Question

Trying to create a question on how vitamin D is up taken in the body and the cycle that it plays a role in. I do not understand how its being uptaken within the body.

Answer 1

Vitamin D

• vitamin D is a fat soluble vitamin
• it is a sterol, it contain steroid nucleus .
• its function like a hormone

FORM OF VITAMIN D

• vitamin D2 (ergocalciferol)
• vitamin D3 (cholecalciferol)

VITAMIN D UPTAKEN IN THE BODY

• During the course of cholesterol biosynthesis 7- dehydrocholesterol is formed as an intermiate
• on the exposure to sunlight, 7 -dehyrocholesterol is converted to cholecalciferol in the skin in dermis and epidermis.
• dark skin pigment (melanin) adversely influence the synthesis of cholecalciferol.
• skin is thge kargest organ in the body.
• the production of vitamin D in the skin is directly proposional to the exposure to sunlight and inversly proportional to the pigmentation of skin
• excessive exposure to sunlight does not result in vitamin D toxicity since excess provitamin D3 are destroyed by sunlight itself.
• vitamin D3 maintain a calcium level in the kidney.

ROLE AND BENEFIT OF VITAMIN D

• Vitamin D help to body absorption calcium. without enough sunshine vitamin, bone can become thin, brittle.
• adequate vitamin D can reduce the risk of cancer
• deficency of vitamin D which can cause alzheimer disease.
• low levelof vitamin D which cause heart failure with high blood pressure
• without adequate vitamin D preclampsia, gestational, diabetes, caesarean section are more common.
• low levelof vitamin D increase the risk of inflammation and rheumatoid arthritis.
• it can modulates cell growth.
• immune fuction
• gene regulation

ABSORPTION

• vitamin D is absorbed from the small intestine for which bile is essential.

DISTRIBUTION

• stored in adipose tissue.

METABOLISM

• Transpotred to the liver then kidney ,where it is activated

EXCREATION

• EXCREATED IN BILE.
• METABOLIZED TO WATER SOLUBLE METABOLITIES AND THEN EXCREATED IN URINE AS WELL.