Both of these are calcium supplements. The one on the left is called OsCal. My husband picked it up for me after my thyroid surgery, as the surgeon told him to. He chose this specific one because it was cheap. Once I looked at the ingredients I decided to look for a healthier brand. The one on the right, OsteoSheath is the one my naturopath recommends. It's a bit pricier, but definitely worth it. Let's look at the ingredients in OsCal:
Now, as a general rule of thumb, if it contains more than ten ingredients it's probably not good for you. And if it has a number (yellow 5 lake) it's definitely not good for you. I also see some parabens in there (methylparaben, propylparaben), which are carcinogens (cause cancer). Now let's look at the ingredients in OsteoSheath:
Do you see the small ingredients list at the very bottom? That's what I'm talking about. It's not perfect, though. I do see Polysorbate 80 and PEG 3350 in the tablet coating. But it's much much better than OsCal. I actually just realized while writing this post that Polysorbate 80 and PEG 3350 were in this supplement. I somehow missed the tablet coating ingredients. But at least it's less than 0.5%. I think I'll keep looking around though.