Plant-based milk linked to higher depression risk, study finds

People who drink plant-based milk alternatives such as almond, soy, or oat milk are at a higher risk of developing depression and anxiety compared to those who consume semi-skimmed cow’s milk, new research has found.

The study analysed data from more than 350,000 people enrolled in the UK Biobank, following them for over a decade.

It found a significant correlation between the consumption of plant-based milk and an increased likelihood of experiencing depressive symptoms. Specifically, individuals who drank plant-based milks were 14% more likely to report depression.

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The research by scientists from the Southern Medical University in China comes just as Veganuary, the annual event promoting plant-based diets, encourages people to ditch dairy in favour of alternatives.

Milk is a rich source of nutrients such as calcium, which has been shown to boost serotonin levels in the brain – helping to regulate mood.

Researchers believe the fatty acid profile of semi-skimmed milk may offer mental health benefits, potentially protecting the brain compared to full-fat or skimmed milk and vegan alternatives.

“Milk is a rich source of nutrients such as lactose, lipids, protein, and minerals, which are essential for maintaining human health,” the authors of the study said.

The study also found that those who drank semi-skimmed milk were 12% less likely to suffer from depression and 10% less likely to experience anxiety when accounting for age, health, and income.

With plant-based milk consumption rising in recent years, the findings have sparked concern among some experts.

As Veganuary kicks off, experts are urging participants to pay close attention to their nutritional intake, particularly in terms of vitamins and minerals essential for mental wellbeing.