"Blue heart" seems to be a hit or miss, lot of fake on the market.
Few guy at my gym got good result on strength, other complain about the bloat, fattening effect and low result, making them think it was methytest mixed with other stuff.
The best brand of dbal was akrihin, 20mg of akrihin worth 50 mg of blue heart, and i don't think the final result are even comparable.