Our Members

Emma Geurts de Leng, 43 years old, GZ psychologist Zwart & DeLeng psychologists practice (participated 6 times)

Participated 6 times

“My motivation is to keep as much energy as possible during the day to give to others and to grow old healthy longer and I think 5 Day Fast is really fantastic! Why?

During the 5 days you can just eat, which is already very special, and the menus are also really tasty! Eating biodynamic products cannot be compared to a juice cleanse. You can enter the menus into your daily life. As I have done it more often I noticed that I have become good at it. It is easy to keep up anyway, but the fifth day is one of hunger. Fortunately, it's almost over and we're going to do some nice shopping for day 6. My husband and I do it together regularly. It brings a nice connection in such a week that you take on the challenge together.

I had already done many health experiments in my life and had also read more about Dr. Longo and the fasting mimicking diet. I'm really happy that I discovered 5 Day Fast and it's nice that 5 Day Fast has completely unburdened me. Not only does it come to me three times a year, but also when I have a question I feel taken seriously and there is direct contact.

Every time I fast I experience a physical and mental reset. You build a different relationship with food. I don't do it for my weight, but mainly for a longer healthy life. It is also nice that your skin improves, you feel a positive energy, and it is of course nice that your stomach and your whole body is tighter afterwards.”

Harmen Meijer (33 years old / Account manager)

Participated 6 times

“The biggest benefit for me as an athlete is starting a new marathon program and losing some pounds before the start of the program and the race itself. In addition, it is always a good reset to simultaneously pursue a healthier lifestyle and to realize that I do not need everything that I put in my mouth throughout the day.”

Ruben van den Boogaard (54 years old / Architect INTOarchitecture)

First Timer

"So I got 5 Day Fast for my birthday and went into it kind of blank. The first two days I was tired, but then it got better and I had good energy. I experienced the five days very positively and I feel me now nice and healthy, fit and a lot lighter, also nice and natural. During the week you discover how much you actually eat in a day. That is something I will continue with now. You really don't have to eat that much all the time. I did it for the first time and together with my wife and that's fun. Taking on the challenge together and the ritual of preparing the dishes together creates a connection."

Heather Rose Tammes (45 years old / Teacher and team leader primary school Amsterdam)


“Great awareness of how to eat healthy. Because you are actively working on this for 5 days, you make a start for change. I feel fitter and healthier thanks to 5 Day Fast.”

Janna Schotte (21 years / HB0-V student)


“Through 5 Day Fast I have experienced that by eating more consciously and exercising I am healthier and fitter. And I also lost 5 kilos of excess fat. It is important that you keep moving afterwards and eat the right things.”

Izaak Quist (41 years old / Director)

Participated 2 times

“I really wanted to do it the first time. I wanted to detox my body and immediately noticed that my body was cleansing itself every day. I also quickly reached a “ketosis” state which is pleasant to experience. I can wholeheartedly recommend the tingling in your head and over your body. The second time, however, I had less of a goal in mind. Although I wanted to reduce my weight, I noticed that my mental readiness was a lot lower. Although at the end of the week there was a number on my scale that I hadn't seen in a very long time, I think it helps you to think about your goal before every 5 days.”

Nathalie Bremer (51 years old / Director Project Office Primary Education Southeast)

First Timer

"I thought it was a great experience to do. I didn't really experience any feelings of hunger. The first 2 days I was tired in the evening and in the mornings I had a slight headache. I thought that was strange because I normally have that never. But ok, from the third day I started to feel really good. The whole week I slept really well and more and more I started to experience a kind of "high". I had the greatest "high" on Saturday. My expectation was that I wanted to eat bread with Mozzarella, for example, but once at breakfast it became nuts and dried apricots. The "5DF breakfast" is by the way a keeper. I also liked the evening dishes and I found it striking that I tasted much more . It was also very nice to do this with my partner. We just had a lot of fun. I take a number of dishes into our normal life. I have become more aware of what I eat in a day. I do that now much less and has also been exchanged for, for example, the dates. I can really recommend it, although I think it is pricey."


First Timer

“A few weeks ago I participated in 5 Day Fast for the first time. I am a triathlete and have experience with sports fasting and I found this to be doable by comparison. Five days is manageable and the feeling of hunger was not too bad. On the first day I had a bit of a hard time due to the caffeine, or lack of it. But in terms of energy I felt good during the week and especially on Thursday and Friday. The recipes are simple and quite tasty. More could be done with herbs. I enjoyed doing it together in the community, although not much was said. After the five days I also lived like a monk on Saturday and Sunday. Conclusion, it has been a good reset. I eat a lot of vegetables and I no longer snack in the evening. Immediately after the five days I was five kilos lighter due to the moisture. That is now still three kilos and that is good. What I also liked was the guidance and so was the advice not to do interval training immediately. I waited until the following Wednesday to do so and it was excellent. This has gone wrong in the past in another program and it bothered me. I have also recommended 5 Day Fast to several people and I would like to do it again in a few months."

Angela Braspennincx (45 years old / Health scientist at Avans University of Applied Sciences)


“In any case, Ramon and Marijn are great guys with a goodwill factor and the daily films we received are fun. The five-day is already pleasant because you spend the week mainly with yourself, with your food and your sport. Nice that 5 Day Fast comes from the sports side now. Then you also compare it with sports fasting and then this is doable. Only five days and no juice cleanse but really healthy food. I haven't been hungry, with the exception of Friday night when my husband sat next to me on the couch with a bag of chips.

Ten years ago I delved into Dr. Longo from clinical pictures and then regularly wondered why no one knows this? That in this case, imitating fasting, you can improve health. I have now participated myself from my interest as a health scientist and to work on my preventive health, which I found a positive experience. I felt good during the five days, but did not experience any extra energy or a lower heart rate. The first weeks after that I had a feeling of hunger that I could hardly resist.

However, we are now a few weeks further and I must say that it is going bizarrely well. After consultation with Ramon, I let go of everything and just started eating again as needed, but then nuts, fruit, and occasionally dairy and meat. In principle, you can eat unlimited amounts of unprocessed food. It's like I have new lungs and a new heart. I train for an hour and a half in the pool and then cycle home fit. Before, I couldn't get ahead with the sweat on my back.”

Jorrit Stracke (35 years old, real estate entrepreneur)

First Timer

“I started the five-day cure on Sunday together with the athletes group.

To start directly with the result; I have never felt so strong in the training days on day 7 and day 9 and I am completely excited. I do triathlons and have also done sports fasting, but I won't do that anymore: that really means more and longer suffering. I am really surprised that with these five days, while you continue to eat and exercise, you achieve the same result and I feel even better in terms of sports.

I did have a few moments when I felt weak, especially on Tuesday late afternoon. I then took a date, went for a walk and then it went better. From day four I felt really good.

During previous fasts I can sometimes get grumpy, but that was not the case this time either, and I also checked with my wife.
What is nice during such a cure is that it makes you aware of all kinds of things. I feel grateful and closer to myself and that's beautiful.

Participating in the athlete community and waking up to the movies in the mornings was fun. This makes you experience that you are not doing it alone and that makes you less likely to give up.

On Friday it was ready and on Saturday I had the tour of North Holland. That was no longer normal. Never cycled a segment at an average of 42.5 km per hour, let alone after 130 km. Physically I felt so incredibly strong. Two days later something similar. I had an endurance run of 18 km on normal shoes (without carbon) and I ran with an average pace of 4:11 min / km. I may have never felt so strong in my life.

In short, in terms of results and in terms of treatment, nothing but praise, I am very enthusiastic. Once you've done this you're hooked.

Since then I also do my shopping at the natural store. Not only do you have a reset during the week, but you also continue with it afterwards. So that is really super powerful.”

Rutger Bruin (61 years old, owner of Blue Ocean Recruitment BV)

Participated 2 times

“I came into contact with your program through my son who trains for triathlons at Apollo Endurance. I used to do a lot of sports, but at a certain point I kept getting injuries, especially when running. Still, my son Joep inspired me to start doing triathons, at my level that is. I started doing that two years ago and through a gradual build-up I am now fit again and I have done a number of triathlon sprints. This year the Olympic distance in Oudekerk is on the program.

I am really excited about 5 Day Fast. The beauty of your program is that you can reset yourself in five days. Before I knew your fasting program I was often struggling, for example after the winter, to lose a few kilos. It's really amazing, but I just experienced it again. I am kilos lighter and because your fat burning engine has been activated, I now experience a nice energy, I have a better focus on my work, I feel fitter and I have broken 'bad' habits.

Immediately after the 5-day I was three kilos lighter. In the following days, the fluid balance will return to your muscles and you will gain some weight again. In the meantime, however, I have become an extra kilo lighter and that is mainly due to that reset that you make in just five days and with which you then continue by eating healthier, among other things. That's what I like about 5 Day Fast!

It does require that you strictly follow the menu & exercise protocol during those five days. I find that a bit difficult the first few days, because you also feel weak and I completely, because I normally drink a lot of coffee. The third and fourth day, however, you will get new energy and you will take pride in it, every day with your scales. I'm really positive! I have now completely stopped drinking coffee. You actually take that mainly to recover from time to time. I don't need that now.

Do I have any feedback? I would like to see more variation in the menus in the future, so that in my case, for example, I can take an alternative to the spinach dish.”

Frits Augstein (43 years old / Partner IFAA Accountants & Tax Advisers)

participated 2 times)

“From our office we have been looking after the interests of Marijn and his company for more than 10 years. When Marijn pitched his new business idea last year, I immediately thought I would like to try it myself. So also the deed added to the word. That was still in the initial phase where the groceries were done for you and you then had to pick them up yourself at a certain place and time. I thought it was a positive experience those five days, but I didn't experience that new energy or that I felt particularly good or healthy. The change came for me mainly after that. I had become really aware of my eating habits and I started to adjust them, after which the needs also changed. No extreme lifestyle adjustments, but just a little more healthy eating. For example, I have withheld breakfast, more fruit, fewer snacks and sweets, but also other sweets such as dates. We are now 12 months further and I am 12 kilos lighter. That is equivalent to one kilo per month. So 5 Day Fast really worked for me. Lately I have noticed that I have more need to snack, so the time is right to sign up as a 5 Day Fast member. I did that a few weeks ago and next week I will start again with a five-day.”

Monique Verweij (participated 3 times)

Participated 3 times

“What strikes me is that the three times I participated I experienced it differently each time. The first time I had difficult and less difficult moments. It was especially difficult to get rid of sugars and adjust my eating habits. I'm a real coffee drinker, but during the fast I don't suffer from the lack of caffeine because I consciously reduce my coffee intake in the days after such a week.

The second time I found it harder, but I didn't think about giving up. I was curious, 'Can I keep this up again? Didn't I succeed last time?'. It helped that I do it together with my husband, you are then in the same boat.

My last fast was in one straight line, I went through it very easily. Except Friday, the last day, which I found the most difficult. The knowledge that you can eat 'normal' again the day after was tough. For example, I was very hungry for a piece of cheese, I could hardly get it out of my mind.

The biggest benefit for me is that I'm losing weight. After the week something is added and after that it remains stable. Always lower than my starting weight. I have found out that the way of moving is important, that you have to sweat. That gives you an energy kick and you will lose more weight.”

Oscar Keunen (28 years old / Consultant at APPM "seconded to the municipality of Amsterdam for 3 days p/wk")

First Timer

Did 5 Day Fast together with three colleagues starting June 12, 2023.

“I already ate healthy, but a lot of bread. And I regularly do intermittent fasting, also because I don't always take the time to eat breakfast in the morning.

Our colleague Mellany had done 5 Day Fast at the beginning of this year and was enthusiastic. One day we talked about doing it with the team as a challenge. Then we invited Ramon from 5 Day Fast to first tell us more about what it entails and what the short-term benefits and long-term effects are. I've actually never done a nutrition program or weight loss program before. I do exercise regularly and often cycle, among other things.

We started together on Monday. It was the week that many people suffered from hay fever and that also affected me in the beginning. In terms of work, I found it difficult the first days. You feel a little hungry, lack of focus and sometimes it was difficult to concentrate myself. But because you do it with your colleagues, it was also fun.

However, on days 4 and 5 I realized that with some nuts, apple, a few dates and a tomato soup I could function just fine and even felt good energy. So the awareness that you don't need that much food at all is the most important positive point that I take from this challenge. Somewhere you already know that, of course, but you don't. During the five days you live through this and you actually feel it. The latter really raises awareness.

So the 5 Day Fast breakfast with nuts & apple were great and I just kept those. The advantage is also what I do have breakfast but don't spend too much time on it in the morning. Nice energy, by the way, the nuts and fruit instead of bread. With bread you have more of a peak in your energy, followed by a downer, which you then try to fix by taking more coffee.

I really liked the food. A week later, for example, we made the lentil stew at home again, which is simply delicious. My girlfriend joined in a bit. She is also involved in nutrition and supplements. It was nice that we also did this together at home.

The vital employee
Now afterwards I still feel fitter, more energetic and I have a good focus. There is awareness and not only with regard to food, but also sleeping on time, getting up early in the morning, having a light breakfast and feeling nice and energetic. In the context of vital employees, I would certainly advise other teams to do this, again something different than a communication training. It would be nice if employees could do this with their training budget. I think there is enthusiasm for that.

Would I do it again? It was an educational and positive week, but I also thought it was a bit expensive, at least if you did it more than once a year. But I'm not saying no!

“5 Day Fast: Our quest is to get people to do this three times a year for a structural improvement of your preventive health with the long-term goal that people live longer healthy lives without becoming chronically ill”.

“Oscar: yes, that's what you're telling me. I mainly only looked at the short-term benefits, I notice. But if you look at it that way, what is now 500 euros a year to live a longer healthy life without those diseases. Then it might not be expensive at all”.

Jetske Visser (61 years old / Beautician)

First Timer

Jetske has about fifteen years of experience with detoxing and did 5 Day Fast for the first time last May together with her friend Lorine.

"What I like about 5 Day Fast is that it is short but powerful: the five days are easy to oversee. On Monday I did suffer from a headache. Usually when I go detoxing I taper off, so no coffee, sugar and alcohol. This time it didn't fit, so that headache on the first day is just the way it is. However, I do advise others to cut down on coffee before they start.

I would definitely recommend 5 Day Fast. I was not hungry, I was able to focus well on my work and I had the feeling that my body was relaxing, which is a good feeling. I also lost some weight, which I also liked. After the five days I still stuck to breakfast, but at a certain point I started eating cottage cheese again. Yet every time you fast or detox you take something with you that you can apply in daily life."

Lorine Nuis (64 years old / Was purser at KLM "Early retired due to COVID-19)

Participated 2 times

“I know 5 Day Fast through my son Floris. I immediately signed up then, I was curious about what Floris had experienced. I've done it twice now. The first time I did together with my girlfriend Jetske, and those five days went quite easily for me.

I found it exciting and fun, read everything through carefully. And my girlfriend always makes a whole decoration out of her food, she even peels an apple in the shape of a flower. Then she sends that photo and then you have fun together, that stimulates subconsciously. The second time I did it alone, more between nose and lips.

The advantage of 5 Day Fast is that it is completely defined, with a beginning and an end. It's all written out for you. The nutrition you get is also good. I've already done several things and I'm not into juice fasting, for example, because I think a body just needs food. If you go juice fasting, you should also take a probiotic afterwards, I don't think it's good to shut down your intestines.

I like that it is related to health and sports in a scientific way, that it is not spiritual and is based on some eastern philosophy. I'm not that much into that. The next 5 Day Fast is already planned, in September.”

Kas Stuyf (51 years old / Psychologist and Entrepreneur)

First Timer

"Together with a friend, Kas did the five-day fast mimicking diet of 5 Day Fast for the first time around Ascension. the morning.

During the five days, Pablo and I just continued to exercise as we did before. The first day I had a tough time with the diet around lunch, and the fourth day was tough in the morning, but other than that it went pretty well. What I like about the protocol is that you are taken by the hand, and it all looks nice.

I would like to have clearly explained why I should do it three times a year, and why an annual plan is interesting then. The transition after the fifth day could receive a little more guidance, in terms of what you can eat to get protein."