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Principles of Drug Action01:24

Principles of Drug Action

Drugs are chemical substances that modify biological responses by interacting with macromolecular targets such as receptors, ion channels, transporters, and enzymes. Pharmacodynamics describes the course of action of drugs leading to the physiological effect at a specific site in the body.
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Updated: Jun 28, 2026

Behavioral Disturbances: An Innovative Approach to Monitor the Modulatory Effects of a Nutraceutical Diet
07:05

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Published on: January 3, 2017

Nutraceuticals: do they work and when should we use them?

Timothy E McAlindon1

  • 1Tufts-New England Medical Center, Boston, MA 02111, USA. tmcalindon@tufts-nemc.org

Best Practice & Research. Clinical Rheumatology
|February 18, 2006
PubMed
Summary

Nutritional factors like vitamins and nutraceuticals may influence osteoarthritis by affecting oxidative damage and cartilage health. While generally safe, their inconsistent results complicate understanding their true benefit for osteoarthritis symptoms.

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Area of Science:

  • Nutritional science
  • Biochemistry
  • Osteoarthritis research

Background:

  • Osteoarthritis (OA) pathophysiology involves oxidative damage, cartilage degradation, and altered chondrocyte function.
  • Nutritional factors may modulate these OA processes.
  • Micronutrients and nutraceuticals are investigated for potential OA benefits.

Purpose of the Study:

  • To review the biological mechanisms of nutritional influences on OA.
  • To assess the evidence for specific micronutrients and nutraceuticals in OA management.
  • To address challenges in interpreting clinical trial results for OA interventions.

Main Methods:

  • Literature review of biological mechanisms linking nutrition and OA.
  • Analysis of clinical trial data for micronutrients (Vitamin C, D) and nutraceuticals (glucosamine, chondroitin, etc.).
  • Evaluation of study heterogeneity and outcome reporting.

Main Results:

  • Preliminary evidence suggests Vitamin C and D may benefit OA.
  • Nutraceuticals like glucosamine, chondroitin, and others have been tested in clinical trials.
  • These supplements are generally safe and well-tolerated.
  • Study heterogeneity and inconsistent results hinder clear interpretation of benefits.

Conclusions:

  • Nutritional interventions show potential mechanisms for influencing OA pathophysiology.
  • Despite safety, the clinical efficacy of many supplements for OA symptoms remains unclear.
  • Further research is needed to reconcile structural effects with symptomatic relief in OA.