How to Deal With Depression: What the Research Shows Helps

Research on how to deal with depression covers two tracks: changes a person can start alone, such as scheduled activity, exercise and sleep treatment, and professional care with psychotherapy, medication or both. Both tracks have randomized-trial evidence, but its strength varies widely from one strategy to the next.

In 2024, 8.2% of U.S. adults, or 21.4 million people, had a past-year major depressive episode^[1]. Of them, 64.4% received some form of mental health treatment, which left about 7.6 million without it^[1]. U.S. prevalence figures are tracked on the depression page.

Depression in the clinical sense is not ordinary low mood. NIMH defines it by symptoms present most of the day, nearly every day, for at least 2 weeks^[6]. The line between the two is covered in depression vs. sadness.

Most of the trials below enrolled people who met clinical cutoffs for depression. The insomnia trial is the exception: it tested prevention in people who were not depressed when it began.

A 2024 network meta-analysis in The BMJ pooled 218 randomized trials with 14,170 participants who met clinical cutoffs for major depression^[2]. It compared exercise types with each other, with psychotherapy and antidepressants, and with control conditions.

Against active controls such as usual care or a placebo pill, walking or jogging produced a Hedges' g of −0.62, yoga −0.55, strength training −0.49, mixed aerobic exercise −0.43 and tai chi or qigong −0.42^[2]. The authors described all five as moderate reductions in depression^[2].

Effects grew with the intensity prescribed, and strength training and yoga were the best tolerated^[2]. In the same network, cognitive behavioral therapy alone reached g −0.55 and SSRIs g −0.26 against active controls^[2].

The weak point is trial quality. Only one included study met Cochrane criteria for low risk of bias, so confidence was rated low for walking or jogging and very low for every other type^[2]. The authors still concluded that exercise could be considered alongside psychotherapy and antidepressants as a core treatment^[2].

Much of the familiar advice about depression, such as planning small activities instead of waiting to feel like doing them, mirrors behavioral activation (BA). Its first version was developed by Lewinsohn in the 1960s and 1970s, and it later became one of the main components of cognitive behavioral therapy^[3].

A 1996 study found that the activation component alone had effects comparable to full CBT, which led researchers to develop BA as a stand-alone treatment^[3].

The 2026 meta-analysis in Clinical Psychology Review pooled 105 randomized trials with 13,933 patients^[3]. For adult outpatients, BA outperformed control conditions with a standardized mean difference of 0.67^[3].

BA did not differ significantly from other psychotherapies, and its effect remained significant up to 12 months after randomization^[3]. Self-guided versions had smaller but still significant effects^[3].

Results varied widely between trials, with a 95% prediction interval running from −0.11 to 1.46^[3]. Only 4 trials compared BA with medication in adults, too few to estimate that comparison^[3].

Sleep

One trial tested whether treating insomnia changes later depression risk. Researchers randomized 291 adults aged 60 or older with insomnia disorder, and no major depression in the past year, to 2 months of cognitive behavioral therapy for insomnia (CBT-I) or sleep education^[7].

Over follow-up of up to 36 months, incident or recurrent major depression occurred in 12.2% of the CBT-I group and 25.9% of the sleep-education group, a hazard ratio of 0.51^[7]. Because no one was depressed at entry, the trial shows prevention in older adults rather than treatment of an existing episode. Broader data on sleep problems are on the sleep disorders page.

Diet

The SMILES trial randomized 67 adults with moderate to severe depression to 12 weeks of dietary counseling with a clinical dietitian or to a social-support control with the same visit schedule^[8]. Remission occurred in 32.3% of the diet group and 8.0% of the control group, a number needed to treat of 4.1^[8].

The trial was small, and 55 of the 67 participants were already receiving psychotherapy, medication or both^[8]. Diet change was tested as an add-on to that care, not as a substitute for it.

Social connection

Social contact is a common item in coping advice, but none of the trials in this article tested it as a separate treatment, so no effect size is given here. National data on isolation are on the loneliness and social isolation page.

Some episodes do lift without treatment, but how many depends on the setting and the time frame. A 2013 meta-analysis of 19 studies estimated that among untreated adults in primary care samples, 23% would remit within 3 months, 32% within 6 months and 53% within 12 months^[9].

Those samples likely over-represented mild to moderate cases, and the authors cautioned that the estimates may not apply to more severe depression^[9]. The figures also come from studies published up to 2010^[9].

Short-term remission is less common. A 2022 meta-analysis of 16 wait-list-controlled trials, with follow-up of 4 to 12 weeks, found a pooled remission rate of 12.5% without treatment^[5]. By the authors' estimate, 82% to 92% of people on those wait lists still had depressive symptoms when follow-up ended^[5].

NIMH lists cognitive behavioral therapy (CBT) and interpersonal therapy (IPT) among evidence-based psychotherapies for depression^[6]. CBT works on unhelpful thoughts and behaviors, while IPT focuses on relationships and life events that affect mood^[6]. Trial results are covered in cognitive behavioral therapy for depression.

Antidepressants usually take 4 to 8 weeks to work, and sleep, appetite and concentration often improve before mood does^[6]. NIMH advises talking to a health care provider before starting or stopping any medication^[6]. Drug classes and side effects are covered in anti-depression meds.

Combining the two did better than either alone. A 2020 network meta-analysis of 101 studies with 11,910 patients found combined treatment more likely to produce a response than psychotherapy alone (risk ratio 1.27) or medication alone (risk ratio 1.25)^[4]. Psychotherapy alone and medication alone did not differ significantly from each other^[4].

In 2024, 50.9% of U.S. adults with a past-year major depressive episode took prescription medication for their mental health, and 42.4% received care by telehealth^[1]. When other treatments have not worked, NIMH describes brain stimulation therapy as an option^[6]. That stage is covered on the treatment-resistant depression page.

Screening questionnaires put a number on symptom severity, as explained in PHQ-9 depression test. Thoughts of suicide are a reason for immediate crisis support rather than self-management, and the 988 Suicide & Crisis Lifeline takes calls and texts at 988.

Recovering from one episode does not settle the question, because relapse is a separate target of research.

An individual-patient-data meta-analysis of 9 trials and 1,258 patients with recurrent depression found that mindfulness-based cognitive therapy (MBCT) reduced the risk of relapse within 60 weeks compared with not receiving it, a hazard ratio of 0.69^[10]. Against other active treatments the hazard ratio was 0.79, and against maintenance antidepressants in 4 trials it was 0.77^[10].

There was some evidence of a larger benefit in people with more severe symptoms before treatment^[10]. Behavioral activation's effects also held up to 12 months after randomization in the 2026 meta-analysis^[3].

Supporting a family member through depression is a different question, covered in how to help someone with depression. The anxiety counterpart to this guide is how to deal with anxiety.