High-Dose α-Tocopherol Supplementation Does Not Induce Bone Loss in Normal Rats.
Shunji Kasai1, Akemi Ito2, Kaori Shindo3
1Vitamin E Information and Technology Section, Customer Joy Department, Eisai Co. Ltd., Tokyo, Japan.
Plos One
|July 7, 2015
Summary
Vitamin E (alpha-tocopherol) supplementation in rats did not negatively impact bone density or structure. Instead, it showed a trend towards increased bone mass, suggesting potential benefits for bone health.
Area of Science:
- Biochemistry
- Orthopedics
- Nutritional Science
Background:
- Oxidative stress influences bone turnover, and antioxidants like vitamin E are studied for their potential to prevent bone loss.
- Previous animal studies on vitamin E's effects on bone health have produced conflicting results.
Purpose of the Study:
- To investigate the in vivo effects of dietary vitamin E (alpha-tocopherol; αT) on bone health in rats.
- To determine if αT influences bone mineral density, bone mass, microstructure, resorption, and osteogenesis.
Main Methods:
- Peripheral quantitative computed tomography (pQCT) and micro-computed tomography (micro-CT) were used to assess bone parameters.
- Bone histomorphometry was performed on lumbar vertebrae and femurs of rats fed varying doses of αT.
- Ovariectomized rats served as an osteoporosis model to validate findings.
Main Results:
- Ovariectomized rats exhibited expected bone loss, reduced bone mineral density, and deteriorated cancellous bone microstructure.
- Dietary αT, even at high doses, did not reduce bone mineral density or compromise bone structure in normal rats.
- Rats fed αT showed a trend towards increased bone mass, indicating a shift towards osteogenesis-dominant bone remodeling.
Conclusions:
- Vitamin E (αT) supplementation does not appear to be detrimental to bone health in normal rats.
- αT consumption may promote bone health by favoring osteogenesis over resorption, suggesting potential therapeutic benefits.
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