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( Vitamin D) Vitamin D is a group of fat-soluble prohormones, the two major forms of which are vitamin D₂ (or ergocalciferol) and vitamin D₃ (or cholecalciferol).^[1] The term vitamin D also refers to metabolites and other analogues of these substances. Vitamin D₃ is produced in skin exposed to sunlight, specifically ultraviolet B radiation.

Vitamin D plays an important role in the maintenance of organ systems.^[2]

Vitamin D deficiency can result from inadequate intake coupled with inadequate sunlight exposure, disorders that limit its absorption, conditions that impair conversion of vitamin D into active metabolites, such as liver or kidney disorders, or, rarely, by a number of hereditary disorders.^[2] Deficiency results in impaired bone mineralization, and leads to bone softening diseases, rickets in children and osteomalacia in adults, and possibly contributes to osteoporosis.

Several forms (vitamers) of vitamin D have been discovered. The two major forms are vitamin D₂ or ergocalciferol, and vitamin D₃ or cholecalciferol.

Vitamin D Subcategories Rest, Recovery and Relaxation > Gardening > Thinking and Attitude > Hypnosis for Change > Thinking and Attitude > Neuro Linguistic Programming > Thinking and Attitude > Emotional Freedom Techniques (EFT) > Fitness Courses > Marc David > News Roundup > > Disease and Healing Protocols > > Skin Health and Care > > The Latest Word on Senior Fitness > > The 6 Critical Keys to Dynamic Senior Living > > Vitamin D Articles Multivitamins Are All About Covering Your Bases by Paul Rodgers Healthcare is the general expression used for the entire area of prevention, treatment and cure of illness and disease using the services of medical experts and resources. Healthcare is a very important part of our daily lives and it is imperative th... Is restorAGE right for you? by Jennifer Baxt restorAGE was developed by Stuart Consumer Product Labs in conjunction with Joseph G. Olivieri M.D., an antiaging and growth hormone specialist. restorAGE is a powdered formula that contains 100% vegetarian, all natural ingredients. It was designed a... What You Need to Know About Natural Healthy Skin Care by Laurel Levine Don't you just hate it when products on the market promise natural healthy skin care, only to learn that what you bought wasn't natural at all or giving you the results you expected? If you're searching for a quality skin care product, you wa... 5 Reasons For Working With A Personal Trainer by Bryon Zirker By Bryon Zirker A lot of people think of personal trainers as people who show you how to go about lifting weights. This is actually a small part of what a personal trainer does. When certified a personal trainer provides his/her clients with... Necessary Vitamins in Skin Care Products by Carol Belanger Reading the ingredients on skin care products can be quite confusing. The labels use terms such as pentapeptides 3, Rentinyl, Palmitate and Ascorbyl Pamitate and to the average person these terms are bewildering. However, terms such as the ones li... Untangling The Alzheimer's Brain by Simon Evans Alzheimer’s is a debilitating disease where circuits in the brain literally get ‘tangled up’ and cause cognitive problems. Research into the causes and possible treatments for Alzheimer’s is intensive and beginning to provide rays of hope for familie... How Important is Packaging Design to Your Product's Success? by Kevin A Packaging is the third largest industry in America valued at $110 billion per annum. It is estimated that there are 350 billion packages which comprise of the tiniest item in pharmaceuticals to supersacks used that are used to carry thousands of poun... Some best remedies for hair loss by orson dixon Some best remedies for hair loss What are the best remedies for hair loss problems? There are numerous remedies for hair loss. Nowadays people go to doctor... How to fight Menopause by orson dixon How to fight Menopause What is menopause? Menopause marks the end of female fertility which generally occurs around the age of 45-50 with a little variation. At this time the menstrual cycle stops. Various diseases deve... Herbal Treatment for hair loss by orson dixon Herbal Treatment for hair loss What are main causes of hair loss? Hair loss and thinning is a common problem for the people of the present generation. This is mainly due to the pollution and automobile emissions. Th...