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Why not take the money you would spend on soy and buy some real food. Like beef. It has a superior amino acid profile and ZINC which you may be deficient in. Good luck.
I avoid all soy. I wrecks testosterone.I'm surprised that no one else has any experience with using soy protein...
Soy protein = bitch tits
protein is protein just like a calorie is a calorie no matter it's source correct?
I can tell you that soy is def not optimal due to the amino acid profile. Whey is far better
I avoid all soy. I wrecks testosterone.
No. Aside from the poor amino acid profile, soy contains trypsin inhibitors which block protein degrading enzymes. If you don;t fully digest protein, you don't absorb it. There was a study a while back that showed eating soy even lowers the bioavailability of other protein sources you consume with it because they don't get broken down.
Here's a good rundown from John Kiefer on soy.
http://articles.elitefts.com/nutrition/soy-the-protein-killer/
Thanks for bringing "trypsin" to my attention. From what I just read, when soy is fermented or heat treated, trypsin levels become severely depleted. Soy protein isolate is heat treated I believe.
It should be heat treated, not sure for how long though and it may vary by manufacturer. My concern would be in relying on SPI as the primary source of protein. You will remove 80-90% of the TIAs from heating it properly but having 3-4 servigns a day could impact protein digestibility significantly. I wouldn't worry about this so much from a gains perspective because most BBers overeat protein anyway. What I would be concerned with is fucking up your gut bacteria. You aren't supposed to have large amounts of undigested protein in your colon. This is the problem with gluten, we don't digest it very well and it can fuck up your microbiota. This is also why gluten and legumes such as soy and peanuts tend to be immunogenic, 80% of your immune system is housed in your gut.
You don't really need to worry about phytates because they do not bind minerals, they are already bound to them in whatever you are eating. I agree the estrogenic effect is likely overstated, my primary concern with soy is that we don't break it down very well. Now, if it's hydrolyzed, it doesn't really concern me as much.
Me too, love the grass fed ribeye. Since raising my fats a lot and dropping carbs WAY down - I max out protein and don't need the powder anymore. I didn't know soy had little effect on protein. Is this study from 2013 flawed? The effects of soy and whey protein supplementation on acute hormonal reponses to resistance exercise in men "CONCLUSION:Whey is pretty good and fast absorbing. I used to be more about blends, but I don't eat casein anymore so the only blend I would use is whey/egg. Although, at this point I get all of my protein from food.
That's a great tip. Youtheory makes a collagen protein powder that would have saved me mixing collagen into my shakes separately. Neocell collagen 1&3 was $9 alone.Collagen protein. Thank me later.