Hi Mads You need to understand one things very clearly. And my photo is just a joke by the way, I spent the last year cycling fulltime in the USA so have learnt the hard way over many years of sport. That one thing is this: When you exercise you exercise and need fuel to exercise otherwise your body will try and shut itself down and will go into what is called survival mode whereby it slows all your systems down including your metabolism because it is unsure when it will get food again. So here is my opinion on what you did wrong on that morning. You had a cup of coffee and took only water on the ride. The reason you got bad sweating was a version of the bonk and hence you lost all your power and probably had to limp on home. You need to eat when you exercise even when you are trying to loose weight. Actually, the weight loss will come with slow cycling when you heart rate is between 50-60% as this is known as your fat burning zone. When you exercise up at 70-80% you are in your carbohydrate burning zone as fat cannot be pulled fast enough fromm your body and hence only carbs (glycogen) are used. To loose weight you need to ride slower, but to stay on the bike still need a certain amount of food to go into your system or else you will bonk most often than not. The trick to loosing weight is to do it consistantly by reducing your calorie intake when you are not exercising. I.e. after you have ridenn you get a recovery meal and then rather eat less for suppper and cut out the snack. The detox pills whilst filled with nice detox substances like dandilion and exotic roots that will help you get rid of excess water by helping your kidneys function better are not going to help you loose weight on their own and can leave you feeling less wanting to exercise cause they have other side effects such as headaches and lethargy. Been there done that. My advice is simple. And it really is as simple as this as weight loss is an energy balance. Take what you would normally eat and reduce it a tiny amount. Say 5%. If you start to loose weight with normal exercise then great. If not, take another 5% away, until you are loosing between 500g and 1000g a week. If you are already skinny say 200-500g a week. This way you keep strong for exercise and loose weight. You also keep all the good nutrients in your diet which are often taken away during dieting. You also keep eating foods you enjoy just in smaller quantities. This way you will make it easy to sustain your diet and loose weight at a healthy rate in a healthy way. When you reach your goal weight slowly start to add back until you reach an equilibrium. It will take some trial and error, but this way you will get to know your body well without taking a beating by going extreme, bonking, getting ill, being off the bike for some timme and then putting on more weight in the process. Also remember that if you have only recently started exercising you will naturally put on a kg or 2 and this is purely because you muscles are adpating and will become a bit denser. The weight will start to come off again after a few weeks and then you will see good results. Trust me this when I say there is no quick way to weight loss when you want to keep it off and in a healthy way. Good luck and remember, consistency is the key to many things in life.