Reply To: Does RLT have side effects? Home › Forums › Red Light Therapy › Does RLT have side effects? › Reply To: Does RLT have side effects? November 3, 2020 at 5:52 pm #1260 floatronieParticipant For me I haven’t seen any side effects on my body and I’ve been using red light for quiet some time now. I suggest if you encountered some side effects you better consult to your doctor.