Gym bros are taking these 'natural' injections to build muscle

Hello! I'm Mia de Graaf. I run health coverage at Business Insider, and I'm stepping in for Joi-Marie this week while she's on vacation. Physically, I will be at home in New York City this summer. Mentally? Not so. This weekend, I am attempting to transport myself from my kitchen to Florence, Italy, with a zesty homemade agnolotti. Garlic, chiles, dill, and lime? Sign me up. On the agenda: But first: Let's check in on gym bros. If this was forwarded to you, sign up here. Download Business Insider's app here. Earlier this week, I fell down a truly epic TikTok rabbit hole. It started with one video: a guy with cartoonish muscles bulging out of a tank top, sitting at his kitchen counter with six vials and a syringe. "It's time for me to get back in shape," he said. "So this is my new peptide stack." A whole hour later, I was deep in the bro wellness multiverse, where peptides rule. Peptides are short-chain amino acids, the building blocks of protein. In theory, you can use different peptides to stimulate different hormones for all kinds of results. You may have heard of peptide serums promising to boost collagen in your cheeks, or the weight-loss drug Ozempic, a peptide that suppresses hunger. Then, there are peptide shots that you can inject for muscle growth. The chiseled men on my phone screen told me that the idea is to "stack" various peptide shots because each one has slightly different effects. One may stimulate lean muscle, or melt fat for muscle definition, or heal your gym injuries, or slow aging. They rattled off laundry lists of technical names: BPC-157, CJC-1295, ipamorelin, follastatin 344, IGF-1… it goes on. There is a catch. As my colleague Hilary Brueck reports, the science behind muscle-building peptides is scant. Still, the trend is booming. Doctors say they are increasingly fielding questions from patients about which peptides they should use to retain muscle mass. The Vitamin Shoppe has seen a huge uptick in searches for peptides. Why? We're in our "natural gains" era. These days, quiet glow-ups are the hottest thing in cosmetic surgery. Similarly, drugs like steroids, which replace growth hormones, are seen as old-fashioned and toxic. Peptides stimulate your body's natural processes, so they're seen as more natural. This summer, beach bods are in — with a little help from a fridge full of syringes. Colon cancer is the second-deadliest cancer in the US, in large part because people aren't getting their colon checked often enough. While colonoscopies are the most reliable tool, a new suite of at-home tests is rapidly expanding. One recently approved screening tool checks your blood for signs that something is awry. Another highly anticipated test, which isn't out yet, may require nothing more than your breath. Four colonoscopy alternatives. There's no one-size-fits-all approach to optimizing your morning routine. However, there are a lot of options to try out and many recipes for success. BI spoke to eight successful women across different industries, from professional dancers to bankers and CEOs. Most said they wake up around 6 a.m., but their routines diverge from there. Some hit the gym, while others do affirmations. Also read: BI's Anneta Konstantinides visited Japan for its famed cherry blossom season in March, right as the country was experiencing record tourism. While the most popular attractions in Tokyo and Kyoto felt crowded, Konstantinides quickly figured out an easy, affordable, and crowd-free way to enjoy the sights in peak bloom. The secret was in Japan's gardens. The Yeti Camino 35 Caryall Tote Bag has a chokehold on moms on TikTok. They tout it as the sleekest, most durable bag for carrying an array of items while also ferrying their children from place to place. It's even got Wall Street's attention. In a recent note, Jefferies analysts said the Camino 35's virality is boosting confidence in Yeti Holdings' stock. Check it out. The BI Today team: Mia de Graaf, deputy executive editor, in New York. Lisa Ryan, executive editor, in New York. Grace Lett, editor, in New York. Amanda Yen, associate editor, in New York. Jump to