noncaloric
/ˌnɑnˈkælɔrɪk/Definitions
1. adjective
not containing or contributing to calories; not calorie-rich
“The noncaloric sweetener made it a popular choice for diet drinks.”
2. noun
a substance that does not contribute to the calorie content of food or drink
“Some people use noncaloric sugar substitutes as alternatives to regular sugar.”