I thought I read somewhere on this forum that taking strontium makes your Dexa scores invalid because strontium absorbs the x-rays from the Dexa more than calcium. So, your t-scores appear to have improved, when your bone density hasn't actually improved. It would be interesting to see if the people having the improved t-scores after taking Algae-cal showed improvement when a REMS Echolight scan was used instead (which doesn't depend on x-rays.). I'm not for or agains Algae-Cal BTW. But I remember someone saying that Dexa scores had to be adjusted if you took strontium.