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Related Concept Videos

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).
Vitamins01:30

Vitamins

Vitamins, derived from the Latin word for life, are essential organic substances required in small quantities for optimal growth and overall well-being. Unlike other organic nutrients, vitamins don't act as sources of energy or building materials but rather facilitate these nutrients' utilization by the body. Vitamins are predominantly coenzymes, assisting enzymes in specific chemical actions, like the oxidation of glucose for energy involving B vitamins. Most vitamins are not produced in our...
Energy Transfer in Chemical Reactions01:16

Energy Transfer in Chemical Reactions

Chemical reactions require sufficient energy to cause the matter to collide with enough precision and force that old chemical bonds can be broken and new ones formed. In general, kinetic energy is the form of energy powering any type of matter in motion. Imagine a person building a brick wall. The energy it takes to lift and place one brick on top of another is the kinetic energy—the energy matter possesses because of its motion. Once the wall is in place, it stores potential energy. Potential...
Mutations01:35

Mutations

Mutations are changes in the sequence of DNA. These changes can occur spontaneously or they can be induced by exposure to environmental factors. Mutations can be characterized in a number of different ways: whether and how they alter the amino acid sequence of the protein, whether they occur over a small or large area of DNA, and whether they occur in somatic cells or germline cells.
Chromosomal Alterations Are Large-Scale Mutations
While point mutations are changes in a single nucleotide in...
Mutations01:39

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Overview
Light as Energy01:35

Light as Energy

The energy required to carry out photosynthesis is light— typically electromagnetic radiation from the sun. The range of all possible wavelengths is known as the electromagnetic spectrum.
Photons
A photon is a discrete electromagnetic particle or bundle of energy. Photons are characterized by their frequency, wavelength, and amplitude, similar to the properties of a wave. Waves with higher frequencies transmit more energy and have shorter wavelengths than longer wavelengths that transmit less...

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Studying Chronic Exposure of Mice to Ultraviolet B Radiation
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Studying Chronic Exposure of Mice to Ultraviolet B Radiation

Published on: August 19, 2025

The sunshine vitamin.

Pritpal Singh-Jagatia1, Deborah Lee, Steven Knuckey

  • 1Epidemiology Department, Stockport NHS Foundation Trust.

The Practising Midwife
|December 21, 2012
PubMed
Summary
This summary is machine-generated.

Vitamin D supplementation is recommended for pregnant women to support bone health. Healthcare providers should educate women on vitamin D

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Quantitative Analysis of Dietary Vitamin A Metabolites in Murine Ocular and Non-Ocular Tissues Using High-Performance Liquid Chromatography
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Last Updated: May 15, 2026

Studying Chronic Exposure of Mice to Ultraviolet B Radiation
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Quantitative Analysis of Dietary Vitamin A Metabolites in Murine Ocular and Non-Ocular Tissues Using High-Performance Liquid Chromatography
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Published on: December 27, 2024

Area of Science:

  • Obstetrics and Gynecology
  • Nutritional Science
  • Public Health

Background:

  • Vitamin D's role in musculoskeletal health is established, leading to widespread supplementation.
  • The specific impact of vitamin D on pregnancy outcomes remains controversial and under-researched.
  • Current guidelines recommend vitamin D supplementation for pregnant and breastfeeding women.

Purpose of the Study:

  • To systematically review the role of vitamin D in pregnancy.
  • To clarify the relationship between vitamin D levels and pregnancy outcomes.
  • To inform public health recommendations and clinical practice.

Main Methods:

  • Systematic review of existing literature on vitamin D and pregnancy.
  • Analysis of studies investigating vitamin D supplementation and maternal/fetal health.
  • Evaluation of data on vitamin D's influence on pregnancy complications.

Main Results:

  • Evidence suggests a potential link between vitamin D levels and certain pregnancy outcomes, though causality is debated.
  • The National Institute of Health and Clinical Excellence (NICE) recommends 10 microgrammes of vitamin D daily for pregnant women.
  • Healthcare professionals are tasked with educating expectant mothers about vitamin D's importance.

Conclusions:

  • Further research is essential to definitively establish the cause-and-effect relationship between vitamin D and pregnancy outcomes.
  • Consistent supplementation and education are crucial for optimizing vitamin D levels in pregnant populations.
  • Addressing barriers to supplement access is vital for effective public health implementation.