Reply To: Does RLT have side effects? Home › Forums › Red Light Therapy › Does RLT have side effects? › Reply To: Does RLT have side effects? September 22, 2020 at 7:01 pm #622 skinnygirlParticipant I am using it for 3 months now and I just joined this forum. There’s a lot I didn’t know. But to answer your question, there have been no bad side effects for me.