Regensil is a form of silica. I had never heard of it until your post. just did a quick research and found a review of silicon for osteoporosis from NIH. There may be something to it after all. I will have to do more research, but ....maybe there is hope for it. Not miracle use, but if it helps here are some foods that contain silica
Common dietary sources of silicon [58, 64]. doesn't sound like it can hurt anyway

Dietary source Portion size mg/portion
Beer 12 oz 8.25 mg
Red wine 4 oz 1.70 mg
Raisins 100 gm 8.25 mg
Green beans 250 gm 6.10 mg
High-bran cereal 100 gm 10.17 mg
Whole grain bread 200 gm 4.50 mg
Mineral water 0.5 L 0–40 mg depending on brand
Brown rice with husks 100 gm 2.07 mg