It is not a "hard shell" that is mythology. They has to improve the stability, which they did, all the rest is just noise. Say, can anyone tell us how many deaths were attributed to Embeda. After all if the is russian roulette, then we should know how many deaths there were.
hard shell?????? if the sequestering polymer is acrylic and methacrylic acid esters how is that different from ehytl acrylic co methyl methacrylic???????????