Thank you @loriesco for your opinions on protein. The topic of quantity and quality of protein gets complicated depending on at which angle we are looking. The recommended quantity is all over the place. I just stick to 90g per day for myself, divided into 3 meals. Like you, I eat 1/4 to 1/3 of my 90grams in the form of plant protein. There are studies showing quality animal proteins are superior in building muscle and maintain muscle strength while plant proteins are definitely more beneficial to cardiovascular system and in reducing all cause mortality.

With regard to calcium supplement, my understanding is that blood calcium level is not a base in determining whether to supplement or not. Our parathyroid hormone regulates blood calcium to maintain an optimal level so our vital organs such as heart and brain can function normally. For example, when blood calcium is too low and we dont eat calcium rich food or supplement calcium, pth is released from the parathyroid gland and it raises calcium in the blood. It works in the bone to release calcium from bone, it also works on intestines to increase absorption of calcium and among other mechanisms. So if one's parathyroid is functioning normally, one should have a normal blood calcium level (could be at the expense of our bone density if we don't take in enough calcium daily). The general concensus is to get ~1000-1200mg calcium daily from a combination of food sources and/or a calcium supplement for a post menopausal women.