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Related Concept Videos

Role of Vitamins in Maintaining Bone Health01:25

Role of Vitamins in Maintaining Bone Health

The growth and maintenance of bone are regulated by a combination of nutritional factors, including vitamins, such as vitamin A, B12, C, D, and K.
Vitamin A
Vitamin A is involved in the process of bone remodeling. Retinoic acid, the active metabolite of Vitamin A, has nuclear receptors in osteoblasts and osteoclasts, which are involved in bone remodeling.
Vitamin B12
Vitamin B12 acts as a cofactor during the formation of osteoblast-related proteins, such as osteocalcin. Vitamin B12 plays a role...
Role of Skin in Vitamin D Synthesis01:23

Role of Skin in Vitamin D Synthesis

The skin plays a crucial role in the synthesis of vitamin D, a vital nutrient for various physiological processes in the body. Vitamin D is unique because it can be synthesized in the skin through a series of chemical reactions triggered by exposure to ultraviolet B (UVB) radiation from sunlight.
The solar UV B rays (290-315 nm) are absorbed by the skin, and 7-dehydrocholesterol (provitamin D3) photolyzes it to previtamin D3, which undergoes a rapid transformation to vitamin D3(cholecalciferol).
Menopause01:28

Menopause

Menopause, a natural biological process marking the end of a woman's fertility, typically occurs between the fifth and sixth decade of life. This phase is characterized by the exhaustion of the ovarian follicle pool, leading to less responsive ovaries despite the high levels of Follicle Stimulating Hormone (FSH) and Luteinizing Hormone (LH). The consequential decrease in estrogen production results in symptoms like hot flashes, heavy sweating, headaches, hair loss, muscle pains, vaginal...
Bone Disorders01:29

Bone Disorders

Aging and its effect on bone remodeling is the most common cause of bone disorders. In young and healthy people, bone deposition and resorption happen at an equal rate to maintain optimal bone health.
Bone deposition is also affected by the levels of sex hormones like estrogen and testosterone that promote osteoblast activity and bone matrix synthesis. When the level of these hormones decreases due to aging, it causes a reduction in bone deposition. As a result, bone resorption by osteoclasts...
Connective Tissue Cell Types01:22

Connective Tissue Cell Types

Connective tissue develops from the mesoderm of a developing embryo and consists of cells, fibers, and ground substance: a gel-like material containing large complexes of carbohydrates and proteins. Connective tissue was first identified as a separate tissue family in the 18th century, and Johannes Peter Muller coined the term connective tissue.
Fat cells (adipocytes), smooth muscle cells (myoblasts), and bone cells (osteoblasts) are some connective tissue cell types. Some immune system cells...
Skeleton and Calcium Homeostasis01:21

Skeleton and Calcium Homeostasis

Calcium is not only the most abundant mineral in bone but also the most abundant mineral in the human body. Calcium ions are needed for bone mineralization, tooth health, heart rate regulation and strength of contraction, blood coagulation, the contraction of smooth and skeletal muscle cells, and the regulation of nerve impulse conduction. The average calcium level in the blood is about 10 mg/dL. When the body cannot maintain this level, a person will experience hypo or hypercalcemia.

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Related Experiment Video

Updated: May 29, 2026

Studies on the Anti-Inflammatory Effect of Xiaoyao Pills in The Treatment of Postmenopausal Osteoporosis in Mice
07:20

Studies on the Anti-Inflammatory Effect of Xiaoyao Pills in The Treatment of Postmenopausal Osteoporosis in Mice

Published on: August 23, 2024

Vitamin D and the postmenopausal population.

Christopher R Holroyd1, Cyrus Cooper, Nicholas C Harvey

  • 1MRC Lifecourse Epidemiology Unit, University of Southampton, Southampton General Hospital, Tremona Road, Southampton, Hampshire SO16 6YD, UK.

Menopause International
|September 10, 2011
PubMed
Summary
This summary is machine-generated.

Vitamin D is vital for calcium balance, but links to diseases like cancer and diabetes are unproven. Current evidence supports testing vitamin D levels for specific symptoms, not general screening.

Related Experiment Videos

Last Updated: May 29, 2026

Studies on the Anti-Inflammatory Effect of Xiaoyao Pills in The Treatment of Postmenopausal Osteoporosis in Mice
07:20

Studies on the Anti-Inflammatory Effect of Xiaoyao Pills in The Treatment of Postmenopausal Osteoporosis in Mice

Published on: August 23, 2024

Area of Science:

  • Endocrinology
  • Nutritional Science
  • Public Health

Background:

  • Vitamin D is crucial for maintaining serum calcium and phosphorus levels.
  • Low vitamin D is prevalent and epidemiologically linked to various diseases, including cancer, diabetes, and multiple sclerosis.
  • Vitamin D deficiency is a known cause of bone diseases like rickets and osteomalacia.

Purpose of the Study:

  • To review the scientific interest and evidence surrounding vitamin D levels.
  • To evaluate the established and potential health consequences of vitamin D deficiency.
  • To assess the appropriateness of population-wide vitamin D screening.

Main Methods:

  • Review of epidemiological studies and scientific literature on vitamin D.
  • Analysis of evidence linking vitamin D levels to various health outcomes.
  • Evaluation of current guidelines for vitamin D assessment.

Main Results:

  • While vitamin D deficiency impacts bone health, causal links to broader diseases like cancer and diabetes remain unestablished.
  • Epidemiological associations exist, but robust evidence for a direct causal relationship is lacking.
  • The evidence most strongly supports assessing serum 25(OH)-vitamin D in cases of specific symptoms, low bone density, or biochemical abnormalities.

Conclusions:

  • A causal link between vitamin D deficiency and major diseases like cancer, diabetes, and multiple sclerosis has not been definitively established.
  • The potential morbidity and mortality from low vitamin D could be significant if causality is proven.
  • Current evidence supports targeted assessment of vitamin D rather than routine population-wide screening or treatment as a standalone intervention.