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Related Concept Videos

Essential Minerals for Bone Health01:31

Essential Minerals for Bone Health

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The minerals contained in all of the food we consume are essential for our organ systems. However, certain essential minerals, such as calcium, phosphorus, magnesium, manganese, and fluoride, largely affect bone health.
Calcium and Phosphorus
Calcium is a critical component of bones, especially in the form of calcium phosphate and calcium carbonate. Since the body cannot make calcium, it must be obtained from the diet. However, calcium cannot be absorbed from the small intestine without...
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Role of Vitamins in Maintaining Bone Health01:25

Role of Vitamins in Maintaining Bone Health

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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...
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Bone Disorders01:29

Bone Disorders

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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...
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Energy Balance01:19

Energy Balance

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The human body gets energy from the three macronutrients: carbohydrates, proteins, and fats. Energy is released when the chemical bonds in the organic compounds present in the food are broken down. The energy content of food is measured in kilocalories (kcal), defined as the amount of heat required to raise the temperature of one kilogram of water by one degree Celsius. This value is determined by measuring the temperature change of the water surrounding a calorimeter after the complete...
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The Bone Matrix01:18

The Bone Matrix

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Bone contains a relatively small number of cells entrenched in a matrix of collagen fibers that provide an adherent surface for inorganic salt crystals. Both components of the matrix, organic and inorganic, contribute to the unusual properties of bone. Without collagen, bones would be brittle and shatter easily. Without mineral crystals, bones would flex and provide little support. This can be observed by an experiment: when the minerals of a bone are dissolved by soaking the bone in...
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Hormones and Bone Tissue01:17

Hormones and Bone Tissue

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The endocrine system produces and secretes hormones, which interact with the skeletal system. These hormones control bone growth, maintain bone once it is formed, and remodel it.
Hormones That Influence Osteoblasts and/or Maintain the Matrix
Several hormones are necessary for controlling bone growth and maintaining the bone matrix. The pituitary gland secretes growth hormone (GH), which, as its name implies, controls bone growth. This happens in several ways: first, it triggers chondrocyte...
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Related Experiment Video

Updated: Sep 6, 2025

Scanning Skeletal Remains for Bone Mineral Density in Forensic Contexts
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Scanning Skeletal Remains for Bone Mineral Density in Forensic Contexts

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Association between macronutrients intake distribution and bone mineral density.

Shihua Gao1, Xin Qian2, Sicong Huang3

  • 1Guangzhou University of Chinese Medicine, Guangzhou, China.

Clinical Nutrition (Edinburgh, Scotland)
|July 1, 2022
PubMed
Summary

Higher carbohydrate intake is linked to lower bone mineral density (BMD), while higher protein intake is associated with better BMD. Substituting carbohydrates with protein may help prevent bone loss.

Keywords:
Bone mineral densityDietary patternMacronutrients

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Area of Science:

  • Nutrition Science
  • Bone Health Research
  • Public Health Nutrition

Background:

  • Dietary factors significantly influence bone health, but the specific impact of macronutrient distribution on bone mineral density (BMD) remains unclear.
  • Understanding macronutrient intake distribution is crucial for developing targeted nutritional strategies for bone health.

Purpose of the Study:

  • To investigate the correlation between macronutrient intake distribution (carbohydrate, protein, fat) and BMD in adults.
  • To evaluate the association between isocaloric substitution of macronutrients and BMD.

Main Methods:

  • Cross-sectional study using National Health and Nutrition Examination Survey data from 4447 adults (≥20 years).
  • Dietary intake assessed via 24-hour recall; macronutrient distribution calculated as percentage of energy intake.
  • BMD (T-score) analyzed using multivariate regression; low BMD defined as T-score < -1.0.

Main Results:

  • Higher carbohydrate intake correlated with lower T-scores and increased risk of low BMD.
  • Higher protein intake correlated with higher T-scores and decreased odds of low BMD.
  • Isocaloric substitution analysis revealed that replacing carbohydrates with protein was significantly associated with improved T-scores and reduced risk of low BMD.

Conclusions:

  • A diet emphasizing higher protein and lower carbohydrate intake may benefit bone health and prevent bone loss in adults.
  • Further research, including randomized clinical trials and longitudinal studies, is recommended to validate these findings.