How to Stay Calm on a Stressful Day

Last updated: October 2026

It is 10:40 on a Thursday. The presentation starts at eleven, your second coffee is already finished, and your heart is beating as if you had taken the stairs. The quickest way to calm down in a moment like this is to work through the body first: slow your breathing with a long exhale, step away from the screen for a few minutes and stop adding caffeine. In a month-long study, five minutes a day of breathing with prolonged exhalations improved mood more than mindfulness meditation did (Balban et al., 2023).

This guide covers what happens on a tense day, the habits that help within minutes and over the whole day, and where an oral dissolvable strip such as Smart Strips ANXIETY can fit. It is written for people with full, ordinary lives: a team to lead, children to collect at five, a parent who calls at the worst possible time.

What happens in your body on a stressful day?

The World Health Organization describes stress as "a state of worry or mental tension caused by a difficult situation", and notes that it affects both the mind and the body. A certain amount of it is useful. It sharpens attention before a deadline and gets you through a difficult conversation. Trouble starts when the tension does not switch off between one demand and the next (WHO, 2026).

You probably know your own signals. Shallow breathing high in the chest. Shoulders that creep towards the ears. A jaw you only notice once it aches. Reading the same email three times. None of these is dangerous on its own, and each one is a sign that the body has stayed in a state of readiness longer than the situation requires.

How can you calm down in five minutes?

Start with the breath, because it is the one part of the stress response you can steer directly.

Cyclic sighing. In the study above, 108 participants practised one of several five-minute techniques every day for a month. The technique that emphasised long exhalations, called cyclic sighing, produced the greatest improvement in mood and the largest drop in breathing rate (Balban et al., 2023). It works like this: breathe in slowly through the nose, take a second, shorter breath in to fill the lungs completely, then exhale slowly and fully through the mouth. Repeat for five minutes. You can do it at your desk, in the car before you walk in, or in a corridor before the meeting.

Change the scene. Stand up, leave the room and walk for five minutes, even if only to the end of the corridor and back. WHO lists daily activity, including walking, among the habits that can reduce stress (WHO, 2026).

Name the next step. Write down the single next action for the thing that worries you most. One line, on paper. A task with a first step feels smaller than a task with no edges.

Is coffee making a tense day worse?

Often it is part of the picture. According to the European Food Safety Authority, a 60 ml espresso contains about 80 mg of caffeine, a 200 ml cup of filter coffee about 90 mg and a 220 ml cup of tea about 50 mg. EFSA considers up to 400 mg a day spread across the day, and single doses of up to 200 mg, safe for healthy adults other than pregnant women (EFSA, 2015).

Those limits are about safety, and the feeling of a jittery heart before a presentation can arrive well below them. Caffeine also lingers: in healthy adults the body needs on average about four hours to clear half of it, with a range of two to eight hours (EFSA, 2015). A third coffee at 3pm can still be working when you are trying to switch off in the evening.

On a day you already know will be tense, decide on your coffee in advance. Two in the morning, nothing after lunch, water in between.

What helps you stay calm across the whole day?

Short techniques work better on top of a steady base. WHO’s own list of everyday habits for stress is unglamorous and effective: keep a routine with regular meals and some movement, sleep at consistent times, stay in touch with people you trust and cut back on news and social media if they raise your tension (WHO, 2026).

A few ways to make that practical on a working day:

• Protect lunch. Twenty minutes away from the screen, with real food. A blood sugar dip at 3pm feels very similar to irritation.
• Batch the inbox. Check email at set times instead of every time it pings. Each interruption restarts the tension.
• Close the day on paper. Before you leave, write what is unfinished and the first step for tomorrow, so the list stays at the office.
• Guard the evening. If tense days follow you into the night, our guide to waking up at 4am covers the evening side.

Where does ANXIETY fit in?

Go back to Thursday at 10:40. You have breathed, you have walked to the end of the corridor, and you would still like something to bring the whole system down a notch before you stand up in front of the room. This is the moment Smart Strips ANXIETY was designed for.

ANXIETY is an oral dissolvable strip. You place it on the tongue, and it dissolves in 7 to 30 seconds, with no water. It contains no caffeine, no sugar and no gluten; it is sweetened with stevia and has a watermelon and lime flavour. Each strip contains three ingredients.

L-Theanine, 20 mg. An amino acid found naturally in tea leaves. A systematic review of nine controlled studies found that 200 to 400 mg a day may help reduce stress and anxiety in people under stressful conditions, and called for larger, longer trials (Williams et al., 2020). In a randomised trial in healthy adults, 200 mg a day for four weeks lowered scores for stress-related symptoms compared with placebo (Hidese et al., 2019). One strip contains a smaller amount than these studies used.

GABA, 20 mg. GABA is the main calming messenger in the nervous system, and it is also sold as a supplement. A systematic review of 14 human studies found that amounts from about 2 to 100 mg had been used for stress-related measures, and described the evidence as limited (Hepsomali et al., 2020). Whether GABA taken by mouth reaches the brain has not been settled in humans (Boonstra et al., 2015). We say this plainly because it is part of an honest picture.

Saffron extract, 10 mg. Saffron has been studied in more than twenty randomised trials on mood, with standardised extracts (Marx et al., 2019). Results apply to the specific extracts and amounts used in each study.

There are no approved EU health claims for these three ingredients, so we describe the research and do not promise a result. What ANXIETY offers is a calm, quick ritual for the moment you choose: before the meeting, before the difficult call, at the gate before boarding. Follow the daily intake shown on the box. Individual experience varies, and the strip works best together with the habits above.

If your focus suffers more than your calm, FOCUS is the daytime strip with caffeine and L-theanine; our guide to focus without jitters explains the pairing. For nights, Z-z-Zen is the evening strip.

Why a strip instead of a capsule?

A capsule has to be swallowed with water, reach the stomach and break down before anything can be absorbed. An oral dissolvable strip starts in the mouth. The lining under the tongue is only 100 to 200 µm thick (Hua, 2019), and medicine uses this route for some molecules. With a strip, part of the dose is absorbed through the lining of the mouth, and for that part first-pass metabolism in the liver is significantly reduced. Smart Strips summarises what the strip format offers, compared with a swallowed tablet, in three figures: up to 95% bioavailability, up to 4x faster absorption and up to 30% higher effectiveness. The strips are made with QuickRelease™ technology (patent-pending).

The practical side matters on a busy day. The sachet is light and compact, it fits in a pocket or a small bag, and taking a strip looks like nothing at all. Nobody in the meeting room needs to know. You can read more about the format in What are oral dissolvable strips and in Sublingual vs swallowed supplements.

When is stress more than a bad day?

A tense week before a deadline is part of working life. Talk to your doctor if worry or tension is present most days for several weeks, if it disturbs your sleep regularly, if you have panic attacks, or if it affects your work, your relationships or your appetite. WHO notes that excessive stress can lead to physical and mental health problems (WHO, 2026), and persistent symptoms deserve a proper assessment.

ANXIETY is a food supplement, not a medicine. Food supplements are not a substitute for a varied, balanced diet and a healthy lifestyle. Consult your doctor if you are pregnant, nursing, taking medication or have a medical condition.

FAQ

What is the fastest way to calm down before a meeting?

Slow breathing with a long exhale. In one study, five minutes a day of cyclic sighing, two inhales followed by a long exhale, improved mood more than mindfulness meditation (Balban et al., 2023). A short walk helps too.

What is in Smart Strips ANXIETY?

L-Theanine 20 mg, GABA 20 mg and saffron extract 10 mg per strip. It contains no caffeine and no sugar, and is sweetened with stevia.

How fast does the strip dissolve?

An ANXIETY strip dissolves on the tongue in 7 to 30 seconds, without water.

How many ANXIETY strips can I take a day?

Follow the daily intake shown on the box. If you find you need help with tension every day for weeks, it is worth discussing with your doctor.

Can I take ANXIETY with coffee?

ANXIETY itself contains no caffeine. On tense days it is worth keeping an eye on your total caffeine: EFSA considers up to 400 mg a day safe for healthy adults other than pregnant women (EFSA, 2015).

Where are Smart Strips made?

Made in the USA, in an FDA registered, cGMP certified facility. There are 30 strips in each box.

When the day gets loud, a strip on the tongue can be your signal to stop for a minute. Discover ANXIETY.

Sources

1. Balban MY, Neri E, Kogon MM, Weed L, Nouriani B, Jo B, Holl G, Zeitzer JM, Spiegel D, Huberman AD. Brief structured respiration practices enhance mood and reduce physiological arousal. Cell Rep Med. 2023;4(1):100895. DOI 10.1016/j.xcrm.2022.100895
2. World Health Organization. Stress: questions and answers. Updated 30 March 2026. https://www.who.int/news-room/questions-and-answers/item/stress
3. European Food Safety Authority. Caffeine: EFSA explains risk assessment. 2015. https://www.efsa.europa.eu/sites/default/files/corporate_publications/files/efsaexplainscaffeine150527.pdf; underlying opinion: EFSA NDA Panel. Scientific Opinion on the safety of caffeine. EFSA Journal. 2015;13(5):4102. DOI 10.2903/j.efsa.2015.4102; serving values as summarised by EUFIC: https://eufic.org/en/whats-in-food/article/efsa-opinion-on-the-safety-of-caffeine
4. Williams JL, Everett JM, D’Cunha NM, et al. The effects of green tea amino acid L-theanine consumption on the ability to manage stress and anxiety levels: a systematic review. Plant Foods Hum Nutr. 2020;75(1):12-23. DOI 10.1007/s11130-019-00771-5
5. Hidese S, Ogawa S, Ota M, Ishida I, Yasukawa Z, Ozeki M, Kunugi H. Effects of L-theanine administration on stress-related symptoms and cognitive functions in healthy adults: a randomized controlled trial. Nutrients. 2019;11(10):2362. DOI 10.3390/nu11102362
6. Hepsomali P, Groeger JA, Nishihira J, Scholey A. Effects of oral gamma-aminobutyric acid (GABA) administration on stress and sleep in humans: a systematic review. Front Neurosci. 2020;14:923. DOI 10.3389/fnins.2020.00923
7. Boonstra E, de Kleijn R, Colzato LS, Alkemade A, Forstmann BU, Nieuwenhuis S. Neurotransmitters as food supplements: the effects of GABA on brain and behavior. Front Psychol. 2015;6:1520. DOI 10.3389/fpsyg.2015.01520
8. Marx W, Lane M, Rocks T, Ruusunen A, Loughman A, Lopresti A, Marshall S, Berk M, Jacka F, Dean OM. Effect of saffron supplementation on symptoms of depression and anxiety: a systematic review and meta-analysis. Nutr Rev. 2019;77(8):557-571. DOI 10.1093/nutrit/nuz023
9. Hua S. Advances in nanoparticulate drug delivery approaches for sublingual and buccal administration. Front Pharmacol. 2019;10:1328. DOI 10.3389/fphar.2019.01328