i am using algaecal plus but not their strontium booster. Algaecal plus had just trace strontium but also has the vitamin C, D and K as MK-7,boron, magnesium. I initially picked it as I wasn’t tolerating Citracal and Citracal didn’t have the other vitamins/minerals except D. I tried one bottle of the algaecal plus and it went down well so I did purchase in quantity. It is $$$. I didn’t want to have to take many different supplements. I’ve since really educated myself through this site. I have added Osteo-Stim from Dr McCormick and am researching switching my overall calcium. I stopped reading the algaecal ads/Facebook page. they are very proactive with strontium booster as supplements seems to give everyone great gains but I’m skeptical. I did a full year of evenity with textbook gains and i’ve been very compliant with taking the supplements as they go down easy and don’t cause any GI/constipation issues. I’m into my 4 th month of alendronate to lock in gains and planning bloodwork next month (CTX PINP and Vitamin D) and lifting as heavy as I can, walking daily with a weighted vest.