 And the reason they don't is because they fear that iron tends to make you constipated and they don't want old people getting constipated. And because my senior vitamins now don't have vitamin, I take an iron supplement. But without that, the reason I discovered that is because when I switched and went to give blood, I was near the bottom. Yep. That's very common. So if you're a senior taking Centrum Silver or, you know. Taking extra iron.