Depression: Omega-3 and Mood, a Deep Connection

Mental health has a molecular code that has been deciphered over the years. In this code, Omega-3s play a fundamental role.

Decades of scientific research have shed light on the role of these fatty acids in preventing and managing depressive symptoms. And this discovery has revolutionized the approach to mental health. 

Early Studies: Omega-3 and Mood


The story of this discovery begins in the 1990s, when a series of studies highlighted an interesting pattern: people with depression tended to have lower levels of Omega-3. It could not have been a simple coincidence: a study conducted at Rockhampton Hospital (Australia), published in the journal Lipids , demonstrated that the lower the Omega-3 reserves, the more acute the depressive symptoms.

But it is not just a question of quantity, it is also a question of balance. The ratio between Omega-3 and Omega-6 plays a crucial role. Research published in 1998 by Biological Psychiatry highlighted how an imbalance in favor of Omega-6 is in fact associated with more severe forms of depression.

And as we age, this connection becomes even more evident. Recent studies have revealed that, in old age, an unbalanced balance of fatty acids in the blood is linked to mood disorders and depressive states.

Already in 1998, The Journal of Nutrition published the results obtained from the research of the Laboratoire de Biophysique Medicale et Pharmaceutique in Tours: the French researchers observed that the Omega-3 in fish oil promoted the activity of dopamine, the molecule that regulates mood. It was as if they had discovered the molecular switch of good mood.

In the same year, on the other side of the Channel, scientists at the University of Sheffield confirmed this intuition: a diet rich in Omega-3 is associated with a lower tendency to develop depressive symptoms.

Omega-3 and its antidepressant action


But the first to demonstrate the real effectiveness of Omega-3 in improving emotional balance were researchers at Harvard Medical School in Boston.

Here, Dr. Andrew Stoll and his team challenged the conventional treatment of manic-depressive syndrome (or bipolar disorder), a disorder in which severe depressive episodes alternate with periods of intense euphoria. The drug that was used to treat the syndrome was lithium, a remedy that however caused toxic and serious side effects. Andrew Stoll was therefore looking for a less harmful alternative and his attention turned to the Omega-3 EPA and DHA contained in fish oil.

His approach? One group of patients took a daily dose of 9 g of EPA and DHA, in a ratio of 1 to 1.5; the control group instead took olive oil, which does not contain Omega-3.

After only 4 months of treatment, the study was suspended: the patients treated with fish oil showed such significant improvements that continuing to administer olive oil to the control group became ethically unacceptable.

This discovery sparked a veritable cascade of research. In Israel, at Ben Gurion University, pure EPA was shown to reduce depressive symptoms by 50% in more than half of patients in just 3 weeks – even in subjects resistant to traditional antidepressants.

Shortly thereafter, scientists at Swallownest Court Hospital in the UK published the results of their study in the Archives of General Psychiatry highlighting all the depressive symptoms that Omega-3s can alleviate:

  • sadness;
  • lack of energy;
  • anxious states;
  • insomnia;
  • decreased libido;
  • suicidal tendency.

But the effectiveness of Omega-3 goes beyond the confines of clinical depression, extending to a more intimate and personal sphere: emotional relationships. These essential fatty acids can in fact help women who suffer from mood swings and uncontrollable emotions and who, for this reason, have complicated family relationships. At McLean Hospital in Belmont, in the United States, a group of researchers observed that a treatment of just 8 weeks with Omega-3 supplements rich in EPA can improve and stabilize mood and reduce the tendency to aggressive reactions.

Omega-3 in the treatment of postpartum depression


Other research has instead focused on the benefits of Omega-3 in the treatment of depressive states that can accompany or follow pregnancy.

During pregnancy, the mother's body performs an important act of love: it transfers DHA to the baby to support the development of the nervous system of the newborn. However, this generous gesture lowers the mother's reserves of Omega-3 and exposes her to the risk of developing depressive symptoms.

Starting from these assumptions, researchers at the National Institute on Alcohol Abuse and Alcoholism in Rockville have shown that low levels of DHA and low fish consumption can increase the risk of postpartum depression. Dutch scientists at the University Medical Center in Rotterdam have also confirmed this: new mothers who struggle with depression show a DHA deficiency.

But the research results are even more surprising, because they reveal that the antidepressant role played by Omega-3 does not only concern mothers, but also children: a team of Brazilian researchers from the Universidade Federal do Paraná has in fact demonstrated that the regular consumption of fish and fish oil during pregnancy and breastfeeding creates a sort of natural shield that protects the child from the risk of developing future symptoms of depression, since a reserve of EPA and DHA is built in the cortex and hippocampus of the fetus.

Omega-3, all the benefits


From simple mood swings to postpartum depression, from stress-induced aggressive behaviors to alcohol-induced neurological damage, from schizophrenia to dementia.

The data collected over years and years of studies and research shows us that yes, Omega-3 fatty acids can be truly effective in preventing, controlling and treating various disorders that affect the psychic sphere. This is the superpower of Omega-3: to touch, to improve, every aspect of your health, both mental and physical.

However, we would like to emphasize that these essential fatty acids should be considered as a potential supplement to traditional therapy, not as a replacement. Depression is a medical condition that requires professional management, so always consult your doctor before making any changes to your treatment regimen or before starting any new treatment, including Omega-3 supplementation.