You must try this.

 As against bones thinning with age and not fragility staying, you must use right ration. Supporting bones with fish fat. As benefit vitamin D source, organic form, and fatty acids omega-3 , you are  knowing about vitamin D benefit and about preventing osteoporosis, but about a benefit for omega fats is individual story. These substances blocking processes a loosing of bone mass and affecting on bones density. 

A how to select right fatty acid? These are examples of good product.

North region, where fish catching are Norway, Icelandic Middle price category, very low price having vegetable oil. A  high containing Omega-3 as on 500 mg acids EPK  and DGK   having in amber s acid is a classic for fish fat, as a country for getting is Iceland, with 600 mg of Omega 3 , 270 ml. EPK, DGK  240 ml, and these non-limiting reputation on market, liquid form, and capsules. Check before post and ask in doctor!