In February, Wendy’s partnered with its suppliers to use smaller birds it said would improve taste and tenderness in its chicken sandwiches. Wendy’s chicken has always been MSG-free and committed to removing any artificial flavors, preservatives and colors from artificial sources.

In March, Burger King committed to only source chickens from farms meeting Global Animal Partnership standards.

Luna Grill, a Mediterranean fast-casual chain, serves “Never, Ever Gyros” made from beef and lamb that have only been fed a vegetarian diet. The animals are hormone- and antibiotic-free.

Blaze announced its “Keepin’ It Real” initiative in January. The chain is working with suppliers to remove artificial colors, flavors, preservatives and high fructose corn syrup from its ingredients.

In March, Chipotle claimed to become the only national restaurant brand with no added colors, flavors or preservatives in its ingredients. The chain has built its brand around ingredient transparency.

These chains switched to antibiotic-free charbroiled chicken fillet in March. They also introduced all-natural, grass-fed beef in 2014 and 2015, with no added hormones, antibiotics or steroids.

This month Panera introduced new non-carbonated craft beverages. The company said these drinks are made with no artificial sweeteners, preservatives, flavors or colors from artificial sources.