sixteen:eight® is the optimal supplement for intermittent fasting. Our specially formulated products target the different phases of fasting, providing essential natural micronutrients and trace elements to help you get the most out of your fast.

BOOST - your fire accelerator during the fasting phase.

The unique combination of vitamins and trace elements gives your energy metabolism the extra BOOST for the active fasting phase, stabilizes blood sugar levels, and helps against cravings.

  • Optimizes your natural fat metabolism.
  • Supports your ability to concentrate.
  • Prevents cravings.

ESSENTIAL - Your perfect foundation for intermittent fasting.

ESSENTIAL provides a balanced basic supply of essential vitamins and trace elements and is optimally formulated to meet the special needs of intermittent fasters.

  • Prevents possible deficiencies and deficiency symptoms.
  • Makes your body fit and resistant..
  • Strengthens the immune system.

PREP - Your smart preparation for the fasting period.

PREP is a prebiotic protein preparation with essential minerals for muscle and energy metabolism and serves as a smart preparation for entering the fasting period.

  • Prepares your body optimally for fasting.
  • Prevents muscle breakdown.
  • Provides a pleasant stream feeling.

Easy to integrate into the daily routine

Support and success in the fasting routine

Provides a balanced and high quality diet

Improves physical and mental health

Questions and answers


Why should I intermittent fast with sixteen:eight® products?

We are absolutely convinced of the general positive effects of intermittent fasting. For this reason, we are happy with everyone who starts intermittent fasting - be it with or without the products of sixteen:eight®. However, various studies show that the already very beneficial effects of fasting can be further optimized by the accurate intake of vitamins and micronutrients, and this is exactly what our products aim at. That's why we say: Intermittent fasting is great, but it gets even better with products from sixteen:eight®.

Who can use sixteen:eight® products?

Our products are basically aimed at everyone who considers intermittent fasting as part of their diet. It doesn't matter whether you are a beginner or an advanced faster, which method of intermittent fasting you prefer, or whether intermittent fasting is only carried out in phases or permanently as a fixed component of your individual nutritional concept. We firmly believe that the accurate use of our products as part of your individual intermittent fasting approach will help you reach your goals faster and more sustainably.

Can I take sixteen:eight® products independently or only as a package?

All of our products can be used independently from each other and according to your individual needs and goals. For example, we recommend BOOST if you are primarily interested in accelerating fat burning and training your fat metabolism, whereas we recommend PREP if you want to prevent muscle loss during the fasting phase and support your intestinal health. However, our products work best in a package, which is why we also offer them at a reduced price.

What quality features distinguish products from sixteen:eight®?

All our products are made in Germany without exception and meet the highest quality standards. International scientific data forms the basis for our innovative product compositions. No artificial additives, colorings, or sweeteners are used, nor is magnesium stearate, as found in many other nutritional supplements. BOOST and ESSENTIAL are 100% vegan, which means that no animal ingredients are used at all. All our products are of course gluten- and GMO-free and are manufactured without gelatine.

intermittent fasting and weight loss

Is intermittent fasting better than other diets for losing weight?

There is no general answer to this question. There are various types of diets that quickly lead to initial results. With intermittent fasting, it often takes a little longer to achieve visible results. However, it should be noted that long-term experience with intermittent fasting has been extremely positive. This is due to the fact that intermittent fasting can be permanently established as a lifestyle without the feeling of abandonment, as is the case with many diets. This leads to the absence of the infamous yoyo effect, which means that the result is often more sustainable. In addition, intermittent fasting makes it easy to exercise and build up muscles and improve your endurance capacity or fitness.

How long does it take to lose weight with intermittent fasting?

Losing weight with intermittent fasting starts immediately. However, weight loss success and speed are influenced by various factors such as starting weight, individual disposition, physical activity, and basic diet. It is important to note that intermittent fasting focuses on the general change to the new lifestyle and not on short-term success. This will happen on its own in the medium term.

Why is there no yo-yo effect with intermittent fasting?

The answer to this question has not yet been fully researched, but from countless reports, it is clear that the yo-yo effect does not occur with intermittent fasting in the vast majority of cases. One explanation is that intermittent fasting does not fundamentally reduce the body's energy requirements, but that these are regulated again and again by eating phases. After fasting, the body is therefore not instructed to build up larger reserves as a precaution, which means that there is no yo-yo effect.

What makes intermittent fasting so special that so many people succeed with it?

The question of why so many people around the world celebrate individual success with intermittent fasting cannot be answered in general terms. What is clear, however, is that the concept of intermittent fasting is highly compatible with everyday life, which is why it is much easier to stick to permanently than conventional diets. Starting and implementing intermittent fasting is very easy and does not require any major changes in shopping habits or food choices at mealtimes. Only the period of food intake is limited. This often leads to better food choices and a healthier lifestyle over a medium-term period. In addition to weight loss, many intermittent fasters report a new attitude to life with more energy, better sleep, and the absence of digestive problems, which are certainly further motivating factors that have made intermittent fasting an integral part of many people's individual dietary concept.

Do I have to stick to a special meal plan during IF?

Basically not, because intermittent fasting itself only regulates the meal times, but not what is eaten - in this respect, intermittent fasting does not provide any specific rules or restrictions, as conventional diets do. However, it is strongly recommended to check your general eating habits when you start intermittent fasting and adjust them if necessary. After all, the full potential of intermittent fasting can only be realized within the framework of a balanced and healthy diet.

Can I also do intermittent fasting if I am of normal weight?

Of course, you can! Weight loss is not a must, but it can be one of the many positive effects of intermittent fasting. Many intermittent fasters focus on completely different health benefits such as the positive effects on the aging process of the cells (anti-aging), the influence on the body energy level, or the anti-inflammatory effect.


How does intermittent fasting work?

Intermittent fasting is a method of fasting that alternates between fasting and eating for several hours or even days at a time. The most popular variation is the 16/8 method, where fasting is done for 16 hours at a time and food is allowed for 8 hours at a time. 16/8 can usually be achieved by skipping either breakfast or dinner, which is why many people are already intermittent fasters without knowing it.

What are the different types of intermittent fasting?

There are different variations of intermittent fasting, but the basic concept is always the same: In essence, it is always about completely abstaining from food for certain time intermittent. The different types only differ in how long the "fasting" phases are, and here one can distinguish between methods: Those variants in which food is abstained from for hours (16/8, 20/4) and those in which food is abstained from even for days (5/2, 1:1, 1:6).

What is the best rhythm?

This is a very individual decision and there is no one-size-fits-all answer. In the end, everyone has to balance for themselves which method achieves the best combination of weight loss and longevity. The 16/8 rhythm is undoubtedly the most popular, as it promises a very good compromise between practicability and results and can be followed without major restrictions.

How does intermittent fasting work?

The phased abstention from food leads to activation and regulation of various endogenous processes. These include the reduction of fat reserves, the regulation of insulin levels, anti-inflammatory effects, and autophagy (also known as cell cleansing), which was recently awarded the Nobel Prize in Medicine. The final effects, however, go far beyond the respective processes and even influence mood, performance, sleep, digestion, and much more. The best thing is to try it out for yourself and gather your own experiences. An interesting fact: There are regions in the world, the so-called "Blue Zones" (e.g. Okinawa, Ikaria, Loma Linda), where people often live to be more than 100 years old. Typical civilization diseases are hardly known there. Intermittent fasting is a key feature of the way of life there.

How long do I have to keep up with intermittent fasting?

As long as you want. A fixed period is not prescribed, but the medium-term goal should be to make intermittent fasting a fixed part of your dietary routine in order to benefit permanently from the multi-layered positive effects. For this reason, intermittent fasting is usually described as a lifestyle rather than a short-term diet, and many experts even advise lifelong practice.

Is intermittent fasting a diet?

Intermittent fasting is neither a reduction diet nor is it not a classic fasting diet. We think it is secondary what you call it, but it is much more important to know that in many cases the effects go far beyond weight regulation (mostly weight loss). For this reason, intermittent fasting is also very popular with people of normal weight who have no aspirations to lose weight.


Who should be advised against intermittent fasting?

We recommend that pregnant women, breastfeeding mothers, children and adolescents, people with current or past eating disorders, as well as people with pre-existing conditions that are incompatible with fasting, refrain from any form of fasting, and of course, this includes intermittent fasting. This is largely due to the fact that studies are still insufficient. If you are unsure, we advise you to consult your family doctor.

What are the risks and side effects of intermittent fasting and our products?

We are not aware of any side effects associated with sixteen:eight® products. We are also not aware of any general risks associated with intermittent fasting, as long as you do not belong to one of the groups that should better abstain from fasting. Nevertheless, we always advise you to listen to your body before you start intermittent fasting and to have your family doctor confirm your tolerance, especially if you have any pre-existing conditions.


How much are the shipping costs?

Your order is free of shipping costs if the value of goods exceeds 50€, otherwise, there is a shipping charge of 3.90 EUR for delivery within Germany.

How long does it take to receive my order?

We always do our best that you don't have to wait too long. As a rule, your parcel will reach you within 1-3 working days.

What payment methods do we offer?

You can pay with almost all modern payment methods, from credit card to Klarna to Paypal, and of course, you can also pay by invoice.

Can I return my order?

Of course, you can cancel your order within the statutory period and return the unopened product to us, in which case we will of course refund the full purchase price.