Consuming caffeine offers a slew of potential benefits for bodybuilders. It also improves athletic performance in various tasks, including resistance training. Soy protein is generally safe and without adverse effects for most people. It’s great as part of your nighttime routine or between meals for a steady amino acid release that keeps your muscles happy and growing for hours. Casein is a milk protein, and it’s possible to be intolerant or even allergic to casein proteins. For example, you can chug a 100-gram shake and give your muscle-building materials for the next 12 hours without anything going to waste. You should not use this information to diagnose or treat a health problem or disease without consulting with a qualified healthcare provider. We’re unable to offer personal health advice, but we’ve partnered with JustAnswer who offers on-demand doctors to answer your medical questions 24/7. Spam-free newsletters directly from our health experts and professionals. If you are pregnant, nursing, have a serious medical condition, or have a history of heart conditions we suggest consulting with a physician before using any supplement. We review published medical research in respected scientific journals to arrive at our conclusions about a product or health topic. You will have a testosterone-driven development surge in your muscles between the ages of 17 and 25. And with endless claims of performance-enhancing benefits and hulk-like gains, shopping for sport supplements is can be even harder. Daily doses of leucine between 1.7 and 3.5 grams have been shown to increase muscle protein synthesis in the body, but protein production does not appear to translate to muscle gains. Research found that collagen supplements had no detectable effect on muscle protein synthesis. Whether you’re a bodybuilder or simply aiming to improve your muscle tone, this product helps maximize your results without resorting to synthetic substances. This supplement has made a real impact on my fitness progress, and I feel like I’m getting the most out of my workouts."-Ethan Lewis The substance boosts the amount of nitrogen retained in muscle tissue, which boosts protein synthesis. My lean muscle mass has increased significantly, which has really improved muscle definition. "It seems that as long as you're getting enough total protein, you can choose either a completely vegan or an entirely animal-based protein source, and you'll likely end up at the same place." Now, you could get that protein from chicken instead, and it would cost about the same. It’s well studied and safe to use, but it also might be the supplement I’ve personally wasted the most money on. Now, with HMB and Turkesterone both underperforming, I think it’s time to go with something that should rank high. It's also available as a popular sports nutrition supplement known as creatine monohydrate. While it offers a modest 60 servings, it's a great pick if you're seeking a creatine supplement for short-term use or to leave at the gym or office. This NSF for Sport certified option from Klean Athlete delivers 5 grams of pure creatine monohydrate per scoop without any artificial flavors or added ingredients. For individuals seeking a creatine supplement to accommodate their preferences and take out the guesswork out of dosing, this option is worth exploring. However, the original creatine monohydrate still reigns supreme. You’ll find variants like creatine ethyl ester, creatine pyruvate, buffered creatine, and creatine nitrate, to mention a few, all claiming to be new and improved. More ATP means more energy for high-intensity work, like lifting weights in the gym or sprinting. Creatine is a naturally occurring compound found in muscle cells. However, evidence does not suggest that vitamin D supplementation increases normal-range testosterone levels in men." Another BarBend expert, Dr. Jennie Stanford, M.D., FAAFP, DipABOM, adds, "Vitamin D supplementation has been shown to help improve testosterone levels in those who have vitamin D deficiency and low testosterone. Also, some recent research suggests red ginseng extract may benefit male reproductive health. No bloating, no weird aftertaste — just solid gains and a better workout experience." – Ellery Blackwood It’s like the creatine gave me an extra edge I didn’t know I needed. What surprised me most was how well my recovery improved — I was hitting new PRs without feeling wiped out.