Who will tell me which one is suitable for middle-aged and elderly people to supplement calcium, Randy or Calch?

Randy is a good choice for middle-aged and elderly people to supplement calcium. Lundi contains 500 mg of calcium per tablet/bag, which is relatively high in calcium products, and contains 200 international units of vitamin D3, which can be well absorbed and fully exerted. A proper amount of mannitol is also added to prevent constipation caused by slow gastrointestinal peristalsis in the elderly. My old man eats Randy calcium, which is healthy and full of energy. None of the old Kalchi people have used it.