli, and strawberries) in combination with iron-rich vegetables, fruits, nuts, etc. is recommended.
Vegetarians need more iron compared with non-vegetarians

Vitamins and minerals in rye

Rye is a cereal grain with a strong, unique flavor and visual characteristics similar to that of wheat, but with more length & slimness; the color of the cereal varies from yellow-brown to green to gray.

Rye is considered a good source o B-vitamins thiamin, riboflavin, niacin, panthotenic acid, pyridoxine, and folate and an excellent source of alpha-tocopherol, the vitamin E isomer with the highest biological activity.

These micronutrients are mostly remove during milling of flour, as the vitamins are stored mainly in the aleurone layer of bran, while vitamin E isomers are found in the germ.

Rye seeds contain numerous important minerals such as Ca, Mg, P, K, and Fe. A great feature of rye is its 4 to 1 ratio magnesium to calcium content.
Vitamins and minerals in rye

Citrus juice with minerals and vitamins

Fruit and vegetable juices are very good sources of the essential nutrients. Orange and grapefruit contains nutrients, micronutrients, vitamins and a mineral profile that is low or free of sodium while being high in potassium.

Most citrus cultivars are free of lipids, contain high levels of vitamins C and contain folate acid, thiamin, and to a lesser extent vitamin B6, niacin and riboflavin.

Vitamin C is relatively stable in citrus product during processing and storage. In addition to vitamin C or ascorbic acid, citrus juices also contain vitamin B complex and provitamin A.

Orange is rich in vitamin C and potassium and low in sodium. Grapefruit juice contains a lower concentration of folate, thiamin and niacin than orange juice.

The juice of citrus fruit contains about 0.4% ash. The ash content of orange juice was generally the highest in immature fruit and gradually decreased as fruit maturity progressed.

Citrus juice with minerals and vitamins 

Minerals are essential constituents for enzymes

Enzymes are well-known as highly effective and efficient catalysts of a wide variety of processes characterized by high selectivity and activity. Additionally, enzymes may reduce the number of reaction steps and quantities of hazardous solvents needed and thus make a process more inexpensive and environmentally friendly. Many mineral elements are essential constituents of enzymes regulate a variety of physiologic processes.

Sulfur is used in building amino acids, proteins, vitamins, enzymes and chlorophyll. It gives flavor to many crops. Magnesium is at the core of chlorophyll and necessary for the function of enzymes, and to produce carbohydrates, sugars and fats.

Calcium activates enzymes, influences water movement, critical for cell communication. Glutathione peroxidase contains selenium that converts hydrogen peroxide to water. Iron also serves as a cofactor to enzymes in oxidation/reduction reactions (i.e., accepts or donates electrons). These reactions are vital to cells’ energy metabolism.

Iron is necessary for Catalase (cytosol), an enzyme (primarily in liver) that converts hydrogen peroxide to water. Manganese involved in enzyme activity for photosynthesis, respiration and nitrogen metabolism.

Zinc is a component in enzymes and a cofactor in plant growth hormones, facilitates carbohydrate metabolism, protein synthesis and stem growth. Zinc is a catalyst for about 100 enzymes.

Many enzymes and the B-vitamins become active only when a phosphate group is attached. Copper acts as a core to enzymes is used in systems that create carbohydrates and proteins.

Copper is a constituent of several enzymes. Copper-dependent enzymes transport iron and load it into hemoglobin, a protein that carries oxygen through the blood. Copper-dependent enzymes release energy from glucose; provide a natural defense against free radicals that damage the body.

Molybdenum used in enzymes that reduce nitrates to ammonia. Without it protein synthesis is blocked and growth ceases.

Several metalloenzymes which include glutathione peroxidase (Se), catalase (Fe), and superoxide dismutase (Cu, Zn, and Mn) are critical in protecting the internal cellular constituents from oxidative damage.

Only when these metals are delivered in the diet in sufficient amounts can the animal body synthesize these antioxidant enzymes. In contrast, deficiency of those elements causes oxidative stress and damage to biological molecules and membranes.
Minerals are essential constituents for enzymes

Minerals as pro-oxidant

Oxidation is initiated by the formation of carbon radicals as a result of chain cleavage. The carbon radicals add oxygen to form peroxy radicals. Pro-oxidants increase the formation of free radicals and enhance oxidative damage.

Various trace metals, especially copper and iron, act as pro-oxidants in fat. Thus in processing must be taken to eliminate contamination with these trace minerals.

Iron and copper are considered to be pro-oxidant minerals that might reduce both the shelf-life and the sensory characteristics of food such as hazelnuts, because they are involved in rancidity.

Therefore, varieties with are low in pro-oxidants components, rich in antioxidant components are preferred for processing, because they minimize post-harvest quality losses and packaging and refrigeration costs.

Pro-oxidant minerals are needed to be isolated from the lipid fraction by encapsulation. From the viewpoint of lipid oxidation, the essential minerals should have been left out of the formulation because they are powerful pro-oxidants and could as a consequence limit the product’s shelf life.
Minerals as pro-oxidant

Minerals in peanut

The peanut is the fourth largest oil-bearing crop in the world and the third major source of protein.

The peanut kernel is very nutritious, containing 38-60% fat, 24-36% protein, 10-23% carbohydrate, about 3% minerals as well as other bioactive components. Nuts (including peanuts) are considered valuable sources of minerals to the human diets.

Peanut is a fairly good source of some dietary minerals. It contains elements such as calcium, magnesium, potassium, sodium, iron and certain trace elements such as manganese copper, zinc and born in appreciable amounts.

Some of these ‘hard to find’ minerals such as copper and magnesium may protect against coronary heart disease.

Roasted peanuts contained more minerals than raw seeds, probably due to the loss of moisture during heat treatment.

Atomic absorption spectroscopy has been the primary means of measuring minerals in foods, including peanuts.
Minerals in peanut

Minerals content in papaya

Papaya is member of the Caricaceae family that includes 6 genera and 35 species. Papaya plants are usually short-lived, but can produce fruit for more than 20 years.

The edible portion of the ripe papaya fruit contains both macrominerals and microminerals.

The macrominerals include sodium, potassium, calcium, magnesium and phosphorus. The microminerals include iron, copper, zinc, manganese and selenium.

It has been established that the calcium from fruit and vegetables can be utilized much better by the body than calcium in organic form or milk products.

Papaya fruit can also contribute significant amount of minerals to the human diet, but the mineral composition of the fruit reflects the trace minerals content of soil and also varies with climate, maturity, cultivars, agricultural practices, etc.

Large variation exists in the mineral content of papayas among production regions. For example, Na appears highest in papayas from coastal orchards, and K and Mg tend to be grates in fruit grown on tropical islands with volcanic soils.

Papaya content Na varied according to water supply for the production area.
Minerals content in papaya

Phytic acid: chelator of divalent minerals

Phytic acid is a strong chelator of divalent minerals such as copper, calcium, magnesium, zinc and iron.

Phytic acid with its major six phosphate groups is the major form of phosphate in grains and legumes.

The accepted name of phytic acid is Myo-inositol 1,2,3,4,5,6 hexakis dihydrogen phosphate or Myo-Inositol hexakisphosphate and phytic salts are generally referred to as ‘phytates’.

Phytate is a plant compound that is found in grains such as wheat, can bind with calcium and interfere with its intestinal absorption. It is the storage form of phosphorus in plants and it represents 50-85% of total phosphorus. Phytate rapidly accumulates in the seeds during the ripening period.

When a phytic acid containing foods are consumed with foods rich in calcium and zinc, phytic acid forms cation-phytic acid complexes and prevents these nutrients from being absorbed.

The ability of phytic acid to chelate the minerals was recognized as a potential concern in animal and human mineral nutrition.
Phytic acid: chelator of divalent minerals

Nutritive Minerals

Minerals are the group of essential nutrients, needed to both regulate body processes and give the body structure. Minerals are inorganic elemental atoms or ions.

Nutritionists, medical specialist and even people around the world talking all the time about the essential minerals which are crucial for human health.

Besides vitamins, minerals are more than a mere source of energy and wellbeing; they are a pure and extremely valuable source of health.

The dietary requirement for a mineral is defined as a n intake level which meets a specified criteria for adequacy, thereby minimizing risk of nutrient deficit or excess.

The major minerals that keep human health intact and prevent from getting ill with a wide range of diseases are: calcium, magnesium, potassium and iron.

They all strengthen the natural defense shield of organism, namely immune system. Moreover, they have tones of other benefits on the main organs and functions of human body.

Magnesium also participate in the catalytic activity of enzymes, while calcium and phosphorus are among the minerals that make human bones hard.

Like vitamins, minerals help trigger or regulate, a myriad of processes that continually take place in the body, so they are essential to human life. For example, they regulate fluid balance, muscle contractions and nerve impulses.

Minerals are categorized as a major or trace minerals based on the amount needed in the diet and the amount of the mineral in the body.
Nutritive Minerals

Minerals requirement for cattle

The total mineral, or ash, content of the animal body represents a very small percentage of the total dry matter.

A number of inorganic elements are essential for normal growth and reproduction of animals.

Requirements for minerals are typically determined on metabolism or growth studies or from retention plus calculated absorption values.

Based on body composition of the bovine on ‘fat free’ basis, the composition was 72.9% water, 21.6 % protein and 5.3% ash. In addition, there is a very small amount of carbohydrate, which is found primarily in the liver muscle and blood.

Mineral requirements of beef cattle can be grouped into major and trace mineral categories. However, trace minerals are needed in much lower concentrations and are usually designated by parts per million units.

Approximately 90% of the calcium and 70% of the phosphorus, plus magnesium, sulfur, sodium and chlorine are utilized in the bone and in cartilaginous organic matrix.

Thus, major consideration should be given to them during diet formulation.

Reasonably large quantities of phosphorus, potassium and sulfur are involved in muscle and gland tissues; sodium, potassium and chlorine, plus other elements, are in solution in the body fluids which establish pH and are involved in secretions, osmotic pressure and the irritability of the nerves and contractility of the muscles.

Trace minerals are extremely important nutrients, even though they are required in small amounts. Inadequate trace minerals consumption has been shown to affect reproduction performance, disease resistance, growth and thriftiness. The trace minerals include cobalt, copper, iodine, iron, manganese, molybdenum, selenium, zinc, and perhaps chromium and fluorine.

The trace minerals are present in body tissues is very low concentrations and often serve as components of metalloenzymes and enzyme cofactors or as components of hormones of the endocrine system.

Excesses of certain minerals may depress feed intake and growth rate.
Minerals requirement for cattle

Food Sources of Minerals

Minerals in foods include a range of inorganic elements that are required by living organisms to support biochemical processes, including building bones and teeth, transmitting nerve signals, energy conversions from food and vitamin biosynthesis.

All foods from both plants and animals contain varying amounts of minerals. The mineral material may be present as inorganic or organic salts or may be combined with organic material, as the phosphorus is combined with phosphoproteins and metals are combined with enzymes.

Animals tissue contain minerals in the proportions that the animal needs, so animal derived foods are more reliable mineral sources.

Minerals from animals foods can be absorbed more easily than those from plants.

Plants foods can be excellent of several minerals but the mineral content of plants can vary dramatically depending on the minerals in the soil where the plants are found.

More than 60 elements may be present in foods.

It is customary to divide the minerals into two groups, the macro-minerals or essential minerals and the trace elements.

The macro minerals includes potassium, sodium, calcium, magnesium, chloride, sulfate, phosphate and bicarbonate. These minerals required at more than 100 mg/day by the adult.

Trace elements are all others and are usually present in amounts below 50 parts per million (ppm).

There is also a group of minerals called ultra trace minerals, including vanadium, tin, nickel, arsenic, and boron that are being investigated for possible biological function.

Some mineral elements have been documented to be toxic to the body and should, therefore, be avoided in the diet.

The levels of trace elements/minerals in foods very according to inherent, environmental and processing factors.
Food Sources of Minerals

Minerals in Apricots

Minerals in Apricots
Potassium and other minerals, such as calcium and iron are contained in apricots.

The trace minerals copper, manganese and zinc are also presence. Dried apricots may have even higher concentrations of minerals.

In all forms, apricots are high in iron and potassium, a mineral essential for proper nerve and muscle function that also helps maintain normal blood pressure and balance of body fluids.

The apricot is an excellent food remedy for anemia on account of its hog content of iron. The small but essential amount of copper in the fruit makes iron available to the body. According to the medical scientists, the production of hemoglobin could be increased in the body by liberal use of apricots.
Minerals in Apricots

Function of Mineral in Human Bodies

Function of Mineral in Human Bodies
In general, the function of minerals in the body can be divided into two categories, namely, building body tissue and regulating numerous processes.

Potassium, sulfur, phosphorus, iron and other minerals are structural components of soft tissue.

Sodium is principally found in extracellular fluid (bone is an exception), where it is the chief cation, and thus it is considered mainly as a primary determinant of body fluid osmolarity as well as the maintainer of body fluid pH.

Intracellular fluid contains much smaller amounts of sodium though these stores, and perhaps the sodium of the bone also serve in this capacity.

It is also important to mention that the energy for impulse transmission in the nerve and its action potential derive from the potential energy represented by the separathion of sodium and potassium across the cell wall.

On the other hand, calcium, together with phosphorus, magnesium and fluorine are components of bone and teeth. Deficiencies during the growing years cause growth to be stunted and bone tissue to be poor quality.

A continual intake of mineral is essential for the maintenance of skeletal tissue in good condition

Minerals are an integral part of many hormones, enzymes and other compounds that regulate physiological functions in the organism.

For example, iodine required to produce the hormone thyroxine, chromium is involved in the production of insulin and hemoglobin is an iron containing compound.

Thus, production of these substances in the organism depends on adequate intake of the involved minerals.

Minerals can also act as catalysts. Calcium is a catalysts in blood clotting. Some minerals are catalysts in the absorption of nutrients from the gastrointestinal tract, the metabolism of proteins, fat and carbohydrate and the utilization of nutrients by the cell.

Mineral dissolved in the body fluids are responsible for nerve impulses and the contraction of muscles, as swell as for water and acid base balance.

Minerals play an important role in maintaining respiration, heart rate and blood pressure within normal limits.

The deficiency of minerals in the diet may lead to severe chronic clinical signs of disease, frequently reversible after their supplementation on the diet or following total parenteral nutrition.

The influence of minerals on biochemical reactions in living systems also make it possible to use them intentionally in many food processes.
Function of Mineral in Human Bodies

Minerals in Fresh Juices

Minerals in Fresh Juices
Minerals found in foods are quite different from those found in supplemental mineral pills.

In foods, minerals are always combined with specific amino acids: sometimes with vitamins.

The process of bonding mineral to amino acid or mineral to vitamin is called “chelation.”

Chelated minerals are preferable to synthetic minerals because the body easily recognizes and uses minerals in chelated form.

This is why a diet rich in easy-to-assimilate organic minerals will ensure the body maintains all its important minerals in proper ratio.

The balanced, chelated minerals in fresh juices help keep the body’s energy level high; the nerves calm; and the muscles, heart, bones, teeth, bones and nails strong.

They also keep the blood clean and the blood pH (its relative alkalinity or acidity) balanced.

They do this by neutralizing acid and alkaline ash, waste products of human digestion and metabolism.

Potassium is responsible for the electrochemical balance of tissues of the heart and all other muscles.

Phosphorus is essential to the proper function of the brain and nerves.

Calcium maintains the acid/alkaline balance of the blood and strengthens bones.

Sulfur aids the functioning of the brain and nerves. It is a body cleanser.

Iodine fuels the thyroid gland, which controls the body’s metabolism.

Magnesium aids in muscle relaxation, protein synthesis, energy production, and is a natural laxative.

Manganese is necessary in the functions of the brain.

Germanium aids in the function of the immune system and bowels. Studies show it may help alleviate mood disorders.

Selenium works with vitamin E to delay oxidation of fatty acids.

Sodium, with potassium, calcium and magnesium, works to neutralize acids, maintain cell integrity, and keep tissues’ electromagnetic energy intact.
Minerals in Fresh Juices

Minerals in General

Minerals in General
Minerals are the constituents which remain as ash after the combustion of plant and animals tissues. Minerals are divided into:

• Main elements

• Trace elements

• Ultra trace elements

The main elements (Nam, K, Ca, Mg, Cl, P) are essential for human beings in amounts >50 mg/day. Sulfur also belongs to this group.

Trace elements (Fe, I, F, Zn, Se, Cu, Mn, Cr, Mo, Co, Ni) are essential in concentrations of <50 mg/day; their biochemical actions have been elucidated.

Ultra – trace element (Al, As, Ba, Bi, B, Br, Cd, Cs, Ge, Hg, Li, Pb, Rb, Sb, Si, Sm, Sn, Sr, TI, Ti, W) are elements whose essentially has been tested in animal experiments over several generations and deficiency symptoms have been found these extreme conditions.

For one of these elements, if it is possible to detect a biochemical function in a vital tissue or organ, the element is assigned to the trace elements.

Main and trace elements have very varied functions, e.g., as electrolytes, as enzymes constituents and a building materials, e.g., in bones and teeth.

The importance of minerals as food ingredients depends not only on their nutritional and physiological roles. They contribute to food flavor and activate or inhibit enzymes- catalyzed and other reactions and they affect the texture of food.
Minerals in General

Minerals in Fruits

Minerals in Fruits
Fresh fruits and vegetables contribute about 26% of the magnesium and 19% of the iron to the U.S diet.

The following fruits are important contributors to the supply of indicated minerals in the U.S diet:

Potassium: banana, peach, orange, apple, dried fruits such as apricot and prune.

Phosphorus: banana, orange, peach, fig, raisin

Calcium: tangerine, grapefruit, orange

Iron: strawberry, banana, apple, orange
Minerals in Fruits

Microminerals in General

Microminerals in General
A precise definition for the essential microminerals (or trace minerals) has not been established. Some define essential microminerals as one that comprises less than one hundredth of one percent of total body weight. Others define it as a nutrient the body needs in concentrations of one part per million or less. These minerals initially gained the nomenclature of trace because their concentrations in tissue were not easily quantified by early analytical method.

Iron appears to be mineral that divides the macrominerals from microminerals; consequently, some define an essential trace mineral as one that is needed by the body in a concentration equal to or lower than iron.

Although fourteen microminerals are designated as essential, questions currently exist about essential of three of trace minerals, i.e., chromium, fluorine and vanadium. Their essentiality is questioned because they fail to meet all the proposed criteria for an essential trace mineral:

• It is present in all healthy tissue of living things.
• Its concentration from one animal to the next is fairly constant.
• Its withdrawal from the body induces reproducibly the same physiological and structural abnormalities, regardless of species studied.
• The abnormalities induced by deficiencies are always accompanied by specific biochemical changes.
• These biochemical changes can be prevented or cured when the deficiency is prevented or cured.
  

Microminerals in General