Can I take vitamin D and omega-3 at night?

Yes at the evening meal, and the two vitamin-D-and-sleep stories graded, the first one first

Can I take vitamin D and omega-3 at night is answered yes at the evening meal, where the fish oil's fat and the meal's carry the fat-soluble vitamin D, the fat-soluble shelf's rule, and the question usually hides one of two stories about vitamin D and sleep, both of which deserve grading because they pull in opposite directions and neither is strong enough to move a tablet. Story one, that evening vitamin D disturbs sleep: the theory runs that vitamin D and melatonin are linked, vitamin D being made in sunlight and melatonin in darkness, so that a dose of vitamin D at night tells the body it is daytime and suppresses the melatonin rise sleep needs, and the evidence for it is a handful of observational reports and anecdotes from readers who took vitamin D at bedtime and slept badly, with no controlled trial showing that evening vitamin D worsens sleep, the vitamin D and sleep literature finding no such effect when it has looked, so story one is a plausible-sounding theory with thin support and a reader who sleeps well after evening vitamin D has no reason to move it. The honest mechanism note is that vitamin D is a stored, slow-acting vitamin whose blood level changes over weeks, not a signal that arrives with a tablet, which is why a single evening dose has no acute action on melatonin to have.

The second story graded, the fish oil's own night rule, the plate that settles both, and the pair filed

Story two, that vitamin D helps sleep: the evidence runs the other way from story one and is also thin, low vitamin D status associating with poorer sleep quality and shorter sleep in observational studies, a few small trials reporting modest sleep improvements with vitamin D in people who were deficient, and no authorised sleep claim for vitamin D, whose register sentences are bones, teeth, muscle function, immune function, calcium absorption and cell division, the vitamin D pages' finding that a deficient reader corrected through the winter may sleep a little better as one of several things that improve and a replete reader gains nothing for sleep from more, and a reader who takes vitamin D at night for sleep has taken a stored vitamin for an acute reason it cannot serve, the same shape as the magnesium-for-sleep belief. Neither story moves the tablet: the tablet goes where the fat is, and for most lifters the fat is at dinner, so vitamin D at night means vitamin D with the evening meal and is fine on both stories. The fish oil's own night rule is firmer than either story: with food, since an ethyl ester oil absorbs several-fold better with fat, and with an upright hour or two after, since any oil swallowed fasted and followed by lying flat refluxes, the reflux-and-posture literature's finding, so vitamin D and omega-3 at night means the pair at the evening meal and never a softgel and a tablet at the pillow, where the fish oil refluxes and the vitamin D goes down with no fat to carry it. The dose is the UK winter's 10 micrograms a day from October to March and year-round for those who get little sun, with 100 micrograms the upper level. The pair filed: vitamin D and omega-3 at night is fine at the evening meal, the two sleep stories both graded thin and neither moving the tablet from the fat, the fish oil's rule of food and an upright hour holding, and the worked example being the fish oil that carries the vitamin D at the plate, one softgel at 17p, £14.99 for 90.

The verdict, fine at the evening meal, with two sleep stories that cancel each other and neither counting

Can I take vitamin D and omega-3 at night: yes at the evening meal, where the fish oil's fat and the meal's carry the vitamin D, with the two stories that attach to vitamin D and night both graded thin, the story that evening vitamin D suppresses melatonin and disturbs sleep having a theory and no controlled trial, and the story that vitamin D helps sleep having an association in the deficient and small mixed trials with no claim, neither moving the tablet from the fat, and the fish oil's own night rule holding firmer than either, food and an upright hour rather than a fasted softgel at the pillow. The fish oil that carries the vitamin D at the plate: Futuro Labs Omega 3 Fish Oil, one softgel with the evening meal, 180mg EPA and 120mg DHA, 90 for £14.99 at 17p a day, with 10 micrograms of vitamin D beside it through the winter.

What to check on the label

Questions people also ask

Does taking vitamin D at night affect sleep?

Not on any controlled evidence: the theory that evening vitamin D suppresses melatonin rests on observational hints and anecdotes, vitamin D is a stored, slow-acting vitamin whose blood level changes over weeks rather than a signal that arrives with a tablet, and a reader who sleeps well after evening vitamin D has no reason to move it.

Does vitamin D help you sleep?

Not as a claim: low vitamin D status associates with poorer sleep in observational studies and a few small trials report modest improvements in people who were deficient, but no sleep claim is authorised and a replete reader gains nothing for sleep from more.

Is it okay to take fish oil and vitamin D together before bed?

At the evening meal, yes; at the pillow, no: a fasted softgel refluxes as you lie flat and an ethyl ester oil absorbs poorly without fat, while the vitamin D goes down with no fat to carry it, so the pair belongs to the plate and an upright hour after it.

When is the best time to take vitamin D and omega-3?

Whichever meal has fat and is never forgotten, the evening meal for most lifters, since both are fat-soluble, neither has a clock of its own, and the fish oil softgel itself supplies part of the fat the vitamin D needs.

How much vitamin D should I take with omega-3?

The UK advice: 10 micrograms a day from October to March for all adults and year-round for those with dark skin, who cover up or who rarely go outside, with 100 micrograms a day the adult upper level and a GP's deficiency dose the one exception.

Sources

1. The vitamin D and sleep literature: low vitamin D status associates with poorer sleep in observational studies, with supplementation trials small and inconsistent and no authorised claim. PubMed record
2. The vitamin D absorption literature: vitamin D is fat-soluble and its absorption from supplements is improved when taken with a meal containing fat. PubMed record
3. The reflux and posture literature: lying flat within an hour or two of eating, and of taking an oil, increases reflux because the stomach's contents sit against the oesophageal junction, so a fish oil softgel taken at the pillow refluxes more than the same softgel taken with an upright meal. PubMed record
4. SACN report on vitamin D and health: the basis of UK government advice that adults consider a 10 microgram vitamin D supplement, particularly through autumn and winter. https://www.gov.uk/government/publications/sacn-vitamin-d-and-health-report

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