From omega-3s to probiotics, modern researchers have tested dozens of "natural" treatments for anxiety and depression. However, the results might surprise you: only a few demonstrate measurable clinical benefits for the body, and even these effective methods come with serious medical caveats.
"There is still a lot of stigma surrounding medical treatment for mental disorders. People are simply afraid of what others will think of them," explains Nicolas Fabiano, a researcher at the Department of Psychiatry at the University of Ottawa. "This forces patients to seek alternative methods that seem safer, less intensive, or promise faster results."
But do these "natural" remedies really work as well as flashy ads promise? New scientific studies are finally starting to separate the supplements with real potential from those that do not hold up to any scientific scrutiny.
Which supplements for depression do NOT work?
Natural remedies are often advertised as a panacea for a bad mood, but a massive review published in the scientific journal Frontiers in Pharmacology dispels this myth. Most supplements on the market provide almost no clinical benefit.
Take, for example, the most popular ones: multivitamins, B vitamins, calming herbal blends, and melatonin. Despite their immense popularity, deep research regarding their specific impact on clinical depression simply does not exist. "There were too few studies available to draw any substantial conclusions," notes Rachel Frost, the lead researcher from Liverpool John Moores University.
Even the famous Omega-3 fatty acids, which have been considered the ultimate mood booster for years, did not show impressive results. Out of 39 analyzed studies, 23 found no real advantage over a standard placebo. In one experiment, people took three Omega-3 capsules daily for 12 weeks and noticed zero changes in their mental condition. Therefore, science currently cannot recognize them as a reliable antidepressant.
Natural remedies for anxiety showing early promise
Some supplements demonstrate initial signs of effectiveness, but the evidence base remains limited. Herbal extracts (lavender, rhodiola, lemon balm), as well as micronutrients (the amino acid tryptophan, folic acid, and zinc), have shown encouraging results in small experiments.
The main problem lies in the scale of these trials. For instance, most tests involving lavender included groups of up to 150 people. This is far too small a sample size to generalize the results to the entire population. Moreover, these supplements exist in various forms — such as teas, capsules, or tinctures — making it extremely difficult to compare their effectiveness and determine the correct dosage.
✅ Best supplements for depression that actually work
According to current science, four supplements have the most compelling evidence of effectiveness:
- St. John's wort extract: 16 out of 26 clinical trials showed a positive result. Patients taking 600 mg of the extract 1-2 times a day experienced relief twice as often as those taking a placebo. Important note: this applies only to mild to moderate depression.
- Probiotics: 9 out of 16 studies confirmed their ability to reduce depression symptoms. People who took live microbes in addition to their primary treatment for a month felt significantly better.
- Vitamin D: High doses of this "sunshine" vitamin over eight weeks showed a significant reduction in depression scores (in 6 out of 9 studies).
- Saffron: It also demonstrates a consistently positive impact on mood in several controlled clinical studies.
The placebo effect in natural mood boosters
Even when it seems that a supplement has changed a life for the better, part of this success may be tied to belief rather than biology. A 2022 study proved that a proactive attitude toward one's health and a genuine expectation of a positive result can tangibly reduce anxiety levels. In other words, the placebo effect plays a massive role. It is very difficult to quantify in percentages, but doctors urge us not to ignore this powerful psychological factor.
Why natural supplements aren't always safe
The main problem with the modern dietary supplement market is the lack of strict regulation. Supplements do not undergo the same rigorous testing as pharmaceuticals. Regulations vary heavily by country, leading to products appearing on shelves with hidden ingredients, contaminants, or inflated dosages.
"Doctors often don't even know if the patient is actually getting what is written on the label of a pretty bottle," admits Nicolas Fabiano.
The biggest danger lies in the interaction of herbs with traditional medications. For example, the highly effective St. John's wort extract can enter into a dangerous chemical reaction with classic antidepressants (SSRIs), causing severe complications. Therefore, experts emphasize: before "prescribing" yourself any vitamins or herbal supplements for your mood, you must openly discuss it with your healthcare provider.
Source: This material is based on the article "Best supplements for depression research," published on the National Geographic website.
