I ask as I have trouble gaining mass (lean muscle). Alot of mass gainers contain fast-carbs (simple sugars) to induce an insulin spike post-workout to help drive the protein into the muscles and aid protein synthesis.

Peptide is highly refined from what I'm told, hence pricey, but your the first person I spoken to who uses it. So wondered what it was like and if it was worth the extra money. You seem pretty happy with it, so might give it a try.

Been using PHD Synergy ISO-7 for the past few months, and normal whey.