Add this to the list of curious celebrity morning routines.

“We drink a niacin flushing drink, which makes us all red and gets the blood moving.

Sometimes we’ll have celery juice, it just gets the movements going.

Katy-Perry-Niacin-Drink-GettyImages-1166857942

Photo: Getty Images

We need all the help we can get,” she said.

What Is Niacin and Why Would You Supplement It?

(Ah, biology.)

Chan School of Public Health.

Meaning, there’s no clear, scientific link between niacin and those perks.

What Is a Niacin Flushing Drink?

Okay, so what exactly is a niacin flushing drink?

And why are Perry and Bloom sitting at the kitchen table with red faces after drinking it?

As mentioned above, when mixed in water as a powdered form, niacin becomes a drinkable supplement.

“Common affected areas include the upper body and face.

Your skin may also feel warm to touch.”

If that sounds scary AF, fear not.

Is Taking Niacin Safe and/or Effective?