I finished up my regular Opticen and started using Opticen +. The first morning I had it as a meal replacement and added milk to it. I left the kitchen for just a few moments but when I got back it was REALLY thick, as in I could use a spoon, kinda like yoghurt. The regular Opticen was still thick with milk added but it went down like liquid. Now I use half milk half water or just water. Has something changed in the mix that's made it this way.

I should say that I thought maybe I added an extra scoop by accident but the following day I had the same thing happen. Still tastes great, just have to adjust water/milk/ice etc.