Chocolate smoothie
Add nut butter, Greek yogurt, and/or oats to a smoothie to make it more satiating.
  • Making smoothies with fruit alone is a mistake that causes blood sugar spikes, a dietitian said.
  • It's important to add healthy fats, protein, and fiber, Nichola Ludlam-Raine told Insider.
  • She shared five recipes for nutritionally balanced smoothies, from carrot cake to apple pie flavors.

A smoothie can be a convenient, nutritious, delicious snack or meal but, depending on the ingredients, it might not be as healthy as you'd think.

If a smoothie is just made of fruit, it isn't nutritionally balanced and can thus lead to blood sugar spikes and crashes, while also not keeping you feeling full for long.