7 reasons why more and more people are fasting this summer and what happens in the body
Energy, digestion, skin: Why a juice cleanse works especially well in the summer and what actually happens in your body during the fasting days.
Energy, digestion, skin: Why a juice cleanse works especially well in the summer and what actually happens in your body during the fasting days.
1. Because your digestion deserves a break
Most of us eat too often. Breakfast at seven, a snack at eleven, lunch with colleagues, something sweet with coffee, and dinner in the evening. The consequences are often dismissed as a "sensitive stomach": bloating in the evening, a feeling of fullness after meals. Yet digestion is not a side process. It is one of the most demanding tasks your body performs every day. The problem is rarely the gut. It is the lack of a break.
WHAT HAPPENS IN THE BODY
The intestine has its own cleaning program: the Migrating Motor Complex. Wave-like contractions push food residue and bacteria from the stomach toward the large intestine—a type of broom for the small intestine that cycles through every 90 to 120 minutes. The crucial part: It only operates in a fasting state and is interrupted immediately by any intake of food. In a daily routine with six eating occasions, it practically never completes its cycle.
Source: Deloose et al., Nature Reviews Gastroenterology & Hepatology, 2012
HOW A JUICE CLEANSE HELPS
A break only works if it is long enough – an evening without a snack isn't enough for that. A juice cleanse relieves the digestive tract of exactly the part that requires the most work: solid fiber structures, fat, protein, and large portions. What follows is liquid, in defined portions and with hours in between.
2. Because your energy doesn't come from your third coffee
In 2016, the Nobel Prize in Medicine went to a Japanese cell biologist who had spent decades watching yeast cells starve. Yoshinori Ohsumi had deciphered what cells do when no more nutrients arrive: they begin to recycle themselves. Research calls this autophagy. Literally translated: eating oneself. And that is exactly the reason why fasting has appeared in every second longevity podcast for the past ten years.
WHAT HAPPENS IN THE BODY
After about 10 to 14 hours without food intake, the liver's glycogen stores are largely depleted. The body shifts: fatty acids are released and converted in the liver into ketone bodies, an alternative fuel for cells and the brain that provides them with a much steadier energy supply. In technical literature, this point is called the "metabolic switch."
Source: de Cabo & Mattson, The New England Journal of Medicine, 2019
HOW THE JUICE CLEANSE HELPS
A juice cleanse is not water fasting. It provides carbohydrates, which dampens ketosis compared to zero-calorie fasting. What it does provide very reliably, however, is almost no protein. And that specific amino acid signal is the stimulus to which cells react most clearly. Added to this is the practical side – no dinner to reset the clock to zero. Those looking for the maximum version should opt for water fasting. However, one should not do this alone, and it is not very practical for daily life with obligations like work and family.
3. Because glow comes from within
Skincare routines are becoming more elaborate every year. Serums, acids, LED masks. What often gets lost in the process: part of what we perceive as "healthy skin" does not originate on the skin, but reaches it through what we eat.
WHAT HAPPENS IN THE BODY
The gut and skin are in constant communication via immune cells, messenger substances, and metabolic products of gut bacteria. Researchers call this the gut-skin axis. A gut microbiome that is out of balance is linked to inflammatory skin conditions in review articles. The exact mechanisms are not yet fully understood – the connection itself is now considered well-substantiated.
Source: Mahmud et al., Gut Microbes, 2022
HOW THE JUICE CLEANSE HELPS
Two levers at the same time. From the inside, things that are regularly mentioned in literature in connection with inflammatory skin conditions are eliminated for a few days: high blood sugar spikes, alcohol, and highly processed foods. Instead, plant compounds from vegetables and fluids are provided in reliable amounts. From the outside, the cleansing activated charcoal mask is part of the cleanse – less because a mask fundamentally changes the skin, but because twenty minutes of self-care is the first thing to be cut from daily life.
4. As a conscious break for body and mind
For millennia, fasting has been firmly anchored in the calendar of almost every culture. Not as a health measure, but as a rhythm: phases with, and phases without. Lent, Ramadan, the weeks before the harvest. What these periods had in common was not so much the abstinence as the timing—a set period during which things were done differently than usual. It is precisely this time-out that has disappeared from our everyday lives.
WHAT HAPPENS IN THE BODY
After about 10 to 14 hours without food intake, the liver's glycogen stores are largely depleted. The body switches gears: fatty acids are released from adipose tissue and converted into ketone bodies in the liver. These serve as an alternative fuel for cells and the brain. In specialized literature, this point is referred to as the "metabolic switch." Most people today simply no longer reach it.
Source: de Cabo & Mattson, The New England Journal of Medicine, 2019
HOW THE JUICE CLEANSE HELPS
The reason why resolutions fail and cleanses work is simple: A cleanse is an appointment. It has a start date, a duration, and an end – and for those days, it takes all decision-making off your plate. What, when, how much, where: questions that otherwise run in the background all day long. For most people, that is precisely where the relief lies. Not in the deprivation, but in the fact that one area of life is simply taken care of for three days.
5. Breaking bad eating habits
It is the observation that appears most frequently in anecdotal reports and that no one expects: after a few days, things taste more intense. Vegetables turn sweet. Spices become distinct. The croissant seems almost too sweet. Fried food no longer tastes good.
Underlying this is something greater. Most eating habits were never decided upon; they accumulated. The wine on Wednesday. The pastry with the second coffee. No one chose that—it just slipped in. And it is hard to change from within everyday life, because that very everyday life sustains it.
WHAT HAPPENS IN THE BODY
Taste perception is not hardwired; it adapts. In a controlled study, one group reduced the proportion of simple sugars in their diet over several months. Afterward, the participants rated the same pudding sample as around 40% sweeter than the control group. The sweetness had not changed—the perception had.
Source: Wise et al., The American Journal of Clinical Nutrition, 2016
HOW A JUICE CLEANSE HELPS
A cleanse sets a hard beginning and a hard end. Three days, five days, with a defined start and a defined return. That is the difference from "I'll eat less sugar from now on" – a resolution without a beginning also has no end.
And the crucial part is not the fasting days, but the day after. That is why the transition day and the Holistic Health Starter Protocol are part of the box: The point is not the cleanse. The point is what you take away from it.
6. Because the mind fasts along too
The most common concern regarding juice cleanses is: I won't be good for anything for three days. What participants actually report, however, usually looks quite different – and is documented in large cohorts.
WHAT HAPPENS IN THE BODY
In the largest fasting study to date – 1,422 participants at the Buchinger Wilhelmi clinic, analyzed in collaboration with Charité Berlin – physical and emotional well-being increased significantly during the fasting period. Side effects occurred in less than 1% of the participants.
Source: Wilhelmi de Toledo et al., PLOS ONE, 2019. Note: This involved medically supervised therapeutic fasting over 4 to 21 days.
HOW THE JUICE CLEANSE HELPS
Compared to water fasting, juice maintains a basic supply of carbohydrates – exactly the reason why most people can work normally during the cleanse. The process is prescribed: which bottle, when. The AI Health Coach takes over the part you would otherwise be Googling at 11 p.m. on Day 2. Practical tip: Start on a Thursday, then Day 2 will fall on the weekend.
7. Because summer is the easiest way to start
Fasting in January fails due to reality: it's cold, it's dark, and the body wants a casserole. In summer, almost everything is easier.
WHAT HAPPENS IN THE BODY
The explanation here is more mundane than for the other six reasons – and yet it is the reason why cures are completed more frequently in summer. Heat lowers the appetite for heavy, warm meals anyway. Cold and liquid options seem attractive rather than restrictive. The calendar is emptier, the evenings are less complicated.
Regarding the most common question: In the aforementioned study with 1,422 participants, 93.2% stated that they had felt no hunger while fasting. The hunger that most people fear is generally just a habit – and that usually fades away in the course of day 2.
HOW THE JUICE CLEANSE HELPS
The most time-consuming part of fasting is completely eliminated: no shopping, no recipes, no cooking. The juices arrive chilled, in the right order, and you can choose the delivery day. You also decide the duration yourself – 1, 3, 5, or 7 days. For your first attempt, 3 days is the standard starting point.
A juice cleanse is the starting point, not the ultimate challenge, and that is precisely its advantage. It is the form of fasting that you can actually stick with while working, putting children to bed, and leading a normal life.
Secure your juice cleanse in the summer special now
COMPARISON: FASTING YES! BUT HOW? |
Water fasting/therapeutic fasting
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Juice fasting
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|---|---|---|
| Suitable for everyday use | 
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| Without medical supervision |
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| easy entry |
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| Straightforward |
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| For fasting pros |
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THE BETTER JUICE CLEANSE FOR BETTER RESULTS
That is why fasting has been a part of cultures for thousands of years
OLD SELF
↓ Tired & sluggish
↓ Bloating & heaviness
↓ Blemished skin
↓ Cravings & loss of control
↓ Inner restlessness
NEW ME
↑ Focus & clarity
↑ Lighter gut feeling & balance
↑ Natural glow
↑ Impulse control & a new body awareness
↑ Calmer physical sensation
DALUMA juice cleanse vs. others |
Better Juice Cleanse Plus
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Other juice cleanses
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|---|---|---|
| Certified organic, free from pesticides & fungicides |
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| Cold-pressed & HPP |
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| Diverse functional ingredients & high vegetable content |
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| Pollutant-free PLA packaging without mineral oils or plasticizers |
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| Developed with nutrition experts |
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| AI Health Coach & daily step-by-step support for a successful juice cleanse |
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| Organic kombucha with active fermentation cultures |
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| Cleansing Activated Charcoal Face Mask for self-care from the outside |
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HOW YOUR CURE WORKS
Breaking the fast
Gentle, easily digestible food such as soups, steamed vegetables, and shakes relieves the digestive system in a variety of ways and thus serves as preparation for the juice cleanse. You are slowly signaling to your body to switch to lighter food. Drinking plenty of fluids, salty broths, and electrolytes supports your mineral balance.
Our health coach is always available to support you and assist you with any questions or uncertainties.
Eve
Start the cleanse with gentle preparation by consciously reducing your food intake and incorporating more rest into your daily routine. This creates a structured transition into the fasting phase.
The Burning Man Shot is integrated into the process as the first flavor impulse. Plan your last meal as early in the day as possible to create a clear temporal separation between eating and fasting.
Our tip: Take time for relaxation and make the start of the cleanse a conscious ritual – for example with a warm bath, a face mask, or a short meditation.
Cleanse
Your body can get used to a change in diet during this phase. Some people find this adjustment challenging.
Our tip: Small rituals can help you navigate this time mindfully – for example, listening to your favorite music, podcasts, breathing exercises, or taking relaxing walks.
Self-care moments
In this phase, it is primarily your subjective experience of the day that changes. Moments of heightened energy or phases of lower resilience can occur and, for many, are part of a conscious break from their usual rhythm. Be mindful with yourself and notice what does you good. This time is particularly suitable for turning your focus inward and creating space for self-reflection.
Our tip: Plan specific self-care moments – such as journaling or the Cleansing Face Mask – and use them as conscious rituals within your routine.
Regeneration
On the last day of your juice cleanse, the focus is on a conscious and harmonious return to regular eating habits. The transition is designed to gradually integrate more variety back into your daily routine.
As a fermented beverage, kombucha is part of this ritual and complements your day with its characteristic flavor profile and sensory depth. It thus accompanies the transition back to your usual diet in an enjoyable way.
Following this, the rebuilding phase begins with the Holistic Health Starter Protocol supplement. This program is designed as a structured addition for the first few days after the cleanse and can be flexibly integrated into your daily routine.
Over 50,000 people choose DALUMA because they know it's better.
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FREQUENTLY ASKED QUESTIONS
Am I hungry all the time?
Less than most people expect. In the largest fasting study to date with 1,422 participants, 93.2% stated that they did not feel hungry during the fasting period. What occurs on day 1 is usually habit rather than physical hunger – at four in the afternoon, because that's when you usually have a snack. From day 2 onwards, this subsides significantly for the vast majority.
Can I work during my rehabilitation?
Yes. That is precisely why a juice cleanse is the most practical form of fasting for everyday life. Even so, don't plan a week with three presentations and a move. If you have a choice: start on a Thursday, then day 2 will fall on the weekend.
And sports?
Walking, yoga, easy cycling: sure. Interval training, heavy weights, or a long run: better in the week after. Your body is currently working on something else.
How much weight will I lose?
We deliberately make no claims about this – it cannot be predicted reliably, and that is not the point of a cleanse either. Part of what the scale shows after three days is water and intestinal content, which will return. What remains is more of a feeling and a changed perspective on one's own eating habits.
Does the yo-yo effect happen afterwards?
A cleanse is not a diet and is no substitute for a change in diet. The transition day is crucial: those who go out for brunch immediately after the cleanse won't get much out of it. Those who spend the two or three days afterward mindfully will get the most out of it.
How many times a year can I do this?
Most people do two to four treatments per year, often at the change of seasons. One treatment per quarter is a common rhythm for healthy adults.
How do the juices arrive and how long do they last?
Chilled in an insulated box, delivery date freely selectable. Upon receipt, the juices should be refrigerated, where they will remain fresh for the number of days indicated by the best-before date. The exact date is printed on each bottle.
Who is a juice cleanse not suitable for?
A juice cleanse is a food product, not a medicinal product, and is not a substitute for a balanced diet or medical treatment.
A fast is not suitable during pregnancy or breastfeeding, for children and adolescents under 18 years of age, for those who are underweight, for those with a current or past eating disorder, or for those with diabetes, kidney or liver disease, cardiovascular disease, or who are taking medication – please consult a doctor beforehand in these cases. This also applies if you are unsure whether any of these apply to you.
Discontinue the cleanse if you experience dizziness, a racing heart, or severe discomfort.