Seeds of change, part 2: flaxseed oil and bone health

Posted by Liz on Dec 7, 2009 in bone health | 0 comments

Last year I wrote a post about the promising effects of flaxseed — a plant-based estrogen–  on hot flashes.  Flaxseed contains antioxidants with weak estrogen properties (lignans) and omega-3 fatty acids. It is also an excellent source of fiber. In addition to its potential ability to reduce the frequency and severity of menopausal hot flashes, it might also be a valuable tool for both heart disease prevention and  boosting the effects of breast cancer therapies.

Another potential use of flaxseed, namely the oil, is to reduce osteoporosis risk. In an animal study published in the International Journal of Food Safety, Nutrition and Public Health, researchers analyzed how the addition of flaxseed oil to the diet of 70 diabetic rats (30 of which had had their ovaries removed) might affect bone health. Note that while studies have shown a clear link between type 1 diabetes and osteoporosis, the evidence is not quite as clear for type 2. Nevertheless, both types of diabetes have been linked with an increased risk for fractures.

After two months, insulin-like growth factor and osteocalcin ( a bone-creating protein) were increased in rats who received the flaxseed oil in their diet. In fact, the levels of these two markers actually reached normal. On the other hand, levels of a marker that actually breaks down bone, fell. The research team attributed the positive effects of flaxseed oil to its omega-3 component.

Certainly, studies are needed in humans to truly determine if flaxseed oil can have a beneficial effect on bone health, especially in post-menopausal women who also have diabetes. In the meantime, it can’t hurt to add a bit of flaxseed oil to your diet. A little prevention may go a long way towards protecting those bones!