First of all, we are all different, and we are all aging, during which time we all age differently. Dr Michael Moseley hasn't asked his researchers to do their research on the aging individual, as far as I recall. So someone who is in perfect health, eating organic food, excercising daily, has not reached menopause, probably does not need supplements.
However, (pre-menopause), at the age of 45 I had both bunions surgically corrected, one after the other. With the first, I supplemented with calcium carbonate, ate exceptionally healthily and exercised. And yet my surgeon was disappointed at how long it took for my bones to repair.
The second bunion surgery I supplemented my diet largely with Parmesan, sprinkling it on soups, salads and (vegetable) stews - I am vegetarian - as well as eating high calcium food sources. My second toe healed within the expected time frame.
Conclusion - I do not absorb Ca well from calcium carbonate supplementation. Almost all Ca supplements are from calcium carbonate, and calcium supplements are notoriously difficult to absorb. I have tried Calcium citrate (only Americans offer this) after further toe surgery in 2015, but am unable to confirm whether it worked better than calcium carbonate, as I didn't require further surgery.....
Furthermore both my DH and myself were diagnosed with osteoarthritis many years ago, and have diligently supplemented with glucosamine, which I am told has only a 35-40per cent success rate. Things may have been worse had we not supplemented with glucosamine, but DH is going through one by one, every conceivable aid to prevent his joints ceasing up painfully. Currently living in North Cyprus where the warmth of the climate might help, with lots of swimming - it doesn't! Individual anecdotal research on-going.......