Therapeutic fasting for beginners: the first fasting week, realistically

The essentials at a glance

• For first-time fasters, the Tannerhof recommends about seven fasting days plus two to three transition days, totaling around ten days; this duration is a recommendation, not a strict rule.
• A first fasting week follows a clear sequence: relief, initial consultation and start of fasting, transition days, quiet fasting days, breaking the fast, and reintroduction.
• The transition to a fasting metabolism can be noticeable on the second and third days; after that, it becomes easier for many.
• Buchinger therapeutic fasting is not a zero-calorie diet, but a conscious, time-limited abstinence from solid food and stimulants, supported by tea, soup, juice, and plenty of fluids.
• At the Naturhotel Tannerhof, therapeutic fasting has been medically supervised for over 70 years, with a focus on supporting first-time fasters.

Therapeutic fasting for beginners: what it means

Buchinger therapeutic fasting is the conscious, time-limited abstinence from solid food and stimulants. For those fasting for the first time, this may sound like a lot at first – yet in practice, it is calmer than one might imagine. Unlike a strict zero-calorie diet, the body is not left without any intake: herbal tea, mild vegetable soup, freshly pressed juice, and plenty of fluids carry you through the day.

Therapeutic fasting is more than just a diet. It is a therapeutic method, a multi-layered cleanse, and an encounter with yourself. While weight loss can be a side effect, the core focus remains on relief, a clear reset, and gradually rediscovering a healthy relationship with food. Anyone looking for our medically supervised setting will find it in the Body Detox programme; the method itself is detailed on our page about Buchinger therapeutic fasting and in our Therapeutic Fasting & Schlanke Tanne Hub.

For anyone just starting out, there is one guiding quote from Johannes von Mengershausen, who originally brought therapeutic fasting to the Tannerhof: “In therapeutic fasting, you discover a new freedom: independence from solid food. Fasting means quietness, listening to what is happening within, and reflecting on what truly matters.” It is precisely this sense of freedom that most first-time fasters find so surprisingly profound.

How long does the first fasting week last?

The duration is a recommendation, not a requirement. The guest decides for themselves, and the longer you fast, the deeper the effects. At the Tannerhof, we generally recommend at least five fasting days, as otherwise, the transition process has little room to unfold.

For first-timers, a full week is ideal: about seven fasting days plus two to three transition days, making it around ten days in total. This length gives the body time to settle into a fasting metabolism, move past the transition days, and truly experience the quiet part of the week. In the end, this adds up to a good week of time that you should set aside – including fasting days, relief, and reintroduction.

Important for planning: The length of your stay is booked before arrival, either online or via our reservations team. This sets the timeframe before you even arrive in the Leitzach Valley. The initial medical consultation takes place on the first day of fasting, after your arrival; from that point on, the duration and schedule can be adjusted, such as extended, in coordination with the medical team.

The schedule for the first fasting week

A fasting week does not begin with the first soup, but with the relief phase – and it does not end with the last fasting day, but with the reintroduction phase. This arc is also professionally established: in the guidelines for fasting therapy, which can be viewed at the Ärztegesellschaft Heilfasten und Ernährung (ÄGHE), the classic fasting week is described as a sequence of a relief day, fasting days, and reintroduction days.

For beginners, it helps to get an overview of the process. The following table shows the phases of an initial week of fasting at Tannerhof.

The first day of fasting centers on the intake interview, which is designed to be holistic. The medical side includes a medical history, a physical examination including bioimpedance analysis to measure body composition, and a medication review. Furthermore, it covers why someone wants to fast, what goals they have at Tannerhof beyond fasting, what is currently happening in their life, and what previous fasting experience they have. The order is important: first the consultation, then the Glauber's salt—not the other way around.

Glauber's salt is the classic tool for starting a fast—a bitter saline solution that empties the bowels at the beginning. It is optional, not mandatory: depending on your tolerance, there are other methods, and the specific approach will be discussed during the intake interview.

What first-time fasters can expect during the transition days

The body needs one to three days to switch from its usual sugar metabolism to a fasting metabolism. During this phase, usually on the second and third days, symptoms of low blood sugar may occur: a feeling of weakness, slight shakiness, nausea, or headaches. This is part of the transition and no cause for concern. Green tea with honey helps balance this out, and the medical team provides attentive support during these exact days.

A large observational study by Wilhelmi de Toledo and colleagues from 2019, published in PLOS One, shows how well longer fasting is tolerated. 1,422 people were monitored over fasting periods of four to twenty-one days using the Buchinger method. No severe or lasting adverse effects occurred; physical and emotional well-being increased significantly in all groups. Where symptoms did occur, they were primarily in the first few days of fasting—exactly where the medical support at Tannerhof is focused. Remarkably for beginners: 93.2 percent of participants experienced no hunger during the fast.

After the transition days, it becomes easier for many. The need for sleep often decreases while sleep quality improves, and some people experience a "fasting euphoria" due to altered serotonin metabolism, which varies from person to person. Fasting creates a break and an abundance of time with yourself and for yourself.

What fasters consume

The special thing about the Buchinger method is what is on the menu during the fast. Instead of strict abstinence, a calm rhythm of mild liquids carries you through the day. At Tannerhof, it looks like this:

• Morning: an herbal tea.
• Midday: a mild vegetable broth.
• Evening: freshly squeezed fruit or vegetable juice, accompanied by your choice of buttermilk or Sojade as a source of protein.
• Throughout the day: around three liters of fluids—fasting teas, mineral water, lemon water, and hot ginger water.

In addition, there are other protein sources if needed and a base supplement to counteract acidic metabolic products and uric acid crystals. And there is a small concession that does not negate the fasting character: a spoonful of honey or an espresso to bridge a low point. Fasting guests take their meals in the "Fasterstube," a dedicated dining room for fasting guests—a different pace than that of the guests enjoying their meals in the main dining room.

What supports the start: medical care and environment

Medical support is not strictly mandatory for fasting, but it is sensible. At Tannerhof, therapeutic fasting is always medically supervised because the house's medical experience is an integral part of the fasting process. The doctors at Tannerhof are experts in fasting; they monitor vital signs and circulation as well as your individual progress. Especially for beginners, this provides a calm framework: whatever happens during the transition days is in good hands at all times.

Medical appointments form an arc throughout the week. It begins with the intake interview on the first day of fasting, followed by a follow-up medical consultation if necessary, and concludes with a final review. In this final consultation, we evaluate what has changed, which recommendations are suitable for everyday life, and what the transition to regular nutrition can look like afterward.

The accompanying range of therapies is deliberately broad because fasting is more than just a change in diet for a few days. Medical treatments include bioimpedance analysis, IHHT altitude training depending on the program, and, if medically appropriate, ozone autohemotherapy. In addition, there are wraps and compresses such as the liver-supporting hay flower wrap, aroma wraps, as well as mud and warm packs, baths and showers such as Kneipp contrast showers, and magnesium-rich detox baths. These are complemented by massages such as the fasting massage, the detox massage with royal oil or acidosis massage, lymphatic drainage, and foot reflexology, supplemented by breathing therapy. For the mental side, we offer psychotherapeutic coaching, nature coaching, business and communication coaching, and art therapy.

Your surroundings and medical guidance play an equally vital role: fasting in a deeply moving landscape makes the experience all the more transformative. Bayrischzell, the alpine meadows, the mountain stream, the crisp, pure mountain air, and views of the Wendelstein create the setting for your first week of fasting. Gentle exercise remains part of the journey, carefully dosed: moderate baseline cardio and gentle strength training are just as readily available as yoga, Feldenkrais, Tai Chi, and hikes paced gently to suit your fast—the body is nourished from within. The Tannerhof Spa, featuring an indoor pool, a historic sauna hut, and the BadeHarpfe with its 25-metre outdoor natural pool opening up views between the Wendelstein and the Sonnwendjoch, offers the perfect sanctuary for peaceful moments in between.

Breaking the fast and the transition period: the most important part for beginners

Especially for first-time fasters, it is worth noting that the transition period is not an afterthought to fasting, but rather its continuation by other means. Breaking the fast still counts as a fasting day: a small cup of fasting soup at noon, then an apple, raw or stewed, with every bite chewed thirty to forty times. In the evening, there is a vegetable soup with non-puréed vegetable pieces. Those who fast for seven days usually need two to three transition days, totaling about one-third of the fasting period.

The focus is not on a complicated meal plan, but on the guiding question of what is good for the microbiome: easily digestible vegetables, fermented foods, plenty of fiber, and mindful chewing, while respecting your sense of satiety. In the final consultation with the attending physicians, your post-fasting diet will also be discussed. If a sustainable change is desired, you can follow up with the "Schlanke Tanne Low Carb," our in-house low-carb diet. It is not a substitute for Buchinger fasting, but a way to carry the fasting experience into everyday life. Intermittent fasting, such as a 16/8 rhythm, can also build this bridge – not as a replacement for a compact fast, but as a way to integrate it into daily life.

In this way, a first week of fasting becomes far more than just a few days of going without: it gains a beginning, a middle, and a gentle transition. Perhaps that is simply the modern expression of the old Tannerhof adage: “Become what is essential.”

Who can fast and who should consult a doctor

The key ingredients for fasting are personal resolve and a willingness to embrace the experience. Therapeutic fasting is not suitable during pregnancy, breastfeeding, or for those recovering from anorexia. In the case of chronic illnesses, ongoing medication, or any uncertainty, a preliminary medical consultation by telephone can be arranged prior to arrival; the initial consultation on your first day of fasting will ultimately determine the plan. Medical services are billed through the private medical practice at Tannerhof.

Discover therapeutic fasting at Tannerhof

Naturhotel Tannerhof has offered medically supervised Buchinger therapeutic fasting for over 70 years, backed by seasoned expertise across every team and nestled in Bayrischzell amid alpine meadows, mountain streams, and panoramic views of the Wendelstein. To explore the details of your first fasting week and book online, discover our Body Detox programme and our page on Buchinger therapeutic fasting.