I will say this again, for your benefit Trevor: I use A2 milk, which has one of the 2 kinds of casein found in regular milk removed from it. I can stomach this milk, and as a consequence am drinking quite a lot of it daily.
I use it in my breakfast and PWO shakes, both of which have a scoop of soy in them.
IF I switch my SPI for any variety of whey - whether it be isolate or a blend, I suffer abdominal cramping, flatulence and diarrhoea. Without fail.
I've been using soy PI now for nearly a year, and have made great gains, with no side effects.
Eggs are great - but I discovered a while back that the frozen egg white liquid I had been adding to my shakes was exposed to some de-naturing processes during its manufacture, so I scrapped it.
WRT this egg white liquid though, if you can convince me I am wrong to have scrapped it, by all means I will happily include it in my shakes again.
But I'm not scrapping my SPI. It works, and it doesn't harm me the way diary-based protein powders do.
W.A. AMATEUR STRONGMAN
Axle clean-press: 100 kgs (220 lbs)
Bench press: 135 kgs (298 lbs) - 1st PL meet 16th October 2011
Deadlift w/Barbell: 180 kgs (397 lbs)
Deadlift w/Hexbar: 225 kgs (496 lbs)
Farmers walk: 240 kgs (530 lbs), 50 feet
Front squat: 100 kgs (220 lbs)
Log clean-press: 100 kgs (220 lbs)
Strict OHP: 85 kgs (187 lbs) 3 reps
Tyre flip: 260 kgs (573 lbs), 100 feet