I’m very glad you found this article useful, Josefina! Thank you for reading! –Ina, Food Revolution Network Team

Hello Rosemary! Thank you for the question.

Flaxseed is rich in two components relevant here: ALA (its omega-3 fat) and lignans (a type of phytoestrogen). Studies suggest ALA may support bone health, particularly by reducing the inflammation that contributes to bone breakdown. Some research regarding Lignans shows a mild supportive effect, especially in postmenopausal women, while other studies find little effect either way. Importantly, we found no credible studies showing flaxseed actively weakens bone or worsens osteoporosis. One human trial in postmenopausal women specifically found flaxseed improved cholesterol levels without negatively affecting any markers of bone metabolism.

It’s possible the claim you read stemmed from confusion about phytoestrogens in general, since some people worry that anything estrogen-like must be harmful. But research on flax lignans specifically shows they’re weak and generally neutral to mildly protective for bone, not something that breaks bone down.

If you have osteoporosis or are at high risk, the biggest levers for bone health remain adequate calcium and vitamin D, weight-bearing exercise, and adequate protein, and flaxseed doesn’t appear to work against any of that.

If you’d like, this is also a great specific question to bring to your doctor or a registered dietitian, especially if you’re managing osteoporosis directly, since they can look at your full picture and confirm nothing else is at play for you personally. –Ina, Food Revolution Network Team

You are very welcome, Pam! So glad you enjoyed it. –Ina, Food Revolution Network Team

Thank you so much for your kindness, Pam! We are happy you are here. –Ina, Food Revolution Network Team