How convenient. Many academics are too lazy to perform an actual clinical study so they glean data from other studies and do spiffy statistical models to show "no effect".
My expert opinion: Eat calcium, and get plenty of sun exposure (to hell with the dermatologists). If you cannot get sun exposure take VitD3.
Had a neighbor who was told to take a lot of calcium after recovering from a broken leg
Ended up with major heart surgery after his heart valves calcified.
A true expert would not deny the dermatologists. As a person who has scars on my body from the removal of pre-cancerous (thank the Lord) skin lesions, I say be careful with the sun.
And, FWIW, several years ago my GP advised me to stop taking calcium supplements as my blood work was showing abnormally high, and potentially dangerous, calcium levels. The Dr. said most people get adequate calcium through a healthy diet.
For purposes of Vitamin D, 10 minutes of sunshine is plenty. Roll up your sleeves and go for a walk.
“My expert opinion: Eat calcium, and get plenty of sun exposure (to hell with the dermatologists). If you cannot get sun exposure take VitD3. “
You can get bottles of generic D3, in a 5,000 unit dose, for about a nickel a pill at Sam’s Club and Costco. D3 is D3 is D3 - don’t pay extra for a name brand, you’re just rewarding their marketing dept. Oh, and have the pill with a meal that has a lot of fat - it’ll absorb much better into your bloodstream.