To investigate, researchers looked at surveys conducted on more than 600 seniors in the 1980's and 1990's that recorded dietary habits, as well as measurements of bone density.
Researchers found that men and women who ate three or more weekly servings of dark fish, such as salmon or mackerel, had smaller amounts of bone loss, compared to people who ate the least amount of fish.
Men who ate dark fish or tuna at least three times per week also had less bone loss than other men.
What's more, researchers found that it's not just the omega 3s in fish that are involved in bone density. High levels of an omega 6 fatty acid, were also linked to less bone loss in women - but only when women also consumed higher levels of omega 3 fats. In fact, researchers found that high intakes of omega-6 fatty acids combined with low intakes of omega-3 fatty acids resulted in bone loss in men.
Researchers suggest the two fatty acids work together to protect against bone loss.
The study was published in the American Journal of Clinical Nutrition.
Currently Health Canada recommends that adults get at least two servings of fish per week, such as salmon, mackerel, sardines or trout.
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