CBT for depression and low mood: what the research says

CBT has good evidence for low mood and depression. The NHS lists it among the talking therapies it offers for depression. Spanish guidance names it as a first-choice talking therapy for moderate to severe depression. But it does not help everyone.

What a session is

CBT (cognitive behavioural therapy) is a talking therapy where a trained therapist helps you change unhelpful thoughts and habits. You usually have 5 to 15 sessions and practise skills between them.

What the research says

• Low mood and depression: The NHS lists CBT among the talking therapies it offers for depression. Spanish guidance names CBT as a first-choice talking therapy for moderate to severe depression. For mild to moderate depression, it suggests considering a short course of 6 to 8 sessions. Many studies agree, but it does not help everyone. Good evidence it helps · NHS, 2026 · GuíaSalud, 2019 · IQWiG, 2025

We have not yet rated CBT for low mood after a loss, or for stopping low mood coming back. We will add these when we have checked the evidence.

If you are grieving and feel increasingly low or anxious, you may need medical help, so see your GP. NHS, 2026

More on this need: Lift your mood

More on CBT for other needs: CBT: what the research says

Is it safe?

Facing difficult thoughts or fears can feel unsettling at first, so tell your therapist if it does. If you have a serious mental health condition, talk to your GP first. NHS, 2025 · IQWiG, 2025

Sessions on Sissoo complement medical care and never replace it. Please don’t stop or change any treatment without talking to your doctor. This matters most if you take medicine for depression. If you feel very low or think about ending your life, call your local emergency number now.

Checked 25 October 2026. Next check by April 2027. How we rate the evidence.