Lebron James’s personal barber is sick of the same question over and over. All people do is ask him about the Cleveland all-star’s shifting hairline.

A professional barber of 11 years, Nick Castemanos told Yahoo Sports in no uncertain terms, “There is no dye. No additives. No preservatives. Everyone thinks he’s dying his hair using [temporary hair colorings] Bigen or Black Ice. It’s all his hair.”

Castemanos been doing this a long time and he’s had to repeat himself. “I’ve become numb to it. It used to bother me. It’s not easy to hear that.”

He started cutting NBA hair in the early 2000s. Former Miami Heat player Dorell Wright introduced Castemanos to guard Dwayne Wade, who then brought in players from visiting teams, including Kobe Bryant.

As his client roster grew, so did his rep. Wade introduced Castemanos to James in 2010 and the two hit it off. In 2014, when James returned to Cleveland, the all-star offered Castemanos a job. Unsure at first, it was his mom who told him, “You better take it.”

Now, Castemanos travels with James as his personal barber, though he still does house calls.

“The only two Cavaliers that I haven’t cut are Matthew Dellavedova and Joe Harris,” said Castemanos.

But James remains priority.

”[Lebron’s] my hardest haircut. He has good hair. You have to cut it right. He just has a few fat patches around the chin that you have to take your time with. You have to have patience. It usually takes about 50 minutes.“

And the two are close. “[Lebron] nicknamed me, ‘Sucka,'” said Castemanos. “He’s like a big brother to me.”