Genetics does play a role in osteoporosis risk, but it is not destiny. Understanding the hereditary component helps you have a useful conversation with your family, not a frightening one.

What genetics contributes

Research shows that up to 80 percent of peak bone mass (the maximum bone density a person reaches in their mid-thirties) is determined by genetics. This means that bone structure, bone size, and how efficiently the body handles calcium and vitamin D are all partly inherited traits.

A maternal history of hip fracture is one of the recognized independent risk factors for osteoporosis. If your mother had a hip fracture, particularly after a minor fall, your own risk is meaningfully elevated beyond what is explained by bone density alone. Your daughters carry a portion of that same genetic blueprint.

What your daughters can do right now

Here is the genuinely hopeful part: the window of greatest opportunity is not at menopause. It is in the twenties and thirties, when bone is still being built and peak bone mass is being determined. A young woman who builds strong bones now is better protected when the natural losses of midlife begin.

  • Calcium - getting adequate calcium through food (dairy, leafy greens, fortified foods) during the bone-building years makes a real difference. Research suggests that 1,000mg per day is appropriate for women under 50.
  • Vitamin D is essential for calcium absorption. Many people are deficient without knowing it. A blood test can check vitamin D levels and guide supplementation.
  • Weight-bearing exercise such as stair climbing, jumping, resistance training. These activities put mechanical stress on bone, which stimulates bone formation. Exercise in youth has a lasting effect on bone density.
  • Avoiding smoking and excess alcohol because both are independent risk factors for bone loss and should be avoided or minimized.
  • Maintaining a healthy weight because being significantly underweight is a risk factor for low bone density.

A 10% increase in early peak bone mass lowers lifetime hip fracture risk by 30%. That’s a big deal.

When should your daughters have a DEXA scan?

Routine DEXA screening typically begins at age 65 for women without risk factors. But with a family history of osteoporosis, particularly a first-degree relative (mother, sister), earlier screening is worth discussing with their doctor. Some guidelines suggest beginning at 60, or earlier if other risk factors are present.

The most useful thing you can do is share your diagnosis with your daughters and encourage them to mention it at their next checkup. It takes thirty seconds and could change the trajectory of their bone health.

Sharing this article with a daughter or sister is one of the simplest ways to pass on what you've learned. The information in Lenari is written for women at any stage of bone health, not just those who already have a diagnosis.