Vitamin B6 Dream Recall: What the Trial Found, and the Dose Risk

01What the trial actually measured

The study behind almost every claim you will meet on this subject is Effects of Vitamin B6 (Pyridoxine) and a B Complex Preparation on Dreaming and Sleep, published in Perceptual and Motor Skills in 2018 by Denholm Aspy, Natasha Madden, and Paul Delfabbro. One hundred Australian adults aged 18 to 40 were randomly assigned to take 240 mg of pyridoxine hydrochloride, a B complex preparation, or a placebo immediately before bed for five nights in a row. Nobody, including the researchers, knew who had which. Every morning, participants filled in a diary about what they remembered.

The finding was specific. The B6 group reported significantly more dream content recalled than the placebo group. On vividness, bizarreness, colour, and the other sleep measures the study tracked, B6 made no significant difference. More of the dream came back, and the dream itself was not reported as any wilder than usual.

That precision is worth holding onto, because it is the first thing that goes missing when the result gets repeated. "B6 gives you insane dreams" is not what the trial found. "People wrote down more of what they had dreamt" is.

It is also fair to say why this study gets cited so often. Very few of the things sold for dreaming have ever been through a randomized, double-blind, placebo-controlled test at all, so a supplement with one real trial behind it stands out in a field that mostly runs on testimonials.

02Recall and vividness are two different measurements

The reason the two get blurred is partly that an earlier, much smaller study pointed somewhere slightly different. In 2002, Matthew Ebben, Anthony Lequerica, and Arthur Spielman published Effects of Pyridoxine on Dreaming: A Preliminary Study, also in Perceptual and Motor Skills. Twelve college students took 100 mg of B6, 250 mg of B6, and a placebo, each for five consecutive nights, in a counterbalanced order with a washout in between. Morning self-reports showed a significant difference on a dream salience score, a composite of vividness, bizarreness, emotionality, and colour, between the 250 mg condition and placebo across the first three days.

So the small 2002 study saw something on a measure that includes vividness, and the larger 2018 trial did not. Those are two separate studies, with different sample sizes, different doses, and different outcome measures, and the careful reading is that the recall finding is the better supported of the two while the vividness question is unsettled. You will sometimes see one figure or one dose attached to the wrong paper, which is a good reason to check what a page is actually citing before you act on it.

There is a plainer way to think about the distinction. Your brain produces dreams whether or not you remember them, which is the ground our explainer on why you forget your dreams covers in full. A measure of recall is a measure of what survived the trip to your notebook. A measure of vividness is a measure of what the dream was like. Something can shift the first without touching the second, and on the best evidence available, that is what B6 does.

03The number in the study and the number on the label

This is the part Google's own summary of the question leaves out, and it is the reason the page exists. The 240 mg used in the trial is not a normal supplement amount. It is a research amount, chosen for a five-night experiment, and comparing it against the standard reference points makes that obvious.

The NIH Office of Dietary Supplements puts the adult requirement at 1.3 mg a day, which most people meet from food without thinking about it. In 2023 the European Food Safety Authority published a reassessment of vitamin B6 safety that set an adult upper level of 12 mg a day, having reviewed the evidence on nerve damage. The United States has not moved from the Food and Nutrition Board's adult upper level of 100 mg a day. The trial dose sits above both.

None of that makes the study wrong. A short supervised experiment can use an amount that would be a poor idea to take nightly for months, and it did. What it means is that "a study used 240 mg" is not the same statement as "240 mg is a safe nightly dose", and the second claim has no evidence behind it at all.

04The signs that have nothing to do with dreaming

The documented risk from too much supplemental B6 is not a dream effect. It is peripheral sensory neuropathy: tingling, numbness, burning sensations, weakness, and problems with coordination and balance. The NIH Office of Dietary Supplements sets that out alongside the medicine interactions worth knowing about, including cycloserine, some antiseizure medicines, and theophylline. It is the reason EFSA lowered its adult upper level, and it is why a water-soluble vitamin that feels harmless is not automatically harmless in large amounts over time.

New tingling, numbness, burning, weakness, or unsteadiness while taking a supplement is not something to file under side effects of dreaming. It is a reason to stop and get medical advice promptly.

The person who can tell you whether any particular amount makes sense for you is a pharmacist or your prescriber, because they can see the rest of what you take and what you are being treated for. That is especially true if you are pregnant or breastfeeding, taking prescription medicines, or already managing neurological symptoms. It is a two-minute conversation at a pharmacy counter, and it is the step this whole question turns on.

05A B complex, food, and P-5-P are separate questions

It would be reasonable to assume that if B6 helps, a B complex containing B6 helps at least as much. The 2018 trial tested exactly that and found the opposite of a bonus: the B complex group showed no significant improvement in recalled dream content, and reported lower sleep quality than either B6 alone or placebo. More B vitamins did not mean more effect.

Food is a different question again, and it has not been tested. Both trials used high-dose supplements. There is no dream-recall study showing that eating more B6-rich food reproduces the result, and given the size of the gap between a dietary amount and a research amount, it would be surprising if it did.

P-5-P, or pyridoxal 5-phosphate, is the active form sold as a premium alternative, and the marketing for it often implies it is better or gentler for dreams. The cited trials tested pyridoxine hydrochloride. No dream-recall study has compared the two, so any claim that P-5-P works better or is safer for this purpose is running ahead of what anyone has measured.

06Where the popular version outruns the study

Three claims travel further than the evidence supports, and each one is worth naming.

The first is lucid dreaming. No controlled B6 study has shown an effect on becoming aware inside a dream. B6 turns up in supplement stacks marketed to lucid dreamers, but the induction research does not support supplements as reliable triggers, which our guide to how to lucid dream and what actually has evidence works through in detail.

The second is sleep. The 2018 trial found no significant benefit to reported sleep quality, and the B complex arm looked worse on it. Better recall is not a sleep improvement, and trading rest for dream material is a bad exchange.

The third is nightmares. Nothing establishes B6 as a treatment for them, and there is a consideration that runs the other way: if a supplement increases how much dream content you retain, distressing content is part of what you retain. If your nights already bring you difficult dreams, that is worth thinking about before you start, and our explainer on what nightmares are and what they mean is a better starting point than a bottle.

There is one more mix-up specific to this search. The most-watched clip many people meet when they look up B vitamins and dreams is a physician talking about thiamine, vitamin B1, and vivid dreams, which is a different vitamin from the one the dream-recall trials tested. The evidence described on this page is about B6 specifically.

Not everything circulating about B6 is overstated, either. One creator's accurate summary of the trial states the finding correctly, that the significant effect was on dream recall rather than on the dreams themselves. The same creator later posted a self-test in which B6 did not improve their recall. Both things can be true. A modest average difference across 100 people does not promise a difference for any one person on any one week, and a single person's five nights cannot overturn a controlled trial either.

07What reliably helps recall, at no cost and no risk

If the goal is to remember more of your dreams, the ordinary habits have more support behind them than any supplement, and they carry no safety limit. Enough sleep and a consistent schedule give you more of the morning REM period where the dreams you tend to remember happen. Waking gently rather than to a jolt helps. Staying still for a moment before you move, then writing or recording what is there before you check your phone, is the single practice that changes most people's results. Our full guide to how to remember your dreams sets out the routine, and if your dreams already come back loud and detailed, why some people's dreams are so vivid covers what drives that.

One honest complication is worth knowing if you plan to test a supplement on yourself. Keeping a diary at all improves recall, so starting a notebook and a bottle in the same week makes the two impossible to tell apart. If you want any chance of reading your own result, the diary comes first, on its own, for a couple of weeks. Our page on how long it takes before dream recall improves covers what a prospective diary study of 358 people found about that stretch.

08Common questions about vitamin B6 and dream recall

What are the signs of too much B6?

The documented sign of excess supplemental B6 is peripheral sensory neuropathy: tingling, numbness, burning sensations, muscle weakness, and problems with balance or coordination, usually starting in the hands and feet. These are nerve symptoms, not dream side effects. If they appear while you are taking a supplement, stop and speak with a clinician rather than waiting to see whether they pass.

Does vitamin B6 help you remember dreams?

In one randomized, double-blind, placebo-controlled trial of 100 adults, taking 240 mg before bed for five nights significantly increased the amount of dream content people reported recalling. That is a real result from a properly controlled study, and it is also a short one, based on morning self-reports in young adults, with no large independent long-term replication identified.

Does B6 make dreams more vivid?

Not in the 2018 trial, which found no significant effect on vividness, bizarreness, or colour. The much smaller 2002 study of 12 students did find a difference on a combined salience score at 250 mg, so the question is not fully settled, but the larger study is the better evidence and it separates recall from vividness clearly.

Is 100 mg of B6 safe every night?

The dream studies cannot answer that, because they ran for five nights and were not designed to test long-term safety. For context, 100 mg is the United States adult upper intake level and is more than eight times Europe's current adult upper level of 12 mg a day. Whether any amount is appropriate for you is a question for a pharmacist or prescriber who knows your medicines and history.

Does vitamin B6 cause lucid dreams?

No controlled trial has shown that. B6 appears in supplement stacks sold to lucid dreamers, but the studies behind it measured recalled dream content and related dream qualities, not lucidity. The methods with genuine support for inducing lucid dreams are behavioural and free.

Can vitamin B6 cause nightmares?

There is no evidence that B6 creates nightmares, and no evidence that it treats them. What can happen is simpler: if you recall more of your dream content, unpleasant content is part of what you recall. That is a reason to think about timing if you are already having difficult nights, not a reason to expect the supplement to generate them.

Whatever brought you here, the useful takeaway is a small one honestly stated: one good trial found that people wrote down more of their dreams, at an amount nobody has shown to be safe as a nightly habit. DreamTold treats dreams as a window into your own mind rather than something to be optimised, so if a dream you did manage to hold onto keeps returning to you, look up its images in the dream dictionary. This page is educational and meant for reflection, not medical advice. Take any question about supplements, doses, medicines, or new nerve symptoms to a pharmacist or a qualified clinician who can look at your whole situation.

09Sources

Every claim on this page that comes from somewhere else, with the somewhere else. Scripture and hadith are linked so you can read them in context rather than trusting a paraphrase.

• DOI: Effects of Pyridoxine on Dreaming: A Preliminary Study
• DOI: Effects of Vitamin B6 (Pyridoxine) and a B Complex Preparation on Dreaming and Sleep
• DOI: reassessment of vitamin B6 safety
• nationalacademies.org: Food and Nutrition Board's adult upper level of 100 mg a day
• ods.od.nih.gov: NIH Office of Dietary Supplements
• tiktok.com: a physician talking about thiamine, vitamin B1, and vivid dreams
• tiktok.com: accurate summary of the trial
• tiktok.com: self-test in which B6 did not improve their recall