What does the research actually say about cacao and mood?
Cocoa can lift mood. I’ve witnessed it first hand. And the research shows a real effect, of a modest size, mostly over days and weeks. Much of what you read online goes further than that… there’s some pretty bold claims out there, so here is what the studies show, and what they do not.
I use three labels. Established means consistent peer-reviewed research in people. Emerging means early, small or animal research, or an idea not yet tested. Traditional means ancestral, cultural and spiritual teaching, which holds its own authority and is shared as meaning. This is the way I teach on my training course.
Mood, anxiety and depression
A review of 9 studies of cocoa-rich products. The findings? Medium short-term improvements in mood and in depression and anxiety symptoms. Few participants, short trials. Established
72 healthy adults drank a cocoa drink daily for 30 days. The findings? They were more calm and contentment at the higher dose after 30 days, but there was no change after a single drink. Established
30 healthy adults drank one cocoa flavanol drink. They reported better mental arithmetic and less mental fatigue during an hour of demanding tasks. Established
60 menopausal women, ate 12g dark chocolate daily for 8 weeks. The findings? Lower depression scores than the group who ate milk chocolate, but their sleep unchanged. Established
Survey of about 2,700 people with depression. The findings? About 45% craved chocolate when depressed. It brought comfort, more than lasting relief. A potential dopamine link to investigate. Established
10 people with chronic fatigue syndrome. They found less fatigue, anxiety and depression with high-cocoa chocolate, however this was a small pilot. Emerging
30 adults with induced muscle pain. They found white, milk and dark chocolate all eased pain equally in these participants. Emerging
Rats with an Alzheimer's-type brain injury. The findings? “The findings suggest that cacao’s ability to improve the balance between oxidants and antioxidants and prevent neuronal loss may be the mechanism underlying its beneficial effect against AD-related cognitive and non-cognitive impairments.” Emerging
Two things stand out. Most of these studies used chocolate or standardised cocoa drinks, so their doses differ from a ceremonial cup. And research on ceremonial cacao itself has still to be done.
The body
Blood pressure and blood flow. Cocoa flavanols lower blood pressure by about 2 mmHg on average and improve how blood vessels widen (Ried et al., 2017). Established.
Minerals. A 25g cup of whole cacao paste holds roughly 80 mg of magnesium, 4 mg of iron, 2.4 mg of zinc and most of a day's copper. Established. Cacao's iron is the plant form and is less easily absorbed, so cacao adds to your intake without correcting low iron on its own. Emerging.
Theobromine. A gentle stimulant that lasts much longer than caffeine and is a mild diuretic. Established.
Magnesium and mood. Magnesium supplements of 248 mg a day improved depression and anxiety scores in a clinical trial (Tarleton et al., 2017). Whether the 80 mg in a cup makes a difference has not been studied. Emerging.
Claims the research does not support
You will often read that cacao floods the brain with "bliss molecules". Cacao does contain anandamide, phenylethylamine (PEA) and tryptophan. The amounts are small, most PEA is broken down in the gut, and there is no human evidence that a cup changes their levels in the brain. Emerging at most.
You may also see claims that cacao has more antioxidants than green tea or red wine. These came from ORAC scores, a measure the US Department of Agriculture withdrew in 2012 because it did not reflect what happens in the body.
Cacao and cocoa
Ceremonial cacao is usually whole cacao paste, lightly roasted or unroasted, with its fat intact. Cocoa powder has most of the butter pressed out and is often alkalised, which can strip out most of the flavanols behind the research (Miller et al., 2008). Established. "Ceremonial grade" has no legal or industry definition, so it is worth asking any supplier how their cacao is processed.
Why setting matters
In the pain study, white chocolate, which has almost no cocoa solids, worked as well as dark. That suggests taste, pleasure and expectation do a lot of the work. Emerging. For anyone holding ceremony this is useful. The setting, the intention and the care around the cup are part of what people experience.
What tradition teaches
Cacao is honoured as a plant medicine of the heart, connected to the heart centre, anahata, and to Pachamama, Mother Earth. Traditional. Increased blood flow is established. Heart-opening is traditional. Both can be true for the people in your circle, and I keep them side by side without using one to prove the other - it’s all about the language that someone speaks, so be confident in using both.
Learning to share this well
If you want to talk to clients about cacao without overclaiming, allowing it to sit firmly in your therapy toolbox whilst doing so safely and inline with ethical guidelines, this is what we cover in the Body, Mind and Spirit module of my CMA accredited Cacao Training & Ceremony, relaunching in 2027. Sign up on the course page to hear about dates first.
This article is for education and is not medical advice. Cacao is not a treatment for depression or anxiety.
