How do you swap a two-energy-drink-a-day habit for a better routine?

Last updated October 2026

Same gas station, same cooler, same can, same time every afternoon. Maybe a second one on the drive home. You have told yourself you will cut back, and some days you do. Then a Tuesday happens.

That is not a willpower problem. It is how habits work. The research on habits is surprisingly practical, and it points to a clear approach: do not just try to stop. Build something to do instead.

Why is it so hard to stop a daily energy drink habit?

Because a habit runs on cues, not decisions. Psychologists Wendy Wood and David Neal describe habits as associations your brain learns between an action and the context it happens in, such as a physical setting or the thing you just did. Once that link forms, "perception of contexts triggers the associated response without a mediating goal" [1]. You see the cooler, and your hand already knows what to do.

Those links are also stubborn. In their review, Wood and Neal describe habit associations that "do not shift appreciably with current goal states or infrequent counterhabitual responses" [1]. Wanting to change, or skipping it once, does not rewire much on its own. Old habits can also come back when motivation dips or when you return to a familiar setting [2].

Is it easier to replace a habit than to quit it?

Yes, according to habit researchers. Benjamin Gardner, Phillippa Lally and Jane Wardle put it bluntly: people should pick a new behavior "rather than give up an existing behaviour... because it is not possible to form a habit for not doing something" [3]. Breaking an existing habit, they add, takes "different and altogether more effortful strategies than making new habits" [3].

So "no more energy drinks" is a hard plan to stick to. "When I hit my afternoon slump, I do this instead" gives your brain something to learn.

What is an if-then plan, and does it work?

An if-then plan, which researchers call an implementation intention, ties a specific action to a specific situation: "If it is 3PM and I am at my desk, then I will..." A meta-analysis of 94 tests found these plans had a "medium-to-large" positive effect on reaching goals [4].

They may help against an existing habit too. In a set of lab experiments, if-then plans that named a replacement response changed which response came to mind first in the critical situation, with one catch: behavior shifted only "to the extent that individuals have strong alternative goal intentions" [5]. So pick a swap you actually like.

A few ways to write one:

• If I stop for gas, then I buy a water instead of a can.
• If it is 3PM, then I take a 10-minute walk outside.
• If I want caffeine, then I choose something with a dose I can count and no added sugar, and I have it before mid-afternoon.

Does habit stacking actually work?

The idea behind it has support. The branded technique has not been tested much. "Habit stacking," attaching a new habit to one you already have, is a popular self-help term, and we did not find a peer-reviewed trial of it by name. The closest evidence is a small exploratory study of 50 people: those who flossed after brushing their teeth, rather than before, tended to form stronger flossing habits, and at eight months had stronger habits and flossed more often [6]. Gardner, Lally and Wardle also recommend using "a cue located within an existing daily routine" as the starting point for a new habit [3].

How long does it take for a new routine to feel automatic?

Longer than 21 days, and it varies a lot. Habit researchers call the "21 days" figure a myth, tracing it to anecdotes rather than research [3]. In the best-known real-world study, which followed people for 84 days, researchers estimated it would take between 18 and 254 days for people to get 95% of the way to their peak automaticity for a new daily behavior. That estimate covered the participants whose data fit the model well, so the longer end is a projection [7]. The typical figure was about 66 days [3]. Simple actions became automatic faster than complicated ones [3].

The encouraging part: "missing one opportunity to perform the behaviour did not materially affect the habit formation process" [7]. One bad Tuesday does not reset the clock.

How much sugar and caffeine is in a typical energy drink?

More than most people guess, and it varies widely by brand.

• Sugar. A single 16 oz regular energy drink can have 54 to 62 grams of added sugar, according to the National Center for Complementary and Integrative Health [8]. The American Heart Association recommends no more than 25 grams of added sugar a day for women and 36 grams for men [9]. Sugar-free versions exist, so check the label.
• Caffeine. The FDA says energy drinks generally have 54 to 328 mg of caffeine per 16 oz [10]. That spread means two cans could be a modest amount of caffeine or well over the FDA's daily reference figure.
• Coffee is not much more predictable. A lab analysis of coffee-shop drinks found caffeine from 58 to 259 mg per serving, and the same drink from the same shop ranged from 259 to 564 mg over six days [11].

For reference, the FDA cites 400 mg a day as an amount "not generally associated with negative effects" for most adults [10]. Counting is hard when your sources vary this much.

This is the one place we will talk about our own product. LSC100 has 100 mg of caffeine from green coffee extract, 100 mg of L-theanine and 0 g of added sugar in every lozenge. If caffeine stays part of your afternoon, a fixed, labeled dose makes the counting easy. It is still caffeine, so everything below about cutting back applies to it too. And if your can is a 3PM habit, think about moving caffeine earlier as well; caffeine late in the day can cost you sleep.

What happens when you cut back on caffeine?

You may feel worse for a few days, and that is normal. A review of 66 studies on caffeine withdrawal found symptoms usually start 12 to 24 hours after your last dose, peak between 20 and 51 hours, and last 2 to 9 days. They include headache, fatigue, low energy, trouble concentrating and irritability. Headache showed up in about half of people in experimental studies, and symptoms appeared even in people used to as little as 100 mg a day [12].

Mayo Clinic notes that "most often, these symptoms are mild and get better after a few days" [13].

Should you cut back gradually or all at once?

The standard advice is gradually, though the evidence for it is thinner than you might expect. The FDA says that if you want to cut back, "it's best to do so gradually" [10]. Mayo Clinic suggests going "little by little," for example "one fewer can of soda or... a smaller cup of coffee each day," so that "withdrawal effects may be less" [13]. In 2004, the leading withdrawal researchers noted that the effect of gradual reduction on symptoms still needed to be studied properly [12], and we did not find a trial comparing tapering with stopping cold.

If you are cutting back a lot, or you have a health condition, talk to your doctor about a plan that fits you.

Who should be careful with caffeine?

• Pregnant or breastfeeding: in pregnancy, ACOG says less than 200 mg a day does not appear to be a major factor in miscarriage or preterm birth [14]. Talk to your provider about breastfeeding too.
• Teens and kids: the American Academy of Pediatrics says the caffeine and other stimulants in energy drinks "have no place in the diet of children and adolescents" [15].
• Heart or blood pressure concerns: large amounts of caffeine may cause heart rhythm problems and raise heart rate and blood pressure [8].
• Drinking alcohol: the CDC warns that caffeine "does not reduce the effects of alcohol on your body," even if you feel more alert [16]. Do not mix them.
• Taking medication: ask your doctor or pharmacist.

What to check, in order

1. Notice your cue: the time, place or action that comes right before the can.
2. Pick a replacement you actually want, not just an absence.
3. Write it as an if-then plan.
4. Read the labels on what you drink now, for both caffeine and added sugar.
5. If you are cutting caffeine, go gradually and expect a few rough days.
6. Give it weeks, not days, and do not quit after one miss.

FAQ

Is caffeine withdrawal dangerous?

The FDA says caffeine withdrawal "isn't considered dangerous but can be unpleasant" [10]. If you have severe symptoms, talk to a doctor.

Do I need to quit caffeine completely?

Not necessarily. For most adults, the FDA cites 400 mg a day as an amount not generally associated with negative effects [10]. Many people simply want a routine with less sugar, a known dose, or caffeine earlier in the day.

What if I miss a day of my new routine?

Keep going. In the main habit-formation study, missing one day did not materially affect how the habit formed [7].

This article is for general information only and is not medical advice. LSC100 is not intended to diagnose, treat, cure or prevent any disease. Talk to your doctor before using caffeine if you are pregnant or nursing, have a medical condition, or take medication. Not intended for anyone under 18.

Sources

1. Wood W, Neal DT. "A new look at habits and the habit-goal interface." Psychological Review, 2007. Theory review. https://pubmed.ncbi.nlm.nih.gov/17907866/ Theory review: habits are triggered by context cues and do not shift easily with goals.
2. Gardner B, et al. "Breaking habits or breaking habitual behaviours? Old habits as a neglected factor in weight loss maintenance." Appetite, 2021. Narrative review. https://pubmed.ncbi.nlm.nih.gov/33651994/ Old habit associations can cause lapses when motivation dips or in familiar settings.
3. Gardner B, Lally P, Wardle J. "Making health habitual: the psychology of 'habit-formation' and general practice." British Journal of General Practice, 2012. https://europepmc.org/articles/PMC3505409 You cannot form a habit of not doing something; anchor to an existing routine; the 21-day myth; an average plateau of about 66 days.
4. Gollwitzer PM, Sheeran P. "Implementation Intentions and Goal Achievement: A Meta-analysis of Effects and Processes." Advances in Experimental Social Psychology, 2006. 94 tests. https://www.sciencedirect.com/science/article/abs/pii/S0065260106380021 If-then plans had a medium-to-large effect on goal attainment.
5. Adriaanse MA, et al. "Breaking habits with implementation intentions: a test of underlying processes." Personality and Social Psychology Bulletin, 2011. Three experiments. https://pubmed.ncbi.nlm.nih.gov/21317315/ If-then plans naming a replacement shifted habitual responses in lab tasks, when people wanted the alternative.
6. Judah G, Gardner B, Aunger R. "Forming a flossing habit: an exploratory study of the psychological determinants of habit formation." British Journal of Health Psychology, 2013. n=50. https://pubmed.ncbi.nlm.nih.gov/22989272/ Flossing after brushing built stronger habits at 8 months.
7. Lally P, et al. "How are habits formed: Modelling habit formation in the real world." European Journal of Social Psychology, 2010. Longitudinal study over 84 days, 96 recruited, 82 analysed, model fitted well for 39. https://doi.org/10.1002/ejsp.674 Modeled 18 to 254 days to reach 95% of peak automaticity; missing one day did not derail it.
8. National Center for Complementary and Integrative Health. "Energy Drinks." Last updated July 2018. https://www.nccih.nih.gov/health/energy-drinks 54 to 62 g added sugar per 16 oz energy drink; heart and blood pressure effects of large caffeine amounts.
9. American Heart Association. "How Much Sugar Is Too Much?" Last reviewed May 14, 2026. https://www.heart.org/en/healthy-living/healthy-eating/eat-smart/sugar/how-much-sugar-is-too-much Added sugar limits of 25 g for women and 36 g for men.
10. U.S. Food and Drug Administration. "Spilling the Beans: How Much Caffeine is Too Much?" Content current as of August 28, 2024. https://www.fda.gov/consumers/consumer-updates/spilling-beans-how-much-caffeine-too-much Energy drinks have 54 to 328 mg per 16 oz; 400 mg a day for most adults; cut back gradually; withdrawal is not considered dangerous.
11. McCusker RR, Goldberger BA, Cone EJ. "Caffeine content of specialty coffees." Journal of Analytical Toxicology, 2003. https://pubmed.ncbi.nlm.nih.gov/14607010/ 58 to 259 mg per serving; the same drink varied from 259 to 564 mg over six days.
12. Juliano LM, Griffiths RR. "A critical review of caffeine withdrawal: empirical validation of symptoms and signs, incidence, severity, and associated features." Psychopharmacology, 2004. Review of 57 experimental and 9 survey studies. https://pubmed.ncbi.nlm.nih.gov/15448977/ Withdrawal onset, peak, duration and symptoms; occurs at 100 mg a day; gradual reduction needs more study.
13. Mayo Clinic Staff. "Caffeine: How much is too much?" February 21, 2025. https://www.mayoclinic.org/healthy-lifestyle/nutrition-and-healthy-eating/in-depth/caffeine/art-20045678 Cut back little by little; withdrawal symptoms are usually mild.
14. American College of Obstetricians and Gynecologists. "Moderate Caffeine Consumption During Pregnancy." Committee Opinion, reaffirmed 2026. https://www.acog.org/clinical/clinical-guidance/committee-opinion/articles/2010/08/moderate-caffeine-consumption-during-pregnancy Less than 200 mg a day in pregnancy.
15. American Academy of Pediatrics. "Sports drinks and energy drinks for children and adolescents: are they appropriate?" Pediatrics, 2011. https://pubmed.ncbi.nlm.nih.gov/21624882/ Energy drink stimulants have no place in children's and teens' diets.
16. Centers for Disease Control and Prevention. "Effects of Mixing Alcohol and Caffeine." Updated May 15, 2024. https://www.cdc.gov/alcohol/about-alcohol-use/alcohol-caffeine.html Caffeine does not reduce alcohol's effects.