Tip The Worst Protein for Fit People Search Skip to content Menu Menu follow us Store Articles Community Loyal-T Club Loyal-T Points Rewards Subscribe to Save Search Search The World s Trusted Source & Community for Elite Fitness Diet & Fat LossEatingSex & Hormones Tip The Worst Protein for Fit People Brain atrophy thyroid suppression and decreased strength Well that' s not good Avoid this stuff by Mike Sheridan November 14, 2017September 2, 2022 Tags Diet Strategy, Feeding the Ideal Body, Nutrition & Supplements, Protein, Testosterone Optimization, Tips Since protein can be scarce for those avoiding meat, soy is the vegetarian answer to a diet lacking muscle-building amino acids. It's also peddled as the cholesterol lowering replacement for "evil" red meat. We've not only been told that animal protein and saturated fat are bad, but we've been creatively convinced that plant proteins, like soy, are the solution. Many are surprised to learn that the soybean itself is toxic to humans and livestock. It's one of the most heavily sprayed crops, and close to 93% of it is genetically modified if that's something that concerns you. Soy also contains isoflavones that mimic estrogen in the body (phytoestrogen), bind to estrogen receptor sites, and cause a host of health problems. Hazards of Soy Inhibits reproductive health Alters brain function negatively Suppresses thyroid hormone Disrupts the endocrine system Increases potential for breast and prostate cancer Maybe this is why a study from the Journal of the American College of Nutrition found cognitive dysfunction and brain atrophy in men consuming two or more servings of tofu per week. Researchers in the American Journal of Clinical Nutrition also found significant cell proliferation in breast tissue from soy supplementation in only 14 days. And a Japanese study at the Ishizuki Clinic found that just 35mg of isoflavones per day caused thyroid suppression in healthy individuals in just three months. Sadly, most of the positive information we hear about soy is from companies marketing soy, or the governments controlled by them. It should never be treated as a meat or milk replacement, and selling it as an infant formula should be illegal. In 1992, the Swiss Health Service estimated that two cups of soy milk per day provides the estrogenic equivalent of one birth control pill... and infants fed soy formula the equivalent of five birth control pills. And even if we look strictly at performance, soy protein has been shown to decrease muscular strength, lower testosterone and increase cortisol when consumed post-workout. The exact opposite of what we get from meat and dairy, and the exact opposite of what we need to live a longer, stronger life. Get The T Nation Newsletters Don' t Miss Out Expert Insights To Get Stronger, Gain Muscle Faster, And Take Your Lifting To The Next Level related posts Diet & Fat Loss Tip Drink More Green Tea You've heard about its mild fat-burning benefits. Here's how to really crank them up. Feeding the Ideal Body, Nutrition & Supplements, Tips TC Luoma September 2 Sex & Hormones Tip Testosterone and Prostate Cancer – The Facts Is TRT problematic or is it actually good for the prostate? The answer may surprise you. Living Better, Pharma, Testosterone Optimization, Tips, TRT TC Luoma February 18 Eating Antioxidants - Part 2 Antioxidant supplementation is one of the most confusing areas of nutrition. Hell, if you read the average daily newspaper, you're met with a deluge of information about the latest and greatest alleged antioxidants. If you followed all of the advice of the nutritional pundits, you'd be popping pills filled with exotic substances all day long. Nutrition & Supplements, Super Health Thomas Incledon April 14 Diet & Fat Loss The 7 Simple Muscle-Building Habits Don't overcomplicate muscle growth. It's actually simple. Practice these habits and get bigger. Bodybuilding, Diet Strategy, Feeding the Ideal Body, Nutrition & Supplements Eric Bach October 9