Calcium tablets are not a bone strategy

The standard advice given to Indian adults over fifty is the least effective of the three things that actually build bone. Here is what the tablet can and cannot do.

Jay M. · 29 August 2026 · 3 min read

A bone scan comes back low. The advice is a calcium tablet, sometimes with vitamin D, and that is the end of the conversation.

It happens constantly, and it is not wrong so much as radically incomplete. Calcium is the raw material. It is not the instruction.

Raw material versus signal

Bone is continuously broken down and rebuilt. Two separate things have to be true for it to be rebuilt well: the material has to be available, and the body has to have a reason to lay it down.

Calcium supplies the first. Mechanical load supplies the second.

Delivering bricks to a site where nobody has ordered a building does not produce a building. This is why calcium supplementation alone shows such modest effects on fracture risk in the trial literature, and why it is routinely oversold to people who have not been told about the other half.

The signal comes from load. Bone adds material where strain is highest, and it withdraws material it is not being asked to provide.

What calcium is genuinely for

None of that means skip it.

If your intake is inadequate, you have a real deficiency and correcting it matters — you cannot build with materials you do not have. Many Indian adults, particularly women after menopause and anyone avoiding dairy, are genuinely short.

A reasonable target for adults over 50 is around 1,000 to 1,200 mg of calcium a day, and the first place to look for it is food.

Source	Roughly
Glass of milk (250 ml)	300 mg
Bowl of curd	250 mg
100 g paneer	200 mg
Ragi, 100 g	340 mg
Til (sesame), 2 tbsp	175 mg
Almonds, 30 g	75 mg
Green leafy veg, a serving	100–150 mg

Ragi and til are worth noticing. Both are ordinary Indian ingredients, both are calcium-dense, and both are usually absent from the conversation because the conversation goes straight to a tablet.

Vitamin D is the one to actually check

Calcium without adequate vitamin D is poorly absorbed, and vitamin D deficiency is extremely common across India — including in sunny cities, because most adults work indoors, cover up outdoors, and have more melanin, which slows synthesis.

This one is worth testing rather than guessing. A serum 25(OH)D test is inexpensive and widely available, and unlike bone density it changes quickly enough that retesting is meaningful.

If you supplement one thing on this page based on a measurement, make it this.

The order that works

Load the skeleton. Heavy resistance training two to four times a week, with some impact if joints allow. This is the signal, and nothing substitutes for it.
Keep the muscle. Muscle is what applies force to bone. Losing it removes the stimulus — which is why the years around menopause, when muscle and bone fall together, are the highest-leverage time to train.
Supply the material. Enough calcium, mostly from food. Enough vitamin D, based on a test.
Know your number. A DEXA scan tells you whether you are managing a normal decline or an accelerating one.

The tablet is item three, and it is doing the least work of the four.

Read more on the mechanism in Three levers for bone density after 50.

Sources

Greendale, G. A., Sowers, M., Han, W., et al. Bone mineral density loss in relation to the final menstrual period in a multiethnic cohort: results from the Study of Women’s Health Across the Nation (SWAN). Journal of Bone and Mineral Research 27(1), 111–118 (2012). 1,902 women followed across the menopause transition.
Read the source
Maltais, M. L., Desroches, J. & Dionne, I. J. Changes in muscle mass and strength after menopause. Journal of Musculoskeletal and Neuronal Interactions 9(4), 186–197 (2009).
Read the source

General information, not medical advice. Nothing here is a diagnosis or a treatment plan. If you have a medical condition or are unsure whether something is right for you, speak to your doctor.