The Essential Role of Potassium in Maintaining Health

Potassium is an essential mineral for the body, crucial for maintaining numerous physiological functions. It plays a vital role in the proper functioning of nerves, muscles, and the heart, and is integral in the transport of nutrients and waste products across cell membranes. Predominantly found within body cells, potassium is critical for muscle and nerve function and the metabolism of carbohydrates. It helps maintain fluid and electrolyte balance, ensuring cell integrity and proper physiological function.

Potassium deficiency, though rare, can occur, particularly in cases of prolonged diarrhea or other health conditions. Symptoms of potassium deficiency include elevated blood pressure, increased salt sensitivity, kidney stones, and heightened bone turnover. These symptoms highlight the importance of maintaining adequate potassium levels for overall health.

Dietary sources of potassium are plentiful, particularly in fruits and vegetables. Common potassium-rich foods include bananas, oranges, potatoes, spinach, and tomatoes. Additionally, legumes, fish, and dairy products also contribute significantly to dietary potassium intake. In the United States, top sources of potassium for adults include milk, coffee, tea, nonalcoholic beverages, and potatoes. For children, milk, fruit juice, potatoes, and fruit are primary sources.

Ensuring sufficient potassium intake is essential for maintaining health, particularly in preventing hypertension and supporting bone health. The Dietary Guidelines for Americans recommend consuming a balanced diet rich in potassium-containing foods to support overall well-being. By including a variety of fruits, vegetables, and other potassium-rich foods in daily meals, individuals can help ensure they meet their nutritional needs and support their body's vital functions.
The Essential Role of Potassium in Maintaining Health

Food sources of germanium

Germanium improves cellular oxygenation. This helps to fight pain, keep the immune system functioning properly and rid the body of toxins and poisons.

Germanium is found in all organic material, of both plant and animal origin. Tiny amounts of Germanium are found in many foods: broccoli, celery, garlic, shitake mushrooms, milk, chlorella, onions, pearl barley, rhubarb sauerkraut, tomato juice and the herbs aloe vera, comfrey, ginseng and suma.

Canned tuna may contain 3 ppm, and tomato juice and baked beans may contain 5 ppm.

Typically daily intake is 0.4 to 1.5 mg (5.5 to 20.7 μmol). In the United Kingdom daily intake is about 367 ug.

A Japanese scientist, Kazuhiko Asai, found that an intake of 100 to 300 milligrams of germanium per day improved much illness, including rheumatoid arthritis, food allergies, elevated cholesterol, candidiasis, chronic viral infections, cancer and AIDS.

Although it is rare, some individuals may develop kidney problems or have a toxic reaction to this mineral if they take it in excessive amounts.
Food sources of germanium

Biochemistry of zinc

Nutrition involves the relationship of food and nutrients to health. Biochemistry is the science of the chemistry of living organisms.

Zinc metalloenzymes catalyze approximately 50 important biochemical reactions. Many of these enzymes have been isolated from more than one species, resulting in identification of over 200 catalytically active zinc metalloproteins. Carbonic anhydrase, alcohol dehydrogenase, alkaline phosphatase and steroid hormone receptors are examples.

The functions of zinc in metalloenzymes are catalytic structural, regulatory and noncatalytics. Examples of enzymes in which zinc plays a catalytics role include carbonic ahnydrase, carboxypeptidas, thermolysin, and aldolases.

Excessive intake can cause adverse effects in humans and animals. In human, the effects of acute zinc toxicity are gastrointestinal disturbances giving rose to abdominal pain, nausea and vomiting. Chronic zinc toxicity is associated with changes in copper balance leading to symptoms of copper deficiency.

Zinc deficiency is an important part of protein-energy malnutrition and may limit weight gain during refeeding unless adequate amounts are provided.

The average daily dietary intake of zinc is around 150 umol. It is present in all protein rich foods.
Biochemistry of zinc

Symptoms due to toxicity of zinc

In humans, most of the body’s zinc is in the skeletal muscle (about 60%) and one third in the bone, skin, liver, brain, kidneys and the heart have small total amounts in this regard. Excessive intakes of zinc cause toxicity.

Zinc has low human toxicity by the oral route, but high levels can cause gastrointestinal distress. An acute zinc toxicity (such as from 4 g of zinc gluconate, which provides 570 mg of elemental zinc) produces some of the following symptoms: metallic taste, headache, weak heart beat, nausea, vomiting, epigastric pain, abdominal cramps and bloody diarrhea.

Tachycardia, hemolytic anemia, pancreatitis, renal damage and death have been reported on this occasion.

Long term oral intakes of zinc at levels of 18,5 to 25 mg/day can interfere with copper absorption and intakes 10 to 30 items the RDA can impair immune responses and decrease serum high density lipoprotein.

The most common sources of zinc poisoning in human are metal fumes, and illness arising the ingestion of acidic foods prepared in zinc galvanized containers. The inhalation of zinc phosphide or phosphine gas also results in acute toxicity.
Symptoms due to toxicity of zinc

Calcium and mechanism of muscle contraction

Calcium has a central role in muscle contractions and it is obtained from extracellular and intracellular sources.

An elevation of intracellular calcium concentrations to about 1 uM is an absolute requirement for smooth muscle contraction, and a reduction in smooth muscle calcium concentration is considered mechanism of smooth muscle relaxation.

Calcium sits at a critical location on the muscle fiber, facilitating the interaction of the muscle proteins myosin and actin.

Stimulation of muscle fibers by nerve impulses, hormones, or stretch in the fiber increases the amount of calcium in the muscle cells and causes the muscle to contract. Calcium binds to calmodulin, causing structural changes that allow calmodulin to bind and activate myosin light chain kinase.

In the presence of calcium and calmodulin, this kinase phosphorylates a light chain of myosin. This result in structural changes in the thick filament, which then allow its interaction with actin, actomyosin ATPase activity and smooth muscle contraction.

As the cells pump calcium ions back outside, the muscle relaxes.
Calcium and mechanism of muscle contraction

Food sources of manganese

Estimated average dietary manganese intakes in the United States range from 2.1 to 2.3 mg/d for men and 1.6 to 1.8 mg/d for women.

The best food sources of manganese are of plant origin. Tea, coffee, nuts, cereals and some fruits are the best food sources of manganese. Some estimates suggest that coffee or tea supplies as much as 20 to 30 percent of our daily manganese intake.

People eating vegetarian diets and Western diets emphasizing whole grains may have manganese intakes as high as 10.9 mg/d.

Fair sources of manganese are brewer’s yeast, liver, most fruits and vegetables, orange pekoe tea and white enriched bread.  Dairy products, meat fish and poultry are poor sources of manganese.
Food sources of manganese

What are ultra-trace minerals?

Minerals are inorganic substances that are widely distributed in nature. They are the constituent which remain as ash after the combustion of plant and animal tissues.

Some minerals occur in the body tissues in relatively large amounts (100 milligrams to gram quantities) and are designated as macro-minerals, whole others are represent in much smaller concentrations (milligrams or micrograms).

Minerals are divided into:
*main elements
*trace elements
*ultra-trace elements

The body contains minuscule amounts of ‘ultra-trace’ minerals and as the name implies, the ultra-trace minerals are found in extremely small amounts in foods and in the body. It may require less than 1 milligram per day of each one.

Ultra trace elements (arsenic, boron, silicon, nickel, and vanadium, bromine, cadmium, fluorine, lead, lithium, manganese, cobalt, molybdenum, nickel, rubidium, silver, antimony  and tin) are elements that have been theorized that these substances are essential for nutrition and deficiency of them contribute to a variety of diseases.
What are ultra-trace minerals?

Copper role in formation of collagen

All copper metalloenzymes involve molecular oxygen or oxygen species in their reactions.

Copper plays a key role in the biosynthesis of the extracellular matrix proteins, collagen and elastin, through its function as a cofactor for the enzyme lysyl oxidase.

Lysyl is a secreted enzyme and it catalyzes cross-linking of collagen, which is necessary for proper collagen formation and integrity of all connective tissue.

Copper ion is being located at its active site. Since lysyl oxidase is a copper-dependent enzyme, impaired cross-linking can occur as a result of copper deficiency.

Inhibition of lysyl oxidase has profound effects on the strength of bone and elastic tissue.

Thus, copper is essential for formation and maintenance connective tissue and skeletal mineralization.
Copper role in formation of collagen

Food sources of calcium

Early humans are thought to have consumed a diet rich in calcium from a wide range of plant sources.

Milk and dairy products are the richest food source of calcium.  In the last few years, an enormous increase in diversity of food sources of calcium has become available in North America through extensive fortification.

Milk and other dairy foods provided 84% of the calcium from foods in the United States in 1889-1993. Milk and milk products such as yoghurt and cheeses are outstanding sources of calcium.

Now, calcium requirements can be met through consumption: naturally occurring foods, calcium-fortified foods, and supplements.

There are also food plants contain plenty of calcium that is highly bioavailable: cauliflower, watercress, parsley, Brussels sprouts, rutabaga, kale, mustard greens, bok choy, broccoli and turnip greens.

Eventhough green leafy vegetables contain less calcium per serving than milk, but calcium in these vegetables is absorbed well or slightly better than calcium from milk.

Although slightly less bioavailable, calcium is also abundant in almonds, sesame seeds, pinto beans and sweet potatoes. Mineral waters are also often a good natural source of calcium.
Food sources of calcium

Nutritional value of cheese

The essence of cheese making is the coagulation of milk and its conversion from a colloidal dispersion into a gel known as curd, and the subsequent release of water in the form of whey.

The cheese-makers have to ensure that the cheese is an edible, acceptable, marketable and nutritious food. 

Nowadays, the consumer has become more away of food composition and the risks – real or imaginary – that may associated with excessive intakes of certain components in foods.

Cheese has a high nutritional value as would be expected from the fact that a pint or 568 mL of milk produces only about 56 g cheese.

Cheese made from whole milk is known to contain most of the essential fatty acids.

The daily protein requirement for adults is approximately 1g/kg, of body weight so that, for a person weighing 70 kg, the daily requirements would be about 70 g of protein.

All cheese is a good source of high quality proteins with sufficient amounts of all the essential amino acids. Casein is the main protein in cheese, it contains all the indispensible amino acids in approximately the proportions that the human body needs.

Cheese is rich source of calcium, phosphorus and vitamin A and also contains useful quantities of other nutrients.

All cheeses, except cottage cheese, are good sources of vitamin A. Orange and yellow cheeses are colored with carotenoid pigments, including bixin (the carotenoid pigment in anatto) and synthetic beta-carotene. 

Hard cheeses are an excellent source of calcium: softer cheeses are a good source; cream cheese and cottage cheese are poor source.

It is much more concentrated food than milk but it less complete because of its lack of carbohydrate.

45 g of cheddar cheese contains:
Energy                769 kJ
Protein               11.5 g
Carbohydrate     0.05 g
Fat                     15.5 g
Calcium              324 mg
Iron                    0.1 mg

50 g cottage cheese contains:
Energy                207 kJ
Protein                6.9 g
Carbohydrate     1.1 g
Fat                     2 g
Calcium              35 mg
Iron                    0.2 mg
Nutritional value of cheese

Minerals content in goat’s milk

Goat milk contains higher calcium, phosphorus, potassium, magnesium, and chlorine and lower sodium and sulfur contents than cow milk.

Although the fluctuation of macro-mineral contents may not be considerable in goat milk, their levels can vary, depending on the breed, diet, animal and stage of location.

Goat milk has a reputation of being a highly digestible dairy product even more digestible than cowls milk and less allergenic as well.

When compared with cow’s milk, goat’s milk has a lower iron. However, goat milk contains 13% more calcium, 134% more potassium, and 27% more selenium compared with cow’s milk. It is also four times higher in copper.

Goat milk contains about 134 mg Calcium and 121 mg Phosphorus / 100g. Human milk contains only one-fourth to one-sixth of these minerals.

Phosphorus exerts several important bioactive metabolic functions in the body, including bone mineralization, energy metabolism, fat and carbohydrate metabolism, body buffer system and formation and transport of nucleic acids and phospholipids across cell membranes for body cell functioning, etc.

Goat’s milk is one do the best fluorine sources, nearly ten times higher than cow’s milk. Dietary fluorine helps built immunity, protect teeth and strengthen bones.
Minerals content in goat’s milk

Boron in human body

Boron is found in a variety of foods. Beer, cider and wine make a respectable contribution of human boron intake. Boron appears in foods primarily as sodium borate and boric acid, two forms that seem to be readily absorbed.

The human requirement for boron is estimated to be between 0.3 and 1 milligram per day - an amount easily consumed though a normal diet.

Boron is found in many tissues; however, bone contains the most. Boron has been shown to replace iron in some of its functions, particularly in the healing of wounds.

Boron appears to either directly or indirectly affect the metabolism of calcium in bone and influence the composition and strength of bone.

In situations where the body receives an adequate supply of calcium but has deficient magnesium resources, boron seems to actively substitute for magnesium during the process of bone formation.

Boron needs are increased during a vitamin D deficiency.

Boron has the ability to reduce the urinary excretion of calcium and magnesium. It preserve calcium in the body, while decreasing urinary losses of calcium, through its actions on the kidneys.

Boron in human body

Minerals interaction with other food components

The behavior of minerals is often influenced by the presence of other food constituents.

Minerals are absorbed primarily in the small intestine and subsequently circulated to the liver in the blood. It has been shown that mineral absorption is decreased by fiber.

Phytates in fiber can form insoluble complexes with iron and zinc and may interfere with the absorption of calcium by causing formation of fiber-bound calcium in the intestines.

Phytate is not the only dietary component that influence mineral bioavailability. Other food components such as dietary fiber, polysaccharides, oxalates, and polyphenols, are also known to influence the bioavailability of minerals adversely. The negative effect of phytate and polyphenols on iron bioavailability is relatively strong. 

Vitamin D also play a vital role in calcium absorption and utilization. Consequently, severe maternal vitamin D deficiency interferes with normal calcium metabolism, resulting in rickets in the infants and osteomalacia in the mother.

Meat factor can increased the iron bioavailability. It has been suggested that amino acids or polypeptides that result from digestion are able to chelate nonheme iron.

While meat factor and vitamin C can enhance bioavailability of nonheme iron, other dietary components are inhibitory. For example, compound called chelators bind nonheme iron in intestines., making the iron unavailable for absorption.
Minerals interaction with other food components

Minerals content in cow’s milk

Milk is an important source of growth supporting minerals, such as potassium, magnesium, phosphorus and zinc.

These minerals are especially important during catch up growth after a period of weight loss.

Mineral in milk are mainly present as soluble salts or in colloidal form associated with caseins.

Milk contains about 30 different minerals, but only a few of them are present in greater than trace amounts.

The mineral and trace elements content of cow milks is not constant but is influenced by a number of factors, such as stage of lactation, nutritional status of the mother, and environmental and genetic factors.

The two most abundant are calcium and phosphorus.

Although milk is rich in calcium, it may not be the best way to obtain this mineral. The dosages appropriate for the needs of small calves not for human beings.

Calcium constitutes about 30 percent of the total minerals in milk. In turn, about 30 percent of the total calcium is soluble.

Cow milk contributes a little to dietary intakes of sodium, but some dairy products, such as chesses and butter contain added salt and can be significant sources of sodium in some countries.
Minerals content in cow’s milk

Food Minerals in General

Minerals are naturally occurring and it enter human body naturally as components of food and to a lesser extent, water.

Minerals that are needed in relatively large amounts are referred to as major or macrominerals. Others that are need in very small amounts are referred to as trace minerals or microminerals.

Macrominerals are:
Calcium
Phosphorus
Magnesium
Sodium
Chloride
Potassium
Sulfur
Iron

Other traces element or microminerals needed by human body:
Cobalt
Copper
Iodine
Manganese
Molybdenum
Fluoride
Selenium
Zinc
Chromium
Nickel, Silicon, Tin and Vanadium
Boron
Lead
Arsenic
Bromine
Germanium
Lithium
Rubidium


Mineral in the diet come from both plant and animal sources. Some minerals are present as functioning components of the plant or animals and are therefore present in consistent amounts.

Minerals are key players in many body processes and raw diets provide rich sources of these nutrients.

The bulk of the total mineral content of the human body is represented by the skeletal minerals.

Lesser amounts of minerals are constituents of essential molecules such as thyroxine and hemoglobin, or exist as free ions, or more frequently are loosely bound to proteins and other substance in the body tissues.

Activation of cellular enzyme systems, the critical pH of the body fluids necessary for the control of metabolic reactions, and the osmotic balance between the cells and its environment all largely depend on the mineral elements present in the cellular medium.

For some minerals, such as sodium, body absorb almost all that is present in the food, but for others absorption happened only for a small percentage.

Eating organic foods can supply increased amounts of certain minerals. Organic crops provide significantly more iron, magnesium, phosphorus, and vitamin C.

Scientists reported vegetables and fruits deliver extremely good value in terms of the nutrients (such as calcium, iron and magnesium) delivered.
Food Minerals in General

Major minerals in food

Minerals often are grouped as major minerals and trace minerals. Human need more than 100 mgs per day of each major minerals.

Food sources of minerals are just as diverse. Although often associate mineral with animal foods, such as meats and milk, plant foods are important sources as well.

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

Some of the major minerals constituents, especially monovalent species, are present in foods as soluble salts and mostly in ionized form.

This applies, for example, to the cations sodium and potassium and the anions chloride.

Metals are often present in the form of chelates. Chelates are metal complexes formed by coordinate covalent bonds between a ligand and a metal cation; the ligand in a chelates two or more coordinate covalent binds to the metals.

Example of chelate ring system is chlorophyll. Other example of food components that can be considered metal chelates are hemoglobin and myoglobin, vitamin B12, and calcium caseinate.

Neither can minerals be destroyed by heat, air, acid or mixing, In fact, the ash that remains when a food is burned contains all the minerals that were in the food originally. Mineral can be lost from food only when they leach into cooking water that is then poured down the drain.

Major minerals are include: calcium, phosphorus, magnesium, sodium, chloride, potassium and sulfur.
Major minerals in food

Beryllium in Human Nutrition

Food is not a significant source of beryllium.

In human metabolism, it appears that beryllium is only slightly (about 0.006% of that ingested), absorbed by the digestive tract and is excreted rapidly.

What is absorbed is carried in blood, apparently as a colloidal phosphate bound to protein, to the liver, where it is retained initially.

Some of this is subsequently deposited in bone where it behaves in a manner skin to magnesium.
Benefits of beryllium in human nutrition have not been determined. It functions is yet unknown.

Beryllium is related to magnesium, which is essential element of human nutrition, and it can mimic this and displace it from certain key enzymes which then malfunction.

Inhalation of this particles is by far the major hazard to humans from this metal. Beryllium has been incriminated in pulmonary ailments of workers exposed to beryllium dusts.

They suffer inflammation of the lungs a condition known as berylliosis, or chronic beryllium disease, which leaves them breathless.
Beryllium in Human Nutrition

Food as a Source of Minerals

Food as a Source of Minerals
It is known that human beings require 14 different elements for health and growth. These include calcium, phosphorus sodium, chlorine, potassium and magnesium and sulphur, which are present in appreciable amounts (0.5 percent or more ) the other iron, iodine, manganese copper, zinc, cobalt and fluorine are found in traces.

Functions of mineral
Minerals have several functions in the body. Body building minerals serve as structural constituents in the hard issues of the body, such as the bones and teeth.

They are the components of soft tissues (muscles, nervous tissue).

They form a part of compounds essential for body functions (hemoglobin, thyroxine, insulin etc.)

Body regulation
Some minerals help to maintain acid-bases balance and while others regulate water balance in the body. Some minerals are important in transmission of nerve impulses, while other are necessary for muscle connection and relaxation.

Essential for Active of Enzymes
Some metals are integral part of enzymes, while others function as cofactors of some enzymes.

Calcium and Phosphorus
The minerals are needed in comparatively large amounts to help normal growth and development of bones and teeth.

Breast milk supplies these in sufficient amounts for the six months of life. The best source of calcium is milk. Babies receive an excellent supply of calcium from their mother’s milk.

The milk of cows, buffaloes and goats is rich in calcium, so are milk products such as curd, paneer, khoa, cheese and milk powder. Other food sources are fish, sesame seeds, the miller ragi and dark green leafy vegetables.

Deficiency of calcium may lead to poor and teeth formation. Severe deficiency may cause rickets in children and osteomalacia in adults.

Iron
The iron requirement is met from the fetal store for the first three months. Iron is essential for the formation of hemoglobin, the red pigment in blood.

Iron is the one mineral, which is found in insufficient amounts in the infant’s diet when it is fed only milk.
Food as a Source of Minerals

Calcium Diets

Calcium Diets
Calcium is found in dairy foods, salmon (with bones), sardines, seafood and dark green leafy vegetables. Food sources include almonds, asparagus, blackstrap molasses, brewer’s yeast, broccoli, buttermilk, cabbage, carobs, cheese, collards, dandelion green, dulse, figs, filberts, goat’s milk, kale, kelp, milk, mustard greens, oats, prunes, sesame seeds, soybeans tofu, turnip greens, watercress, whey and yogurt.

Herbs that contains calcium include alfalfa, burdock root, cayenne, chamomile, chickweed, chicory, dandelion, eyebright, fennel seed, fenugreek, flaxseed, hops, horsetails, kelp, lemongrass, mullein, nettle, oat straw, paprika, parsley, peppermint, plantain, raspberry leaves, red clover, rose hips, shepherd’s purse, violet leaves, yarrow, and yellow dock.

A diet that is high in protein, fat and/or sugar affects calcium uptake. The average American diets of meats, refined grains, and softdrinks leads to increase excretion of calcium. Consuming alcoholic beverages, coffee, junk foods, excess salt, and/or white flour also leads to the loss of calcium by the body.

A diet based on foods such as vegetables, fruits and wholesome grains, which contain significant amounts of calcium but lower amounts of phosphorus, is preferable.

Oxalic acid (found in almonds, beet greens, cashews, chard, cocoa, soybeans and spinach) interferes with calcium absorption by binding with it in the intestines and producing insoluble salts that cannot be absorbed.

The normal consumption of foods containing oxalic acids should not pose a problem, but overindulgence in these foods inhibits the absorption of calcium. Oxalic acid can also combine with calcium to form calcium-oxalate kidney stones. However, that taking magnesium and potassium supplements can prevent the formation of this types of stone.
Calcium Diets

Calcium in Human Body

Calcium is vital for the formation of strong bones and teeth and for the maintenance of healthy gums. It is also important in the maintenance of a regular heartbeat and in the transmission of nerve impulses.

Calcium lowers cholesterol levels and helps prevent cardiovascular disease. It is needed for muscular growth and contraction, for the prevention of muscle cramps. It may increase the rate of bone growth and bone mineral density in children.

This important mineral is also essential in blood clotting and helps prevent cancer. It may lower blood pressure and prevent bone loss associated with osteoporosis as well. Calcium provides energy and participates in the protein structuring of RNA and DNA. It is also involved in the activation of several enzymes, including lipase, which breaks down fats for utilization by the body.

In addition, calcium maintains proper cell membrane permeability, aids in neuromuscular activity, helps to keep the skin healthy, and protects against the development of preeclampsia during pregnancy, the number one cause of maternal death. If high blood pressure develops due to pregnancy, it can be reduced by calcium intake.

Calcium protects the bones and teeth from lead by inhibiting absorption of this toxic metal. If there is a calcium deficiency, lead can be absorbed by the body and deposited in the teeth and bones.

Calcium deficiency can lead to the following problems: arching joints, brittle nails, eczema, elevated blood cholesterol, heart palpitation, hypertension (high blood pressure), insomnia, muscle cramps, nervousness, numbness in the arms and/or legs, a pasty complexion, rheumatoid arthritis, rickets and tooth decay.

Deficiencies of calcium are also associated with cognitive impairment convulsions, depression, delusions and hyperactivity.
Calcium in Human Body