The Supreme Court on Monday said it would review a Colorado law that bars mental health professionals from practicing “conversion therapy” for minors, a discredited practice that attempts to change a person’s sexual orientation or gender identity.

The Supreme Court agreed to hear a challenge to a law in Colorado that bans conversion therapy, an unproven practice aimed at changing the sexual orientations or gender identities of LGBTQ youth. NBC News’ Lawrence Hurley and Angela Cenedella break down the case that raises questions of whether state bans violate the free speech rights of therapists who counsel people.

Colorado is among roughly half the states that prohibit the practice of trying to change a person’s sexual orientation or gender identity through counseling.