I do take extra selenium along with multi's etc. I'm sure they make chewable Vit C. Be careful with Slow-mag. It has other ingredients that you really don't need in a supplement. Maybe before you buy more, look into other brands. I did see the calcium in it is carbonate. I buy powders for calcium and magnesium so I don't have to swallow so many pills. I order mine, but I know the NOW brand is sold in stores more, depending on what is around you.
For the kefir, I'm going to try goat kefir. Just in case I have a problem with lactose it is supposed to be best. If that goes ok, I may try to make my own.
Thanks for the help and support and hopefully you will be feeling even better soon.