One of the easiest breakfast or snacks that you can whip up in five minutes is a smoothie. It’s certainly a go-to breakfast option for many registered dietitians nutritionists (RDN). We asked 10 RDNs their absolute must-have smoothie ingredient for some inspiration when you blend your next smoothie.

Dana Angelo White, MS, RD, ATC, Food Network contributor and author of Healthy Quick & Easy Smoothies puts chia seeds in all her smoothies. "A few sprinkles of chia adds fiber, calcium and inflammation fighting omega-3 fats" says White. "I also use chia to help thicken my smoothies, plus adding them to drinks is an effortless way to make them a regular fixture in your diet."

Katie Sullivan Morford, MS RD author of Rise & Shine: Better Breakfasts for Busy Mornings likes to get a serving of vegetables in her smoothie. That is why she adds cauliflower florets which help boost her intake of vitamin C and plant-rich phytochemicals, which are protective against free radicals. Plus, "cauliflower is low in calories."

Lauren Harris-Pincus, MS, RDN author of The Protein-Packed Breakfast Club opts for frozen riced cauliflower which "adds creaminess and decreases the amount of ice you need so your smoothie isn't watered down. It's a great way to feature veggies in your breakfast without the need to cook them. There's no cauliflower taste either, it takes on the flavor of the other ingredients."

Bonnie Taub-Dix, RDN author of Read It Before You Eat It, and nutrition partner with Almond Breeze enjoys almond milk in her smoothies. "I like knowing that with Almond Breeze almond milk that I’m getting an excellent source of calcium and vitamin E, and that I can store shelf stable Almond Breeze in my pantry for up to one year without opening it so that I have almond milk at my fingertips for last minute smoothies, stews or baked goods."