Hair Laser Comb's

[FineHair]

I saw a couple of hair transplant surgeons in person.

One clinic told me that the laser comb's have been FDA cleared because of (1) Safety & (2) Efficacy. This clinic mentioned that there is also scientific back up indicating the efficacy.

Another clinic, the doctor told me that the combs are not recommended at the clinic and that the FDA only cleared it because of its Safety only not because of it's efficacy.

All in all, I'm confused. Which one is the liar here? Experts speak up. Thanks.