Olive Oil Before Bed: What It Does and What It Doesn't
Olive oil before bed arrives with a long list of promises: better sleep, an easier morning, a flatter stomach, less inflammation. A tablespoon of extra virgin olive oil at night is a perfectly ordinary thing to eat, so the real question is whether bedtime does anything a spoonful at dinner would not. The honest answer is that no published study has tested night-time olive oil against the same amount taken earlier in the day. What has been studied are the individual claims — sleep, constipation, reflux, weight — and they are not equally well supported. This guide sorts them by the evidence, names the studies, and explains the one bedtime factor that actually has data behind it.
For our own oil, see our cold-pressed organic Marrakech olive oil.
The Short Answer
- No study has compared olive oil before bed with the same amount at another time of day, so any bedtime-specific benefit is untested.
- The best-supported claim is constipation: Joukar and colleagues' 2025 double-blind trial in 140 adults found extra virgin olive oil eased symptoms more than refined oil over four weeks — but it tested the oil, not the hour.
- The sleep claim is weak: melatonin has been measured in extra virgin olive oil and Mediterranean diets are linked to better sleep in observational studies, but no trial shows a spoonful improves sleep.
- The one timing factor with data points the other way: Fujiwara and colleagues' 2005 case-control study linked going to bed within three hours of dinner with much higher odds of reflux disease.
- A tablespoon carries about 120 calories whether you take it at 10pm or at noon; the clock does not change the arithmetic.
- If you enjoy an evening spoonful, take it with or soon after dinner rather than on your way to the pillow.
What Happens to a Spoonful of Olive Oil at Night
Olive oil taken at bedtime is digested exactly as it is at any other time: bile emulsifies it in the small intestine, enzymes break it down, and it is absorbed over the following hours. Your body does carry out repair and hormonal work overnight, but there is no evidence that a tablespoon of oil plugs into that work in a special way.
What does change at night is posture. Fat slows the emptying of the stomach, and lying flat removes gravity's help in keeping stomach contents down. For most people a single spoonful is unremarkable; for people prone to heartburn, it is the combination clinical advice tells them to avoid.
For the neat spoonful in general — tolerance, taste, and the morning version of the habit — see our guide to drinking olive oil. This article stays with the night-time question.
The Bedtime Claims, Sorted by Evidence
Most articles on this topic list the benefits of olive oil in general and attach them to bedtime. The table separates the two: each popular claim, what has actually been studied, and whether any of it involved night-time timing.
| Claim | What has actually been studied | Was bedtime tested? | Honest verdict |
|---|---|---|---|
| Eases constipation | Randomised trial: 140 adults with chronic constipation, two tablespoons a day for four weeks, extra virgin vs refined olive oil (Joukar et al., 2025) | No — the trial tested the oil and the amount | Reasonable evidence for the oil; none for the timing |
| Improves sleep | Melatonin detected in extra virgin olive oil in the laboratory (de la Puerta et al., 2007); Mediterranean diet linked to better sleep in observational studies | No | Unproven; no trial of olive oil and sleep |
| Settles digestion overnight | Evidence on late eating points the other way: short dinner-to-bed time linked to reflux disease (Fujiwara et al., 2005) | Indirectly — and not in olive oil's favour | Can worsen heartburn in people prone to it |
| Helps weight loss | Olive oil studied as a replacement for other fats within whole diets | No | About 120 calories a tablespoon at any hour; only a swap helps |
| Reduces inflammation overnight | Oleocanthal inhibits COX enzymes in laboratory work (Beauchamp et al., 2005) | No | A mechanism in vitro, not an overnight effect in people |
Where there is real evidence, it concerns olive oil itself — its grade, its amount, its place in a diet. None of it isolates the hour before sleep. That does not make the habit harmful; it makes the bedtime framing a marketing detail rather than a finding.
Sleep: Melatonin, the Mediterranean Diet and What Hasn't Been Tested
The sleep claim usually rests on melatonin. In 2007, de la Puerta and colleagues reported in Food Chemistry that melatonin is present in olive oil, with the Spanish extra virgin samples they analysed containing almost double the levels found in refined olive and sunflower oils. That is a laboratory measurement of what is in the bottle. The study did not give the oil to anyone or measure sleep.
The second strand is dietary pattern. Campanini and colleagues followed 1,596 adults aged 60 and over in Spain's Seniors-ENRICA cohort and reported in Sleep in 2017 that those with the highest adherence to a Mediterranean diet had lower odds of poor sleep quality after a median of 2.8 years. A 2024 systematic review in Nutrients by Godos and colleagues gathered 23 observational reports and found the same general association. Both are observational, both concern a whole way of eating rather than olive oil alone, and the review notes the relationship may run in both directions.
An evening spoonful may be part of a calming routine you enjoy, and that has value of its own. But no trial shows that olive oil, at bedtime or otherwise, improves sleep.
Constipation: The Best-Supported Claim, With a Caveat About Timing
This is where the evidence is genuinely stronger. In a double-blind randomised trial published in the Caspian Journal of Internal Medicine in 2025, Joukar and colleagues assigned 140 adults diagnosed with chronic constipation to two tablespoons a day of either extra virgin or refined olive oil, taken raw, for four weeks. Symptom scores improved in both groups, and significantly more in the extra virgin group, with stool form also better from the second week onwards.
The limits matter. It was a single four-week study measuring questionnaire scores, with no group taking no oil at all — so it shows extra virgin oil outperforming refined oil rather than proving either beats doing nothing. It tested the grade and the amount, not the time of day.
The practical reading: the quality of the oil appears to matter more than the clock. Persistent constipation, a change in bowel habit or pain belongs with a GP, not a food.
The One Bedtime Factor That Has Been Studied: Lying Down Soon After Eating
The single piece of timing research relevant to this habit does not favour it. In a matched case-control study published in the American Journal of Gastroenterology in 2005, Fujiwara and colleagues compared 147 people with gastro-oesophageal reflux disease against 294 age- and sex-matched controls. Going to bed less than three hours after finishing dinner was associated with 7.45 times the odds of reflux disease, compared with waiting four hours or more.
That study was about evening meals, not olive oil, and a case-control design shows association rather than cause. But it lines up with standard advice: the NHS guidance on heartburn and acid reflux lists fatty foods among common triggers and advises not eating within three or four hours of bed. A neat tablespoon of oil is pure fat taken, by design, right before lying down.
So the people who should think twice about a bedtime spoonful are those with reflux or frequent heartburn, gallbladder problems, a condition affecting fat digestion, or a prescribed low-fat diet.
Weight and Inflammation: Why the Clock Doesn't Change the Arithmetic
A tablespoon of olive oil provides roughly 120 calories. Added at night to an unchanged day, that is around 840 extra calories a week. The research linking olive oil to healthier weight looks at it replacing other fats, not at a nightly addition — our article on drinking olive oil for weight loss covers that evidence.
The inflammation claim traces back to oleocanthal. In 2005, Beauchamp and colleagues reported in Nature that oleocanthal, the compound behind the peppery catch of fresh extra virgin oil, inhibits the same cyclooxygenase enzymes as ibuprofen in laboratory tests. That is a genuine mechanism, but it was observed in vitro and says nothing about an overnight effect from a spoonful. For the wider chemistry, see our guide to olive oil polyphenols.
If You Still Want an Evening Spoonful: How to Do It Sensibly
None of this is a reason to stop if you enjoy the ritual and it sits well. It is a reason to do it in a way that fits the evidence.
- Move it earlier. Take it with dinner or within the hour after, so there are two to three hours before you lie down.
- Start with a teaspoon. Build to a tablespoon only if it causes no heaviness, nausea or heartburn.
- Count it, don't add it. Use less butter or dressing elsewhere that day so the calories replace rather than stack.
- Choose extra virgin. The constipation trial found the grade of oil mattered; refined and "light" oils have lost most of their polyphenols.
- Lemon is optional. It changes the taste, not the evidence.
Neither morning nor night has been shown to be better, and the same oil poured over dinner counts just as much. For amounts across a day, our guide to how much olive oil per day sets out what the major studies used.
The Honest Objections
"People online say it transformed their sleep." Some probably do feel better, and a settled routine can help people wind down. But personal experience cannot separate the oil from the ritual or the other changes made at the same time. A trial would, and none has been run.
"Isn't this just refusing to admit olive oil is good for you?" No. Olive oil has one of the largest evidence bases of any dietary fat — see our article on olive oil and heart health. The point is narrower: the evidence belongs to the oil and the diet, not to the hour before bed.
"If timing doesn't matter, why not take it at night anyway?" For many people that is fine. The exception is anyone prone to reflux.
Why Sidr & Stone
If you take olive oil for what is in it rather than for the clock, the oil itself is the variable worth caring about — and the constipation trial above suggests the grade genuinely matters.
- Sidr & Stone's olive oil comes from one single estate — our own family-owned farm on the plains outside Marrakech, Morocco — with every step from tree to bottle under our control and no blending across origins.
- The grove is rain-fed, with no irrigation; the trees take what the season gives.
- It is organically grown, with no synthetic fertilisers, pesticides or herbicides; certification is in progress, as disclosed below.
- It is a limited single-harvest batch, picked when the fruit is ready and cold-pressed within hours of harvest to preserve flavour, aroma and polyphenols.
- It is unfiltered extra virgin olive oil, so natural sediment may settle — normal for an unfiltered oil.
- It is 100% natural: one ingredient, olive oil, nothing added.
- It comes in 500ml dark glass with a gold label, which helps protect the oil from light.
- Sidr & Stone gives 10% of profits to charity, with fulfilment in the UK, EU, and US.
We will not tell you Sidr & Stone is the best olive oil to take before bed — that is exactly the kind of claim this article warns against. What we will say is that our oil is single-estate Moroccan, rain-fed, organically grown and cold-pressed within hours of harvest. We have not yet published lab figures for polyphenols or acidity, so we make no claim about them.
Frequently Asked Questions
Is it good to take olive oil before bed?
For most healthy adults a tablespoon before bed is harmless, but no study shows bedtime adds any benefit over taking the same oil earlier in the day.
Does olive oil help you sleep?
No trial shows it does. Melatonin has been measured in extra virgin olive oil, and Mediterranean diets are associated with better sleep in observational studies, but neither shows a spoonful improves sleep.
How much olive oil should I take at night?
Start with a teaspoon and build to no more than a tablespoon. Count it within your day's fats rather than adding it on top.
Is it better to take olive oil in the morning or at night?
Neither has been shown to be better. Morning suits people prone to night-time heartburn; otherwise, consistency and oil quality matter more than the hour.
Will olive oil before bed help with constipation?
Joukar and colleagues' 2025 double-blind trial in 140 adults found two daily tablespoons of extra virgin olive oil eased chronic constipation more than refined oil over four weeks. It did not test bedtime.
Who should not take olive oil before bed?
People with reflux, gallbladder problems, conditions affecting fat digestion or a prescribed low-fat diet should avoid a bedtime dose or ask their GP first.
Where can I buy Sidr & Stone olive oil?
Our cold-pressed organic Marrakech olive oil is on pre-order from a limited single-harvest batch, with estimated shipping from November 2026 and fulfilment in the UK, EU, and US.
Is olive oil a medicine?
No. Olive oil is a food, not a medicine. It has a long traditional history — including being honoured in the Prophetic Sunnah — and a substantial body of modern research, particularly around polyphenols, cardiovascular health, and the Mediterranean diet pattern. It can be a worthwhile part of a healthy routine, but it does not cure diseases and is not a substitute for medical care. Be cautious of any olive oil marketed with specific disease-cure claims.
Final Thoughts
Olive oil before bed is a reasonable way to eat a good food, and an unreasonable thing to expect miracles from. The research supports olive oil itself — its grade, its place in a Mediterranean pattern, its role in regularity — and says nothing to suggest the hour before sleep is special.
If the ritual helps you, keep it, move it a little earlier, and choose an oil worth the calories. For what to look for on a label, see our guide to choosing a quality olive oil.
Our cold-pressed organic Marrakech olive oil — single-estate, rain-fed and pressed within hours of harvest — is available to pre-order from the current single-harvest batch, with fulfilment in the UK, EU, and US.
Our extra virgin olive oil is grown organically on our own single-estate farm on the plains outside Marrakech: we control every step from tree to bottle, and no synthetic pesticides, herbicides or fertilisers are used. It is not yet certified organic — certification is in progress, and we will publish it as soon as it comes through.
Pre-Order Sidr & Stone Organic Marrakech Olive Oil — Limited Single-Harvest Batch →
Disclaimer: This article explains published research on olive oil, sleep, constipation and reflux at the time of writing; research findings may change, and readers should check current sources. Olive oil is a food, not a medicine, and is not a substitute for medical treatment of any condition. For any health concern, consult a qualified medical professional.