Vitamin D3 / Cholecalciferol

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Molecule Description

Vitamin D3, scientifically known as cholecalciferol, is a fat-soluble secosteroid that plays a vital role in maintaining overall health. Unlike other essential vitamins obtained only through diet, the human body can produce D3 when the skin is exposed to UVB radiation from sunlight. This process begins with a precursor molecule, 7-dehydrocholesterol, which is transformed into cholecalciferol upon exposure to sunlight. Once made or ingested, D3 is biologically inactive and must undergo two hydroxylation steps to become its active form, calcitriol. The first hydroxylation occurs in the liver, converting it to calcifediol, which is the main circulating form of the vitamin. The second and final hydroxylation takes place mainly in the kidneys, where calcifediol is converted into the potent hormone calcitriol, the form responsible for most of vitamin D's biological functions. The primary and most well-known role of calcitriol is its part in regulating calcium and phosphate balance. It acts on the intestines to improve the absorption of dietary calcium and phosphorus, essential for bone mineralisation and strength. Without sufficient levels of active vitamin D, the body cannot absorb these minerals effectively, leading to conditions such as rickets in children and osteomalacia in adults, both of which are characterised by soft and weak bones. Beyond its functions in the skeleton, calcitriol also serves as a powerful immunomodulator. It modulates the activity of various immune cells, including T cells and macrophages, helping to mount an effective immune response against pathogens. A deficiency in vitamin D has been linked to increased vulnerability to infections and a higher risk of autoimmune diseases. Recent research also emphasises its role in cell growth, differentiation, and the regulation of various hormonal systems, highlighting its multifaceted importance beyond bone health.h.

Uses

For treatment and prevention of Vitamin D and calcium deficiency.
As an adjuvant for the treatment and prevention of osteoporosis and bone disorders.
As a supplement when Vitamin D requirement of body is high such as in elderly, after surgery and in growing children.

Precautions and Warnings

Other General Warnings

Talk to your doctor if

You have any existing medical condition like diabetes, hypertension, kidney or liver problem.
You are on other medications, supplements or following any complementary or integrative health approaches.
You should not take this supplement if you are allergic to any of the component of this supplement.
You have any planned surgery or operation. You may be asked to stop taking these products at least 2-3 weeks ahead of the procedure.
Dietary supplements are intended to supplement the diets of some people and should not be a substitute for a well-balanced, varied diet and a healthy lifestyle.

Mode of Action

How Does It Work?

Vitamin D3 plays a very crucial role in absorption of calcium and phosphorous from the intestine, which is critical for formation, growth and regeneration of bones. Supports healthy bones & teeth and plays a role in cell growth, neuromuscular and immune function. If you do not get enough of Vitamin D, you are more likely to experience fractures, muscle pain and weakness. Adequate levels of Vitamin D in body can prevent the rickets in children and bone softening in adults and elderly.

Frequently Asked Questions (FAQs)

Very few food products are a good source of Vitamin D like cod liver oil, cheese, egg yolk, etc. Vitamin D is formed under our skin when we are exposed to the sun Sun exposure from 10 am to 3 pm at least twice a week for 10-30 minutes can help prevent vitamin deficiency

With the current lifestyle, we are all based indoors in air-conditioned offices, houses and cars with hardly any exposure to the sun. It can eventually lead to an increase in Vitamin D deficiency in all age groups and more fractures and muscle weakness. There is a lot of research happening suggesting that Vitamin D may have a role in preventing the onset of diabetes, cancers like colon, breast and helps build immunity.

Vitamin D deficiency occurs due to inadequate dietary intake, increased requirement, and impaired absorption by body.It can happen due to limited exposure to sunlight, inability of kidneys to convert Vitamin D into active form and poor absorption from intestine.It is also common among individuals allergic to milk products, lactose intolerant and following some specific diet like ovo-vegetarianism and veganism.