I bought these and soon after started having pain in my lower back and side, then moved around front to my stomach area. It was like pulled muscles and very painful. I didn't care for these vitamins because they were so difficult to swallow due to their texture, so I went and got another brand. As soon as I did, the pain I was experiencing went away. I also use vitamin C to combat psoriasis. After I started taking Rexall brand, my psoriasis started coming back. As soon as I started taking my old brand it went away again. I'm not sure what is in the Rexall vitamins but whatever it is, it is bad for me. I threw the bottle away today.