Vitamins are micro-nutrients. They were discovered by Eijkman (1897) in Indonesia, Java, while studying a disease called beriberi common among natives whose main diet was rice. He noticed that fowl fed on polished rice, developed beri beri, but not when fed on crudely milled rice.

In 1911 Funk obtained an alcoholic extract of the outer husk of rice which cured beri beri. This was thought to be a vital amine introducing the name vitamine. The “e” was later dropped to read “vitamin”.

Vitamins Functions And Sources:

As micro nutrients, vitamins are required in small quantities. Generally your body cannot manufacture or synthesize vitamins from scratch. So you need to get them from the food you eat or from supplement pills. Though, vitamins can be synthesized by some bacteria, yeast, mould, algae and some plant species. Some vitamins like vitamin B5 have been found to be synthesized by bacteria in the human large intestines. However it is not clear if the vitamins are available for absorption and use by the body.

Vitamins are required by the body for a variety of biological processes. These include growth e.g Vitamin B6; mental alertness e.g Choline, Niacin; resistance to infection e.g. Vitamin C and Vitamin E. They also act as catalysts in the body chemistry as well as precursors to vital body factors. This enables the body to use carbohydrates, fats and proteins.

Vitamins in themselves do not have calories and therefore do not give energy to the body. Natural vitamins are found in living things that is plants and animals and are organic food substances. There are many artificially synthesized vitamins.

Vitamins exist in varying quantities in an array of food sources from yeasts, wheat bran, cooked egg that provides Biotin, citrus fruits and milk that provide Vitamin C, green leafy vegetables and legumes that supply Folic acid .

Vitamin Classification:

There are mainly two types of vitamins classified based on their solubility. These are water soluble and fat soluble vitamins.

i) Water soluble vitamins include : Vitamin C also called citric acid, Vitamin B1 (thiamine), Vitamin B2 (Riboflavin), Vitamin B3 (niacin), Vitamin B5 (pantothenic acid), Vitamin B9 (folic acid), Vitamin B6 (pyridoxine), Vitamin B12 (cobalamin), Cholin, Biotin.

Water soluble vitamins are not stored in the body in any appreciable amounts. The surplus is washed out mainly through urine. They requires consistent replenishing using the diet we consume. This makes them safe because they do not collect in the body toxic levels, making large doses of vitamin supplementary safe. But caution should still be practiced because mega doses have side effects and even can be fatal.

For example, there is a low risk of vitamin toxicity from nicotinic acid with mega doses. Nicotinic acid a derivative of vitamin niacin, one may experience flushing, itching, nausea and vomiting, liver cell damage. So supplement with daily value doses. Do not use megadoses unless under ongoing expert advice.

ii)Fat soluble vitamins includes: Vitamin A, Vitamin D, Vitamin E and Vitamin K. Being fat soluble these vitamins are stored in the fat in our bodies. They can easily accumulate to toxic levels so if you choose to supplement be cautious.

Vitamin Deficiency:

The lack of these food factors i.e vitamins results to deficiency diseases. Vitamin defiency diseases are a manifestation of malfunctioning bio-chemical processes due to lack of the vital vitamins. Since the same vitamin may be used in a number of processes, deficiency in some vitamins can be quite serious and even fatal. For example over two hundred enzymes require the niacin vitamin coenzyme. So a lack of niacin makes this two hundred enzymes malfunction.

Vitamin deficiencies have been associated with long term latent deficiency diseases. These diseases occur after a long time of deficiency of some nutritional factors like vitamins. Long term latent deficiency diseases can be as severe as cancer, diabetes and heart disease. In our society today, these diseases are becoming the highest health concern.

The situation is grave because they are not only preventable but also cheaply preventable. A proper nutrition is all it takes to get all required nutrients including sufficient quantities of vitamins. General health benefits of vitamins include protection from a variety of diseases and conditions.

In case of a nutritional gap between what your body and what your diet provides, supplementing is necessary.

Whole foods are and will always be the best source of vitamins. This is because whole foods provide a combination of nutrients to the body including minerals and phytonutrients.

But many people do not receive all nutrients they need from their food choices. Either because they cannot or will not eat enough, or they cannot or will not eat right foods. This may be because of medical or physical conditions, your lifestyles, i.e. job, time, availability or even due to poverty. In such cases, supplementation is necessary.

Vitamin Supplementing:

Today’s lifestyles make it more necessary to supplement our diets. There are groups of people to whom supplementing may really not be a choice.

This will include you if;

i) You are sixty five years and older:- At this age some vitamins are not easily absorbed by your body system. Multivitamins may improve your immunity and lower risk of some infections.

ii) You are a post menopausal woman:- Supplement with calcium and vitamin D to help against osteoporosis.

iii) You do not eat the recommended five servings of fruit and vegetables a day.

iv) You are on a low calorie diet. E.g. You are trying to lose weight

v) You smoke The tobacco interferes and diminishes vitamin uptake of vitamins like vitamin B6, vitamin C, folic acid and even niacin.
Ps: This will not make up for the health risk of smoking.

vi) You drink excessively that is more than a bottle a day. Long term excessive drinking will reduce absorption of vitamins. Vitamins affected are thiamin (Vitamin B), Folic acid, Vitamin A & D, as well as Vitamin B12.

vii) You are pregnant or trying to be pregnant.

There is a wide choice of vitamin supplements in the markets to choose from. When choosing vitamins, consider the following:

a) Bioavailability of the vitamin: Choose vitamins supplements whose source of ingredients is from the human food chain. Many vitamins are extracted from “natural sources”, like algae, which we do not normally eat. This may not be easily available to your body.

b) Wide spectrum of vitamins: Prefer to use multivitamins that give a number of positively interacting vitamins. Remember we require all nutrients in varying quantities. It is better to have a multivitamin providing daily values instead of megadoses of a single or few vitamins.

c) Expiry date of the vitamin: Vitamins do expire. Buy to use only for the month. When you need more you can always purchase again.

d) Store Vitamins safely: Store in a cool dry place away from sunlight and children

e) Health concern: If you have a health condition e.g diabetes or having medication, please first consult your physician.

Also note, if you are in a weight loss program you need to consider your vitamin intake and find out if you your meal plans have any deficiencies. If there are, supplement.

Introduction

One of the fat-soluble vitamins, vitamin D constitutes two major forms which are vitamin D2 or ergocalciferol and vitamin D3 or cholecalciferol. Vitamin D2 is synthesised by plants whilst vitamin D3 is synthesised by the body. Vitamin D is naturally present in a number of food sources and dietary supplements, and is also manufactured with the aid of sun exposure. It is produced within the body when ultraviolet-B or UVB rays from sunlight reaches the skin. The liver and the kidney eventually help to convert vitamin D to an active hormone form.

Functions of Vitamin D

Vitamin D plays several key roles in the maintenance of organ systems. For example:

* Vitamin D helps regulate calcium concentrations in the blood. Since it works more like a hormone, its active form, calcitriol acts with the parathyroid hormone or PTH. If the calcium level is low, this would trigger the secretion of PTH, which would stimulate the conversion of vitamin D to calcitriol. Calcitriol would then act to increase calcium absorption in the intestines, calcium resorption in the kidneys and stimulate calcium release from the bones.

* Vitamin D helps maintain blood phosphorus levels. Low levels of vitamin D can result to an overactive parathyroid gland. Also with inadequate phosphorus in the body, bones cannot undergo normal mineralisation.

* It is also said that vitamin D benefits the immune system since the T-cells or immune cells have receptors for vitamin D. It acts by boosting phagocytosis, the bodily functions to combat tumours, modulate neuromuscular and immune functions and reduce inflammation.

* Vitamin D is also responsible for maintaining normal cell growth and function. It may be an important element to the prevention and treatment of cancer. It has also been suggested that vitamin D plays a role in regulating the growth and function of brain cells.

* Research studies suggest that vitamin D, because of its anti-inflammatory effect, plays a role in providing protection against osteoporosis, hypertension, cancer, type 1 diabetes, psoriasis and numerous autoimmune diseases.

Deficiency Conditions

There may be certain underlying causes of vitamin D deficiency. It can result from:

* Inadequate vitamin D intake together with inadequate sun exposure

* Certain disorders that compromise vitamin D absorption

* Conditions that can impair the conversion of vitamin D metabolites such as kidney or liver diseases or hereditary disorders.

Insufficient vitamin D intake can have serious effects on the bones, which can make them thin, brittle or deformed. Vitamin D deficiency often results in conditions like:

* Rickets which is common in children and is characterised by delayed growth and deformity of long bones.

* Osteomalacia, which occurs in adults and results in thinning of the bones. Signs of proximal weakness and bone fragility are familiar characteristics.

* Osteoporosis which is a condition wherein the bone mineral density is reduced and bone fragility is increased.

<p>Lack of vitamin D may also be linked to increased susceptibility of several chronic diseases like high blood pressure, cancer, tuberculosis, periodontal disease, multiple sclerosis, chronic pain, schisophrenia, depression, affective disorders, peripheral arterial disease and a number of autoimmune diseases such as type-1 diabetes.</p>

Deficiency Symptoms in Adults and Infants

Signs of vitamin D deficiency includes muscle aches, myopathy or muscle weakness and bone pain. These symptoms can occur at any age. Pregnant mothers who have vitamin D deficiency can also cause fetal deficiency.

In younger infants, rickets can produce a condition called craniotabes or softening of the skull. In older babies, rickets can impede or delay sitting and crawling and the closure of the fontanels; bossing of the infants’ skull and presence of costochondral thickening or what is referred to as ‘rachitic rosary’. Children with rickets aged 1-4 years old experience epiphyseal cartilage enlargements on the long bones and delayed walking. Older children and adolescents can experience pain upon walking and in worst cases it can result in ‘bowlegs’ or ‘knock-knees’.

Tetany that is caused by hypocalcemia may go along with vitamin D deficiency in infants and adults. This condition can lead to symptoms such as loss of feeling in the lip or tongue areas and the fingers, facial spasms, and at worst, seizures.

Recommended Daily Dose of Vitamin D

Doses or intake of vitamin D is determined according to age groups. These amounts are vital to maintain normal growth and bone health and also normal calcium metabolism in the body. The adequate intakes or AIs for vitamin D indicated are based on the supposition that the vitamin D is not synthesized by sunlight exposure.

From birth to age 13, the recommended AI for children is 5 mcg or 200 IU; for both males and females aged 14-50 years old, 5 mcg or 200 IU is needed; for both males and females aged 51-70 years of age, 10 mcg or 400 IU is required; both males and females reaching the age of 71 and up require 15 mcg or 600 IU of vitamin D. Pregnant and lactating mothers need 5 mcg or 200 IU of the vitamin.

Vitamin D Food Sources

Only a few food sources contain vitamin D. Best sources of vitamin D are fish meat and fish liver oils. There are also small amounts of vitamin D, in the form of vitamin D3, found in dairy products like cheese and egg as well as beef and liver. Some types of mushrooms also contain varying amounts of vitamin D2.

Common sources of vitamin D include the following:

* Cod liver oil

* Fish like salmon, mackerel, tuna, sardines

* Milk including non-fat, reduced fat, whole or vitamin D fortified

* Margarine

* Cereals

* Egg

* Beef liver

* Swiss cheese

* Fortified orange juice

* Fortified rice or soy beverage

The Need for Increased Amounts

Since obtaining sufficient amounts of vitamin D in the diet can be quite difficult, many people now consume vitamin D fortified foods in order to maintain a healthy dose of the vitamin. There are some groups however who need increased amounts of vitamin D:

* Breastfed infants because vitamin D cannot be supplied by breast milk alone

* Older people due to the fact that synthesis of vitamin D decreases with age and the ability of the kidney to convert vitamin D diminishes

* People with limited sun exposure especially those living in northern latitudes, those wearing robes or head covers or those with occupations that prevent them from having sun exposure

* People with dark skin as more skin pigments like melanin reduces the ability of the skin to produce vitamin D.

* People with fat malabsorption conditions such as Crohn’s disease, cystic fibrosis, liver and celiac disease or patients who have undergone surgical removal of any part of the stomach or intestine.

* People who are obese. An increased amount of subcutaneous fat can snatch more of the vitamin D and somehow alter its release in the circulation.

Interaction of Vitamin D with Prescribed Drugs

Vitamin D supplements have the tendency to react with certain types of prescription medications. These include the following:

* Steroids or corticosteroid medications like prednisone which can cause decreased calcium absorption and also damage the vitamin D metabolism process.
* Weight-loss medications such as orlistat and cholesterol-lowering drugs like cholestyramine also decrease the absorption of vitamin D and other fat-soluble vitamins.
* Phenobarbital and phenytoin increases vitamin D metabolism and decreases calcium absorption.

People need dietary supplements for a variety of reasons. Bodybuilders, for example, would need supplements to aid muscle buildup and strengthening of muscles such as concentrated protein, glutamine, creatine and weight gain powders. Athletes take in supplements to optimize or enhance their performance.

People with illnesses often require dietary supplements such as concentrated iron for anemia. And those on a diet also take supplements to ensure they get the required amount of minerals, vitamins, amino acids, herbs, enzymes and other nutrients. Most however take supplements for optimum overall health. A lot of people also take them to relieve stress and to boost their energy.

What are dietary supplements and how are they different from medicines and over-the-counter drugs?

The Congress in the Dietary Supplement Health and Education Act, which was enacted into law in 1994, defines dietary supplements or nutritional supplements as supplements to the diet. These supplements contain one or more ingredients or their constituents. These are taken orally in the form of liquid, capsule, pill or tablet and are labeled as dietary supplement in the packaging.

Dietary supplements come in different forms, thus the confusion with over-the-counter drugs. The market is flooded with different types and forms of supplements such as capsules, tablets, drinks, energy bars and powders. Most can be purchased even without a prescription. They are available in drug stores, supermarkets, grocery stores, natural food stores, merchandise retailers and in health stores. One can even buy supplements on line. In order to distinguish these supplements from over-the-counter drugs, always read the Supplement Facts label.

Unfortunately, most of these dietary supplements are not regulated. Unlike with drugs, the US Food and Drugs Administration does not check the safety and effectiveness of supplements before they are sold to the public. In fact, the FDA only has authority over supplements once they have already entered the market. Usually, actions are taken by the FDA once a complaint against a certain brand has been received.

Many dietary supplements are guilty of false claims. Testimonials and so-called proofs of the efficiency and effectiveness of supplements abound in print, broadcast and on line media.

Worse, some are even unsafe. And so, extra precaution must be taken when choosing which dietary supplement to take. Always check with the manufacturer for more information. With the tons of promotional materials that abound, always be wary of the information being presented.

Keen in mind that dietary supplements are not intended to cure or prevent illnesses. In addition, although some supplements have beneficial effects, a significant number of them have potential health risks. Some supplements contain active ingredients that can have negative effects on the body, specially when taken in large doses and with other supplements and medicines. Supplementslike calcium, for example, interact with heart medicines like Digoxin, vitamin K counteracts with blood thinners etc.. In addition, too much intake of certain vitamins and minerals such as oil-soluble vitamin E and A, can be toxic to the body.

Pregnant women, nursing moms, those undergoing surgery and people with chronic illnesses should take extra care in deciding whether to take dietary supplements or not.

And so, when choosing supplements, it is always best to consult with a health care provider to avoid serious side effects. Remember, safety first!

The very first step is to undergo a nutritional assessment or evaluation with a health care provider. This will find out what your nutritional needs are and what dietary supplement is best suited to your medical condition.

Dietary supplements are supplements and not are not meant to replace some of the food needed in a healthy daily diet. Thus, bear in mind that no supplement can ever replace a healthy diet.

Never assume that “natural” is always safe. Some natural ingredients, specially if taken in large doses, can interact with medicines and may even result to life-threatening situations.

In addition, there are certain considerations in purchasing dietary supplements such as the quality, availability, your nutritional needs and price.

On a final note, dietary supplements are meant to supplement the body’s nutritional needs. It can never replace the overall health benefits of regular exercise and a healthy diet. And in choosing supplementary diets, safety should always be the main consideration.

Vitamin benefits are substantial. From multi vitamins that offer our body all of the missing nutrients we do not get from eating the wrong foods, to supplements that boost energy, stave off disease, increase libido, and build our immunity. There are many different vitamin benefits.

Most doctors will advise you to take a multivitamin supplement. A multivitamin supplement gives us the nutrients we lack in our daily diets. Many of us do not get the proper vitamins that are derived from certain foods for a variety of reasons. In the world of today, everyone is in a hurry and many of us do not eat right. In addition, many essential vitamin benefits are derived from foods that certain people do not like to eat. Our body still needs these vitamins, however, so taking a supplement is one good way to get the nutrients needed without having to eat foods we do not like.

Vitamin benefits vary as do the different types of vitamins themselves. Vitamin A, for example, has many different benefits. It is shown to be a proven antioxidant and can protect against cancer. Vitamin A is also very useful in curing skin disorders, such as acne. It can even reverse cornea damage in some people.

Foods that are high in Vitamin A contain carrots, broccoli, dairy products, greens, peaches, liver, cherries and squash. When taking Vitamin A, one must be careful about overdosing on this vitamin. Symptoms of a Vitamin A overdose include nausea, vomiting, dry skin and fatigue and may even include hair loss.

Another essential vitamin that provides wonderful vitamin benefits is Vitamin B-1. The vitamin benefits of B-1 include helping with respiratory disorders, acne, fatigue, weakness and effectively fighting off many different diseases. Foods that are high in Vitamin B-1 include broccoli, cauliflower, nuts, eggs, rice, asparagus, turkey, peas, and parsley to name a few.

Vitamin benefits derived from Vitamin B-2 include aiding the body during pregnancy as well as healing wounds and mouth irritations. Many women who become pregnant suffer from anemia and for this reason, Vitamin B-2, along with iron supplements, helps them avoid some of the fatigue that often accompanies the condition. If you have cracked lips, burning eyes, hair loss or insomnia, you may be suffering from a lack of Vitamin B-2. Speak to your doctor about your symptoms as a Vitamin B-2 supplement may be the answer to your problems.

Vitamin B-3 controls cholesterol levels and is used in combination of other medications to treat cardiovascular disease. Vitamin B-3 contains Niacin which has also been used to treat schizophrenia. If you are suffering from fatigue, insomnia, depression or poor concentration, you may have a Vitamin B-3 deficiency. Vitamin benefits from Vitamin B-3 are many and this is one nutrient that you do not want to do without.

Vitamin benefits from Vitamin B-4, which is adrenine, include alleviating fatigue, strengthening the immune system and balancing blood sugar. This vitamin helps with low blood sugar, anemia, allergies, infections, constipation and also stunted growth. Children who do not appear to be growing at a normal rate are often injected with Vitamin B-4 injections. Recent studies have indicated that Vitamin B-4 can help with cancer.

Vitamin B-5 is widely available in most of our foods and actually converts fats and carbohydrates to energy and protein. Vitamin benefits from B-5 are used in post surgical procedures as well as by those who suffer from obesity. Too much of this vitamin, however, can produce diarrhea.

Vitamin benefits from Vitamin B-6 also help convert protein and carbohydrates to energy and helps with anemia and depression. If you are suffering from depression, nausea, vomiting and even symptoms of PMS, ask your doctor about taking a vitamin B-6 supplement that may alleviate your symptoms.

Vitamin B-8 is found in liver, yeast, nuts, chocolate, chicken, eggs, mushrooms, salmon, grains and cauliflower. The vitamin benefits of B-8 are needed for growth as well as the central nervous system and skin and bone marrow. In some cases, Vitamin B-8 is used to treat certain skin disorders.

Many women who are thinking about becoming pregnant are now advised to take Folic Acid, which is found in Vitamin B-9. It is believed that the vitamin benefits of B-9 can prevent birth defects as well as treat anemia. It is advised that women begin taking supplements of this vitamin prior to becoming pregnant.

Vitamin B 10, which is Paba, is not really considered a vitamin, but is used as a sunscreen and is essential for those who wish to avoid the ultraviolet rays in the sun that can cause skin cancer. Vitamin B 10 is not used orally, but directly on the skin. Years ago, Vitamin B 10 was used to fight rheumatic fever.

Vitamin benefits from Vitamin B-12 include relief from menopause as well as anemia. It is also believed that one of the vitamin benefits of B-12 can cure warts. People who are suffering from lower back pain, mental problems, memory loss, weakness and fatigue may actually have a deficiency in Vitamin B-12. A simple blood test to measure the levels off this vitamin in your body can determine if you are indeed suffering from such a deficiency and the solution can be easily remedied with a supplement.

Clearly there are many different Vitamin Benefits from the many different types of Vitamin B. Many people take a Vitamin B complex to alleviate confusion over which vitamin B they should take. A vitamin B complex has many vitamin benefits and is usually the best choice for those who want to make sure they are getting plenty of the essential vitamins found in the B vitamins.

Vitamin benefits from Vitamin C are many. This essential vitamin is proven to ward off colds, prevent some cancers and heal wounds. Vitamin C is a powerful antioxidant and many people swear that by taking Vitamin C, they actually ward off colds. Toxicity from vitamin C is rare as it would take very large doses to cause harm. However, excessive use of vitamin C can produce a false positive in a urine glucose test.

Vitamin D is often found in dairy products and is known to promote strong bones and teeth. It is also essential in the prevention of osteoporosis, and most post-menopausal women are advised to take supplements of Vitamin D to ward off this crippling disease.

Vitamin benefits from Vitamin E range from repairing skin, reducing smoking lung damage and helping with drug therapies for those undergoing cancer treatment. People who have deficiencies of Vitamin E may experience muscle weakness, anemia, increased infections and even fibrocystic breast disease.

Vitamin K is useful in controlling blood clots. This vitamin is found in many foods and is rarely toxic, even if taken to great extremes. Most vegetables contain this valuable vitamin.

Vitamin benefits vary from treating skin diseases, preventing sunburn, curing colds to preventing cancer. Before beginning on any vitamin regiment, consult with your physician. In many cases, a good multivitamin may be all you need to make sure that your body is getting the right amount of the valuable properties found in the above mentioned vitamins.