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Ingredient guide

Best time to take lemon balm

Written by the Full Measure editorial team, which sells supplements. Approved for publication by the Full Measure owners. Updated .

Drafted with AI assistance from the sources listed below. How we write these

Quick answer

In the sleep trials, people took lemon balm in the evening, 30 minutes before bed, or split it between morning and evening. Mood studies gave single daytime doses and measured effects over 1 to 6 hours. Food moved the peak in the blood from about 1 hour after a dose to about 3 hours.1,2,3,4

Key facts

  • Both placebo-controlled sleep trials used 400 mg a day, one as a single evening dose and one as two doses of 200 mg.1,5
  • After a meal, rosmarinic acid from lemon balm reached the blood more slowly but in a larger total amount.4
  • The highest single dose of one extract lowered alertness for the full six hours measured.3
  • None of the trials we read compared a morning dose with an evening dose.1,2,5

For sleep: in the evening

In the crossover sleep trial, people took the extract every evening, 30 minutes before going to bed.1

The open trial split the daily amount into a morning dose and an evening dose taken before sleep.2

The three-week trial gave 200 mg twice a day without stating the hours. Evening use for sleep follows how these trials were designed, not a test of one time against another.5

During the day

Single-dose mood studies took their measurements from 1 hour to 6 hours after the dose.3,6,7

May increase feelings of calm for a few hours after a single dose*3,6,7,8

Early evidence

Three small crossover trials from one UK group gave healthy young adults single doses and tracked mood for up to 6 hours. Self-rated calmness rose after 300 mg of one extract and after 1,600 mg of dried leaf, and 600 mg lessened the drop in mood caused by a stressful multitasking test in 18 people. Some doses slowed memory tasks or lowered alertness. In a larger 2026 trial of 106 stressed young adults, 300 mg did not change overall calmness, the main outcome, though calm returned faster after demanding tasks.

Amount studied: Single doses of 300 to 1,600 mg, depending on the product

In the stress study, people took 300 mg or 600 mg and began a 20-minute stressful task an hour later. In the 2026 trial, scores on the hardest attention tasks differed at 5 hours, after repeated demanding sessions, and calm recovered faster after those sessions.7,8

With or without food

Rosmarinic acid from lemon balm peaked in the blood about 1 hour after a dose taken on an empty stomach. Taken 30 minutes after a meal, it peaked at about 3 hours, and total exposure was higher.4

So a dose with dinner peaks later than one on an empty stomach, which may matter if you take it close to bedtime. The study measured blood levels in 11 people, not sleep or mood, so it cannot say which way works better.4

Drops, tinctures and teas

We found no trial of lemon balm drops, tincture or tea, so there is no studied timing for them. The trials used tablets or capsules of specific extracts or dried leaf, and different preparations of the plant can act differently.5,6

When to be careful

In single-dose studies, the highest dose of one extract lowered alertness for several hours, and some doses slowed timed memory tasks.3,6

Try a new product or a larger dose at a time when you will not need to drive or work with machinery. Ask before taking lemon balm in the evening alongside sedatives or sleep medicines.3

What's in ours

What’s in ours

  • Sleep: Lemon Balm Extract, 100 mg per serving, from the label

Questions people ask

Should I take lemon balm in the morning or at night?

For sleep, the trials gave it in the evening, or split between morning and evening. For calm during the day, studies gave a single daytime dose. No trial compared the two directly.1,2,8

Is it better to take lemon balm with food?

In one small study, food delayed the peak in the blood by about 2 hours but raised the total amount absorbed. No study has tested whether that changes how well it works.4

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Sources

  1. Di Pierro F, Sisti D, Rocchi M, et al. Effects of Melissa officinalis Phytosome on Sleep Quality: Results of a Prospective, Double-Blind, Placebo-Controlled, and Cross-Over Study. Nutrients. 2024;16(23):4199. Opened 2026-10-07.
  2. Cases J, Ibarra A, Feuillère N, Roller M, Sukkar SG. Pilot trial of Melissa officinalis L. leaf extract in the treatment of volunteers suffering from mild-to-moderate anxiety disorders and sleep disturbances. Med J Nutrition Metab. 2011;4(3):211-218. Opened 2026-10-07.
  3. Kennedy DO, Scholey AB, Tildesley NT, Perry EK, Wesnes KA. Modulation of mood and cognitive performance following acute administration of Melissa officinalis (lemon balm). Pharmacol Biochem Behav. 2002;72(4):953-964. Opened 2026-10-07.
  4. Noguchi-Shinohara M, Ono K, Hamaguchi T, et al. Pharmacokinetics, Safety and Tolerability of Melissa officinalis Extract which Contained Rosmarinic Acid in Healthy Individuals: A Randomized Controlled Trial. PLoS One. 2015;10(5):e0126422. Opened 2026-10-07.
  5. Bano A, Hepsomali P, Rabbani F, et al. The possible calming effect of subchronic supplementation of a standardised phospholipid carrier-based Melissa officinalis L. extract in healthy adults with emotional distress and poor sleep conditions: results from a prospective, randomised, double-blinded, placebo-controlled clinical trial. Front Pharmacol. 2023;14:1250560. Opened 2026-10-07.
  6. Kennedy DO, Wake G, Savelev S, et al. Modulation of mood and cognitive performance following acute administration of single doses of Melissa officinalis (lemon balm) with human CNS nicotinic and muscarinic receptor-binding properties. Neuropsychopharmacology. 2003;28(10):1871-1881. Opened 2026-10-07.
  7. Mathews I, Eastwood J, Bell L, et al. The acute effects of Zensera (Melissa officinalis L.) extract on mood and cognitive performance during cognitive overload: a randomised placebo-controlled, double-blind study in healthy young adults with moderate subjective stress. Ther Adv Psychopharmacol. 2026;16:20451253261415706. Opened 2026-10-07.
  8. Kennedy DO, Little W, Scholey AB. Attenuation of laboratory-induced stress in humans after acute administration of Melissa officinalis (lemon balm). Psychosom Med. 2004;66(4):607-613. Opened 2026-10-07.

*These statements have not been evaluated by the Food and Drug Administration. This product is not intended to diagnose, treat, cure, or prevent any disease.

This page is information, not medical advice. Talk to your doctor or pharmacist about your own situation.