Prompted by favorable reviews here I got some Algin (from Nature's Sunshine). After using it about a week (2x2 capsules/day between meals as suggested here) it seems to be causing some constipation and bloating (bowel movement reduced from once/day to once/2 days with hard stool). Did anyone else have such response to Algin and is it something temporary? I have stopped taking it for now and may try another experiment after I clarify its side-effects. I also use chlorella (2-3 grams/day). Six months ago when I started using chlorella, I tried first Sun chlorella and that gave me constipation and bloating as well. After trying few other brands, I settled on Yaeyama which not only didn't cause any bowel movement problems, but it acutually helped.