@singingbones Thank you. I just wanted to clarify, while the rash is clearing up, I do not know what it was. I used the word hives lightly, although I have never had hives so not sure. I did not feel the need to go to a doctor since it started to clear after stopping the Strontium Boost, which I know is strontium citrate. Probably works for a lot of people, but myself, having Hashimoto's , I have to watch what I take. Just wanted to relay my experience. I did not want to deter others from Algae Cal. I will still take the regular Algae Cal, (I actually took that for months before the Strontium) but never again with the Strontium Boost. Lots of water, calamine lotion and an antihistamine seemed to help. Thanks again.