Plant-based burgers are increasingly finding their way on to quick service restaurants menu boards and customers are responding. There were 228 million servings of plant-based burgers ordered at quick-service restaurants in the year ending May, up 10 percent from a year ago, reports The NPD Group. With all of the buzz surrounding the popularity of plant-based burgers some are wondering if veggie burgers are closing in on beef burgers or if the growth of plant-based burgers corresponds to an increase in vegetarianism or veganism. Here are some answers.

Beef burgers are still by far the most popular burger ordered at quick-serves. There were 6.4 billion beef burgers ordered at quick-serves in the year ending May 2019, and although growth is flat compared to year ago, beef burgers are still the top sandwich ordered at U.S. restaurants, reports NPD’s CREST service, which continually tracks how U.S. consumers use restaurants. The strong year-over-year growth of plant-based burgers is primarily due to increased availability at major quick-service restaurant chains.

The increased availability of plant-based burgers on quick-service restaurant menus has created trial on the part of beef burgers buyers. Beef burger buyers, who purchased beef burgers at quick-serves an average of 18 times in the year ending April 2019, did give plant-based burgers a try, purchasing them at quick-serves two times in the period. Another way to look at it is that 95 percent of plant-based buyers have made a beef burger purchase within the past year, according to NPD’s receipt harvesting serving, Checkout.

Although vegetarians and vegans are certainly contributing to the growth in plant-based, they still represent a small (single digits) percentage of the U.S. population and aren’t the primary contributors. A larger percentage of the overall adult population, 18 percent, are trying to get more plant-based foods into their diets, reports NPD’s Health Aspirations and Behavioral Tracker. The popularity of plant-based foods is being fueled by consumers’ want to get more protein in their diets (60 percent of U.S. adults want more protein in their diets), concerns for animal welfare and how meat products are brought to market, sustainability, and what they perceive to be healthier nutrition.

“Plant-based burgers allow consumers to substitute without sacrifice. They get the ‘burger’ experience while assuaging their need for more protein and social concerns,” says Darren Seifer, NPD food and beverage industry analyst. “With that said, U.S. consumers have not given up on beef burgers but are willing to mix things up every now and them.”