- Dr. Charles Puza is a dermatologist practicing in New York.
- He shares science-backed health and beauty tips on TikTok
- Dr. Puza recently explained why he doesn’t recommend mixing berries with dairy
A doctor has revealed the surprising reason why you should never mix berries with milk or yogurt in your smoothies.
Dr. Charles Puza, a dermatologist practicing in New York, has more than 1.4 million followers on TikTok, where he shares science-backed health and beauty tips.
He recently stitched a video by content creator Dana Bobyn making a high-protein smoothie with banana, blueberries, almond butter, Greek yogurt, protein powder and spinach.
Dr. Puza noted that he loves smoothies before pointing out the one ingredient she should have skipped if she wanted to reap the full health benefits of berries.
Dr. Charles Puza, a dermatologist practicing in New York, revealed in a recent TikTok video the surprising reason why you shouldn’t mix berries with dairy.


The Doctor put together a video of content creator Dana Bobyn making a high-protein smoothie with banana, blueberries, almond butter, Greek yogurt, protein powder and spinach.

Dr. Puza pointed out the one ingredient she should have skipped if she wanted to take full advantage of the berries’ health benefits.
“No offense to this creator, because I feel like no one really teaches this,” he said.
“But if you mix dairy with antioxidant-rich foods like blueberries — which you want to boost your smoothies with — you actually cancel out the absorption of antioxidants.”
“It’s true,” he added, saying he would share the study in the comments.
THE study Dr. Puza found that eating blueberries with milk reduces the absorption of polyphenols, a type of antioxidant.
Antioxidants are chemicals that neutralize the activity of harmful free radicals, linked to diseases such as heart disease and cancer.
Berries, vegetables, beans, and teas are known to be rich in antioxidants, but that doesn’t necessarily mean you should stop consuming them along with dairy.
Although research has shown that milk decreases antioxidant capacity to some extent, there is not enough evidence that consuming dairy with antioxidant-rich foods and drinks affects the health benefits, according to Health Line.
Dr. Puza’s video has been viewed nearly 30,000 times and received mixed reviews from commenters.

“If you mix dairy with antioxidant-rich foods like blueberries…you’re actually canceling out the absorption of the antioxidants,” he explained.








Dr. Puza’s video has been viewed nearly 30,000 times and received mixed reviews from commenters who were unconvinced by the study he was referring to.
“This is the information I need.” Good to know!’ one person responded.
“WHAT,” someone else added. “I did it wrong.”
“I also recently saw an article saying to NEVER mix bananas with berries. It’s about breaking down polyphenols,” added another.
Others said they didn’t find the study compelling enough to stop mixing dairy with berries.
“This was a study of 11 people. Do you cite other data or is this the only study? That’s really a question,” one user asked.
“The creator wasn’t making an antioxidant smoothie, she was making a protein smoothie. Blueberries and dairy are delicious and a great pairing,” someone else argued.