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Tag: small amounts

  • Everything Can Be Meat

    Everything Can Be Meat

    Recently, a photo of rice left me confused. The rice itself looked tasty enough—fluffy, well formed—but its oddly fleshy hue gave me the creeps. According to the scientists who’d developed it, each pink-tinged grain was seeded with muscle and fat cells from a cow, imparting a nutty, umami flavor.

    In one sense, this “beef rice” was just another example of lab-grown meat, touted as a way to eat animals without the ethical and environmental impacts. Though not yet commercially available, the rice was developed by researchers in Korea as a nutrition-dense food that can be produced sustainably, at least more so than beef itself. Although it has a more brittle texture than normal rice, it can be cooked and served in the same way. Yet in another sense, this rice was entirely different. Lab-grown meat aims to replicate conventional meat in every dimension, including taste, nutrition, and appearance. Beef rice doesn’t even try.

    Maybe that’s a good thing. Lab-grown meat, also widely known as cultivated meat, has long been heralded as the future of food. But so far, the goal of perfectly replicating meat as we know it—toothy, sinewy, and sometimes bloody—has proved impractical and expensive. Once-abundant funding has dried up, and this week, Florida moved toward becoming the first state to ban sales of cultivated meat. It seems unlikely that whole cuts of cultivated meat will be showing up on people’s plates anytime soon—but maybe something like beef rice could. The most promising future of lab-grown meat may not look like meat at all, at least as we’ve always known it.

    The promise of cultivated meat is that you can have your steak and eat it too. Unlike the meatless offerings at your grocery store, cultivated meat is meat—just created without killing any animals. But the science just isn’t there yet. Companies have more or less figured out the first step, taking a sample of cells from a live animal or egg and propagating them in a tank filled with a nutrient-rich broth. Though not cheaply: By one estimate, creating a slurry of cultivated cells costs $17 a pound or more to produce.

    The next step has proved prohibitively challenging: coaxing that sludge of cells to mature into different types—fat, muscle, connective tissue—and arranging them in a structure resembling a solid cut of meat. Usually, the cells need a three-dimensional platform to guide their growth, known as a scaffold. “It’s something that is very easy to get wrong and hard to get right,” Claire Bomkamp, a senior scientist at the Good Food Institute, a nonprofit supporting meat alternatives, told me. So far, a few companies have served up proofs of concept: In June, the United States approved the sale of cultivated chicken from Upside Foods and Good Meat. However it is virtually impossible to come by now.

    The basic science of lab-grown meat can be used for more than just succulent chicken breasts and medium-rare steaks. Cells grown in a tank function essentially like ground meat, imparting a meaty flavor and mouthfeel to whatever they are added to, behaving more like an ingredient or a seasoning than a food product. Hybrid meat products, made by mixing a small amount of cultivated-meat cells with other ingredients, are promising because they would be more cost-effective than entire lab-grown steaks or chicken breasts but meatier than purely plant-based meat.

    Already, the start-up SciFi Foods is producing what has been described as a “fatty meat paste” that is intended to be mixed with plant-based ingredients to make burgers. Only small amounts are needed to make the burgers beefy; each costs less than $10 to make, according to the company—still considerably more than a normal beef patty, but the prices should come down over time. Maybe it sounds weird, but that’s not so different from imitation crab—which doesn’t contain much or any crab at all. A similar premise underlies the plant-based bacon laced with cultivated pork fat that I tried last year. Was it meat? I’m not sure. Did it taste like it? Absolutely.

    Meat can be so much more than what we’ve always known. “We don’t have to make meat the same way that it’s always come out of an animal,” Bomkamp said. “We can be a little bit more expansive in what our definition of meat is.” Beef rice, which essentially uses rice as a miniature scaffold to grow cow cells, falls into this category. It isn’t particularly meaty—only 0.5 percent of each grain is cow—but the scientists who developed it say the proportion could change in future iterations. It’s framed as a way to feed people in “underdeveloped countries, during war, and in space.”

    Eventually, cultivated meat could impart a whiff of meatiness to blander foods, creating new, meat-ish products in the process that are more sustainable than regular meat and more nutritious than plants. Beef rice is one option; meat grown on mushroom roots is in development. Even stranger foods are possible. Bomkamp envisions using the technology to make thin sheets of seafood—combining elements of salmon, tuna, and shrimp—to wrap around a rainbow roll of sushi. In this scenario, cultivated meat probably won’t save the planet from climate change and animal suffering. “It wouldn’t serve its original function of being a direct replacement for commercial meat,” Daniel Rosenfeld, who studies perceptions of cultivated meat at UCLA, told me. But at the very least, it could provide another dinner option.

    Of course, it’s in the interest of the cultivated-meat industry to suggest that cultivated meat isn’t just outright doomed. No doubt some vegetarians would cringe at the thought, as would some dedicated carnivores. But considering how much meat Americans eat, it’s not hard to imagine a future in which cultivated cells satisfy people searching for a new kind of meat product. Imagine the salad you could make with chicken cells grown inside arugula, or bread baked with bacon-infused wheat. But should those prove too difficult to produce, I’d happily take a bowl of beef rice, in all its flesh-tinged glory.

    Yasmin Tayag

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  • ‘Gut Health’ Has a Fatal Flaw

    ‘Gut Health’ Has a Fatal Flaw

    In my childhood home, an often-repeated phrase was “All disease begins in the gut.” My dad, a health nut, used this mantra to justify his insistence that our family eat rice-heavy meals, at the exact same time every day, to promote regularity and thus overall health. I would roll my eyes, dubious that his enthusiasm for this practice was anything more than fussiness.

    Now, to my chagrin, his obsession has become mainstream. Social-media testimonials claim that improving your “gut health” not only helps with stomach issues such as bloating and pain but also leads to benefits beyond the gastrointestinal system (easing problems including, but not limited to, itching, puffy face, slow-growing hair, low energy, acne, weight gain, and anxiety). You can now find a staggering range of products claiming to support digestive health: Joining traditionally gut-friendly fermented foods such as yogurt and sauerkraut are “probiotic” or “prebiotic” teas, cookies, gummies, supplements, powders, and even sodas.

    The reality is less straightforward. Maintaining the health of the gastrointestinal tract, like the health of any body part, is always a good idea. But expecting certain foods and products to overhaul gut health is unrealistic, as is believing that they will guarantee greater overall well-being. Those claims are “a little bit premature,” Karen Corbin, an investigator at the Translational Research Institute of Metabolism and Diabetes, told me. Obsessing over it just isn’t worth the trouble, and can even do more harm than good. “Gut health” cookies, after all, are still cookies.

    In my dad’s defense, your gut does matter for your health. A massive microbial civilization lives mostly along the large intestine, helping the body get the most out of food. Broadly, a healthy gut is one where the different segments of this population—numerous species of bacteria, fungi, and viruses—live in harmony. An unhealthy one implies a disturbance of the peace: One group may grow too powerful, or an invading microbe may throw things off-balance, leading to problems including gastroenteritis and a compromised immune system.

    Diet in particular has a profound impact on the gut—and how it subsequently makes you feel. “Food can have effects on the microbiome, which can then secondarily affect the host,” Purna Kashyap, a gastroenterologist at the Mayo Clinic, told me. The effects of food on a person and their microbes, he added, are generally congruent; fast food, for example, is “bad for both of us.” Neglect to feed your microbiome and the balance of microbes could tip into disarray, resulting in an imbalanced gut and corresponding bloating, stomach pain, and problems with bowel movements.

    Fermented foods such as yogurt and kimchi, long considered good for digestive health, are known as “probiotics” because they contain live bacteria that take up residence in your gut. Other foods are considered “prebiotic” because they feed the microbes already in your gut—mostly fiber, because it isn’t digested in the stomach. Getting more fiber improves regularity and supports a more normal GI system, Corbin said.

    But the fundamental problem with the gut-health obsession is that “there’s no clear definition of a healthy gut microbiome,” Corbin said. The makeup and balance of people’s microbiomes vary based on numerous factors, including genes, diet, environment, and even pets. This means that a treatment that works to rebalance one gut might not work for another. It also means that a product promoting a healthy gut doesn’t mean anything concrete. The idea that achieving gut health, however it’s defined, can solve stomach-related issues is misguided; many diseases can cause abdominal distress.

    Less certain is how much gut health is responsible for benefits beyond the gastrointestinal tract. No doubt the microbiome is connected to other parts of the body; recent research has suggested that it has a role in weight gain, depression, and even cancer, supporting the idea that having a healthy gut could lead to other benefits. But the mechanisms underpinning them are largely unknown. Which microbes are involved? What are they doing? There are “a lot of tall claims based on animal studies that the microbiome influences diabetes or obesity or whatever,” and the translatability of those studies to humans is “really unlikely,” Daniel Freedberg, a gastroenterologist at Columbia University, told me. Until scientists can show definitively that microbe X leads to outcome Y, Corbin said, any relationships between the gut and overall health are “just correlations.”

    None of this is to say that paying more attention to your digestive health is a bad idea. Especially for people diagnosed with gastrointestinal problems like IBS or Crohn’s disease, it can be essential. For everyone else, pursuing a healthy gut with food and supplements can be a nonspecific process with poorly defined goals. The food industry has capitalized on interest in probiotics and prebiotics—as well as lesser-known postbiotics and synbiotics—making products such as “insanely probiotic” yogurt, probiotic-fortified chocolate and spaghetti, and prebiotic sodas. Particularly with probiotics, the specifics are lacking. Which bacteria, and how many of them, actually make it past the stomach into the colon isn’t well understood. “A lot of probiotics are unlikely to contain viable bacteria, and probably very few of them are really making it through to the colon,” Freedberg said.

    Prebiotics are generally more important, although the source matters. Prebiotic fiber is “one of the most important things that determines what bacteria are there,” Freedberg told me, but getting small amounts from fiber-fortified products isn’t going to make a huge difference. The soda brands Poppi and Olipop largely contain inulin, a type of fiber that’s common in food manufacturing for its slightly sweet taste, Freedberg explained, though it probably doesn’t contain a lot, otherwise it would become “sludgy.” Olipop contains about nine grams of fiber per can, roughly the same amount as one cup of cooked lima beans.

    Of course, any product that is inherently unhealthy won’t magically become good for you the moment fiber or live bacteria are added to it. With desserts and salty snacks, no amount of fiber “is going to overcome the issue” that they are full of sugar or salt, Corbin said. Concerns about medium aside, though, gut-health products elicited a shrug from her: Buying foods containing additional prebiotic fiber is a “reasonable approach,” so long as they’re healthy to begin with. If probiotics make a patient feel “fantastic,” Freedberg said, “I’m not going to rock the boat.” Prebiotic and probiotic products may help to a degree, but don’t expect them to overhaul an unhealthy gut one soda at a time. All of the experts I spoke with said that people concerned about their gut health should eat a lot of fruits, vegetables, whole grains, and legumes, and cut out junk that won’t feed their microbiome. In other words, a basic healthy diet is more than enough to achieve good gut health.

    My dad’s gut-health mantra was apparently borrowed from Hippocrates, suggesting that people have been obsessing over the digestive system for thousands of years with the belief that it is the key to overall health. The draw of this idea is its simplicity: Proposing that the body’s many ills can be collapsed into a single mega-ailment makes treatment seem refreshingly uncomplicated compared with the medical interventions needed to address individual problems. That the proposed treatments are easy and self-administrable—sipping fibrous soda, popping bacteria-packed pills—adds to the appeal.

    But perhaps what is most compelling about the idea is that there is some truth to it. Lately, research on the microbiome has seen some promising advances. A large study published in 2022 showed significantly elevated levels of certain bacteria in people with depressive symptoms. Another study, co-authored by Corbin in 2023, was one of the first to show, in a human clinical trial, that a high-fiber diet shifts the microbiome in a way that could promote weight loss. This moment is especially confusing because we are finally beginning to understand the gut’s connections to the rest of the body, and how eating certain foods can soothe it. Much more is known about the gut than in the days of Hippocrates, but still far less than the gut influencers on social media would have you believe.

    Yasmin Tayag

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