The Science of Protein Sodas

The Science Behind Protein Seltzers and Sodas 

Functional beverages are redefining the way we drink and shaping the future of wellness. From probiotic and prebiotic sodas to sparkling waters infused with botanical extracts, people are seeking out beverages that do more than just taste good or hydrate. Today’s consumers want drinks that deliver on multiple levels—nutrition, performance, and wellness in every sip. 

Enter protein sodas: the fusion of a bubbly, refreshing drink with the functional punch of protein. On the surface, they sound almost too good to be true—a fizzy treat that also supports muscles, metabolism, and long-term health. But do they really deliver? To answer that, let’s explore protein’s role in the body, how protein behaves in liquid form, what carbonation brings to the table, and how it all ties into the science of healthy aging. 

Why Protein Matters So Much 

Protein is more than just “fuel” for the gym crowd. It provides amino acids—the building blocks behind nearly everything your body does, from creating enzymes that run your metabolism, to transporting nutrients, to producing hormones that keep systems in balance. Unlike carbs and fat, which can be stored for later use, protein has no backup reservoir. Your body needs a continuous supply. 

When intake falls short, the consequences show up as muscle loss. That’s no small issue: the gradual decline of muscle mass with age—called sarcopenia—is now recognized as a major public health concern. Research shows that adults begin losing about 3–8% of their muscle mass per decade after 30, and the pace picks up after 60 (Volpi et al., 2013). And this isn’t just about looking toned—muscle is tightly linked to blood sugar control, metabolism, strength, and independence as we age (Wolfe, 2006). 

Protein also plays a starring role in satiety. A recent Shaklee clinical study confirmed what other research has shown: compared to carbs or fat, protein has a much stronger effect on hormones that tell your brain “I’m full.” That translates to fewer cravings and less overeating later. Randomized trials back this up, showing higher-protein diets lead to greater weight loss and better weight maintenance compared to lower-protein ones, thanks to appetite control and increased calorie burn (Leidy et al., 2015). 

Protein in a Glass (or Can) 

Here’s where format comes in. The way protein is delivered affects how quickly it’s absorbed and put to work. Whole foods like chicken, beans, or eggs contain fat or fiber that naturally slows digestion. Powders and shakes deliver protein more quickly. Sparkling protein beverages take it a step further, offering a refreshing, fast-digesting option. 

Studies show that “fast” proteins—like those in liquid or hydrolyzed form—cause a quicker rise in amino acids in the bloodstream, which stimulates muscle protein synthesis faster than slower-digesting proteins (Boirie et al., 1997). That’s especially useful after a workout when muscles are primed for repair. 

Research also suggests that spacing protein evenly across the day matters. Aim for 20–30 grams of high-quality protein per meal to get the most benefit (Moore et al., 2009). For many people, especially those who skip breakfast or grab carb-heavy snacks, that’s easier said than done. A sparkling protein drink can fill that gap—without replacing whole, nutrient-dense foods. Think of it as a handy supplement, not a substitute. 

What Carbonation Adds 

Why make it fizzy? Beyond the fun, carbonation adds science-backed perks. Carbon dioxide bubbles enhance the perception of refreshment, making people more likely to drink regularly. Some evidence even suggests carbonation can influence appetite. A study by Cuomo and colleagues (2011) showed that carbonated beverages may affect ghrelin—a hormone tied to hunger and energy balance. 

For anyone who finds traditional shakes too heavy, a lighter, sparkling format may simply be more enjoyable, which makes it easier to stick with. 

Evidence vs. Hype 

Let’s set expectations straight. 

Yes: Increasing daily protein intake is beneficial, especially for aging adults and active individuals. In fact, up to 40% of women over 50 don’t meet recommended levels (Fulgoni, 2008). Protein beverages can help close that gap. 

Yes: Replacing sugary sodas or juices with protein-rich alternatives reduces added sugar while boosting nutrition. 

But protein soda isn’t magic. It won’t build muscle without resistance exercise, and it can’t replace a balanced diet. Think of it as one tool in the bigger picture of healthy eating and active living. 

Protein, Muscle, and Longevity 

Protein’s impact goes far beyond the gym—it’s central to aging well. Research shows that muscle strength (not just mass) is a stronger predictor of survival in older adults (Newman et al., 2006). Maintaining strength requires both regular activity and adequate protein intake. 

Here’s the kicker: the current RDA of 0.8 g/kg/day is really just the minimum to avoid deficiency. For older adults, that’s not enough. Because of “anabolic resistance” (where muscles respond less efficiently to protein), experts recommend 1.0–1.2 g/kg/day, spread across meals (Bauer et al., 2013). That’s where convenient, protein-packed beverages can play a big role. 

Protein also supports: 

• Bone health (via IGF-1 stimulation and better calcium absorption) 

• Immunity (by providing raw materials for antibodies and cytokines) 

• Blood sugar regulation (through effects on metabolism and insulin response) 

It’s no wonder protein has earned the nickname: the longevity nutrient. 

Shaklee Sparkling Protein^™: Science Meets Simplicity 

Shaklee’s new Sparkling Protein was developed on the foundation of this science. Each can delivers 40 g of clean, ultra-filtered, grass-fed BLG whey protein without artificial colors, flavors, or sweeteners. That clean-label approach reflects what today’s consumers demand—nutrition they can trust. 

In a recent Shaklee clinical trial, the 40 g sparkling protein beverage showed:^† 

• Higher GLP-1 levels (a hormone linked to satiety) 

• 109% higher plasma BCAAs (the amino acids especially important for muscle) 

• Stronger appetite suppression and prolonged fullness 

The result? A light, refreshing drink that doesn’t just taste good—it works with your body to support muscle, satiety, and healthy metabolism. 

Protein Is What Fuels Longevity 

Protein isn’t just about building muscle—it’s about maintaining strength, regulating appetite, supporting bone and immune health, and promoting longevity. Protein sodas represent a new and convenient way to help people meet their daily needs. 

By pairing the science of protein with the enjoyment of carbonation, Shaklee Sparkling Protein bridges the gap between nutrition and lifestyle. For customers, it’s a win-win: a refreshing drink that fits seamlessly into their day while delivering the benefits of one of the most essential nutrients for lifelong health. 

References 

 ^†Based on a randomized, single-blind, crossover pilot trial to assess the effects of proprietary beverages on acute appetite hormone response in healthy adults. 

• Bauer J, et al. Evidence-based recommendations for optimal dietary protein intake in older people: a position paper from the PROT-AGE Study Group. J Am Med Dir Assoc. 2013;14(8):542–559. 

• Boirie Y, et al. Slow and fast dietary proteins differently modulate postprandial protein accretion. Proc Natl Acad Sci USA. 1997;94(26):14930–14935. 

• Cuomo et al. The role of a pre-load beverage on gastric volume and food intake: comparison between non-caloric carbonated and non-carbonated beverages. Nutr J. 2011 Oct 14;10:114. 

• Fulgoni VL. Current protein intake in America: analysis of the National Health and Nutrition Examination Survey, 2003–2004. Am J Clin Nutr. 2008;87(5):1554S–1557S. 

• Leidy HJ, et al. The role of protein in weight loss and maintenance. Am J Clin Nutr. 2015;101(6):1320S–1329S. 

• Moore DR, et al. Ingested protein dose response of muscle and albumin protein synthesis after resistance exercise in young men. Am J Clin Nutr. 2009;89(1):161–168. 

• Newman AB, et al. Strength, but not muscle mass, is associated with mortality in the Health, Aging and Body Composition Study cohort. J Gerontol A Biol Sci Med Sci. 2006;61(1):72–77. 

• Volpi E, et al. The role of dietary protein in the sarcopenia of aging. Am J Clin Nutr. 2013;99(6):1254S–1260S. 

• Wolfe RR. The underappreciated role of muscle in health and disease. Am J Clin Nutr. 2006;84(3):475–482.