I take D3 and K2. My vitamin D level was below normal. It's hard to tell exactly what effect each thing has when you're on medication, so I can only assume that every piece is part of the puzzle.

I'm hesitant to rely solely on calcium supplements, so I try to get two servings of milk (fat-free) a day.

I also use collagen peptides powder.

I take calcium chewables. I had weightloss surgery 2013, and I still have a small stomach, about the size of a walnut, and only 3 feet of small intestines. Chewables are also taken with a small snack and my enzymes. Have you been tested for how much enzymes you still make? EPI or Exo Pancreatic Enzyme Insufficiency. It's a stool test. This test and diagnosis has found its way to Primary Care and Emergency Medical Professionals. The manufacture of the enzymes has a lot of information on their website (Abbvie). If you aren't on Medicare, you may qualify for free vitamins through the manufacture, It's a blessing. Surgeon prefers me to take everything at 200% It's not bad tasting. I picked a popular seller on Amazon, and I can get 1-2 days delivery and it's consistent. (Berimelts).
2 daily vitamins chewable ~ (may be) free from the manufacture using their patient portal
3 Calcium chewables (every 3 hours for me). $20 / 30 days
1 B12 should be the disolving kind and go under your tongue $20 / 90 days $6.50 / 30 days
1 Iron chewable (every other day) $10 / 90 days or $3.65 / 30 days
=================== $45 / month But I get the bigger bottle or count, and you'll see your price per day coming down. Hope some of this was helpful