Can Foods Help with Depression? What the Evidence Says

Part of our Depression articles. For evaluation and medication management, see depression care at Ridge Way.

[Image: A woman choosing greens at a farmers market stall. Foods that combat depression.]

Many people ask whether certain foods can help with depression. Research suggests eating patterns may play a part in mood, but the evidence is still developing. A healthy diet supports depression treatment. It does not replace it. If you are living with depression, food is one piece of care alongside evaluation, therapy, medication or a combination.

This guide covers what the studies show, which foods they focus on, and how to make small changes that fit around depression treatment.

What does the research on diet and depression show?

The short answer is that healthier eating patterns are linked with lower depression risk, and diet trials show a small benefit. The research does not show that any single food treats depression.

Observational studies. A 2019 review pooled 41 observational studies of diet quality and depression. People who followed a traditional Mediterranean diet most closely had lower risk of depression than those who followed it least, based on four longitudinal studies. The authors noted these are observational studies. They show a link, not proof that the diet caused the difference.

Diet trials. A 2019 meta-analysis pooled 16 randomized trials of dietary changes with 45,826 participants. Diet changes reduced depressive symptoms, but the effect was small. The same analysis found no significant effect on anxiety.

What did the SMILES trial find?

The SMILES trial is the study most often cited on this topic. It tested a diet program as an add-on to usual care for adults with moderate to severe depression.

The trial enrolled 67 adults for 12 weeks. One group received seven sessions with a clinical dietitian. The other group received social support sessions. Most participants, 55 of the 67, were already using psychotherapy, medication or both.

At 12 weeks, the diet group improved more on a depression rating scale. Remission was reached by 32.3% of the diet group (10 people) and 8.0% of the social support group (2 people).

The trial has real limits. It was small, and only 56 people completed the 12-week assessment. It was single blind, so participants knew which program they were in.

The authors later responded to critics who raised the risk of expectation bias. SMILES is a promising first step. It does not settle whether diet treats depression, and it tested diet alongside existing treatment, not in place of it.

Which foods do the studies on depression focus on?

The studies above look at overall eating patterns rather than single “mood foods.” The Mediterranean diet is the pattern studied most. MedlinePlus describes it as mostly plant-based meals with plenty of fish and olive oil.

1. Fish and Seafood

The Mediterranean diet includes plenty of fish and other seafood. Cold-water fish such as salmon, mackerel and tuna are sources of omega-3 fatty acids.

2. Vegetables and Leafy Greens

Fresh vegetables are a core part of the Mediterranean pattern. Leafy green vegetables are also a source of folate, a B vitamin.

3. Fruits

Fresh fruits are part of the Mediterranean pattern and are another source of folate.

4. Whole Grains

Whole grains are a staple of the Mediterranean diet.

5. Nuts, Seeds and Legumes

Nuts and legumes are part of the Mediterranean diet. Walnuts, chia seeds and flaxseed also provide plant-based omega-3s. Dried beans, peas and nuts contain folate.

6. Olive Oil

Olive oil is the main fat used for cooking in the Mediterranean diet.

Which foods should you limit?

The 2019 review of observational studies found that avoiding a pro-inflammatory diet was linked with some protection against depression. In the Mediterranean pattern, some foods are eaten only in small amounts.

• Red meat. The Mediterranean diet keeps red meat to small amounts.
• Sweets and desserts. These are also eaten in small amounts or avoided.
• Butter. Olive oil takes its place as the main cooking fat.
• Excess caffeine. Too much caffeine can cause restlessness, shakiness, trouble sleeping and anxiety.

How can you add these foods to your day?

Changing your diet does not have to be overwhelming. Start by adding one or two of these foods to your meals each day. For example, add a handful of spinach to a morning smoothie, snack on nuts, or include fish in your dinner plans.

Meal prepping can also make it easier to stick to a healthy eating plan. Prepare simple, balanced meals ahead of time so you have them on busy days. NIMH’s self-care advice for depression includes eating regular, healthy meals.

Do omega-3 supplements help depression?

The evidence is uncertain. A 2021 review summarized by NCCIH found that if omega-3 supplements have an effect on depression, it may be too small to be meaningful. NCCIH also notes omega-3s may work best as a complement to antidepressant medication rather than a replacement. Eating seafood is recommended over supplements. Talk with your prescriber before starting any supplement.

What else helps besides diet?

Diet works best as one part of a wider plan. NIMH’s self-care advice also includes physical activity, such as 30 minutes of walking a day, and keeping a regular bedtime and wake-up time.

Depression treatment typically involves psychotherapy, medication or both. Therapy is provided by a therapist. You can read about how antidepressant medication is used and what to expect from medication for depression.

When to Get Help

Consider an evaluation when changes in mood, interest, sleep, appetite, energy or focus last two weeks or longer. The same is true when they cause real distress or get in the way of everyday life. Diet changes are not a reason to delay care. You can also take our depression screening as a starting point.

Ridge Way provides psychiatric evaluation and medication management for adults, teens and children age six and older, in Sugar Hill and by telehealth across Georgia. We do not provide therapy or nutrition counseling. When therapy would help, our medical team can refer you to a therapist.

You do not need a referral unless your insurance plan requires one. Request an appointment and we will usually call you back within one business day.