Kelly Clarkson looks incredible after her recent weight loss, but sources tell Life & Style the daytime diva’s breath has left some scrunching their noses.

“She’s not eating much, and working on an empty stomach has had some nasty side effects, particularly bad breath,” the insider exclusively tells Life & Style.

The 41-year-old Emmy winner raised eyebrows by dropping 40 pounds in a matter of months, a weight loss she revealed came by cutting carbs from her diet and walking more for exercise after being told she was prediabetic.

“A protein diet is good for me anyway,” Kelly previously said. “I’m a Texas girl, so I like meat — sorry, vegetarians.”

Experts say high-protein diets generate more ammonia during the digestive process, which can create breath that’s said to smell similar to cat pee! And not eating enough food in general can decrease saliva production, also contributing to bad breath.

“Clearly, Kelly’s not doing enough for her oral hygiene to combat the effects of her diet,” says the source. “And the way she talks nonstop in people’s faces is enough to make them gag!”

Her breath also isn’t doing her any favors as she tries to find love again after her split from her now ex-manager husband, Brandon Blackstock, in 2020.

“Kelly looks great and has so much going for her, but this whole issue with her breath is holding her back when it comes to the dating scene,” the insider adds. “Someone close to her really needs to step in and give it to her straight.”