Discover what happens inside your body as you fast for 3 days, 5 days, and 7 days. Intermittent fasting has many benefits, but it also has some drawbacks. Extended water fasting can result in some negative effects. But how long does it take for fasting to cause muscle loss, headaches, and extreme hunger? Find out what happens when you stop eating. 🔥 FREE 6 Week Shred: 🤍bit.ly/2Bv8CL4 📲 FREE Diet/Workout Planner Tool: 🤍bit.ly/2N41lTX After you eat a meal, your body enters an anabolic state, where food is broken down into simpler molecules and used as fuel so your organs can function properly. An organ in the abdomen known as the pancreas produces insulin which is a hormone that regulates the process of breaking down and metabolizing primarily carbohydrates but also protein. So insulin is the hormone that helps the cells absorb the glucose found in the bloodstream after a meal. Dietary fat, on the other hand, is broken down into fatty acids which are used by the body for energy as well as for many different biological processes like testosterone production for example. Excess fatty acids are converted back to triglycerides and then most of those triglycerides are stored in adipose tissue otherwise known as body fat. Meanwhile, excess carbohydrates from that meal will first get converted into glycogen which is a string of glucose molecules that can be stored and used later. Glycogen is mostly stored in the liver and your muscles. Since there's a biological limit to how much glycogen a person can store, once that limit is reached the rest of the excess energy is converted into triglycerides and stored as adipose tissue, otherwise known as body fat. This is the routine process that our bodies go through when we eat throughout the day. But what would happen if you chose to stop eating for 3 days straight? Well after about 6-10 hours of fasting, most of the glucose that's still circulating in your bloodstream will be used for fuel. At that point, your body will start shifting from an anabolic to a catabolic state. Since it's not receiving any new nutrients, your body has to start using its own glycogen reserves to fuel itself. It's at that point that the pancreas secretes glucagon. Glucagon is not the same as glycogen or glucose. It's actually a hormone, and one of its jobs is to signal your body to release glycogen and fatty acids. Also if your last meal was low in carbohydrates your body may start producing ketones as an energy source within this early stage of fasting. Ketones are chemicals produced by the liver when fat cells are converted into fatty acids. So in general during those first 6 hours, your blood glucose levels will start to elevate and then they'll gradually decline. Meanwhile, your ketone levels will do pretty much the opposite. They'll gradually rise, especially after approximately the 10th hour of fasting. (1) Now before you ever hit that 10th-hour mark, if you’re accustomed to eating three meals per day or you regularly eat a high-carb diet you'll probably experience hunger and low energy levels. If you ignore this hunger and continue fasting for at least 10 hours your body will start to increase the levels of a hormone produced by the pituitary gland called Human Growth Hormone otherwise known as (HGH). Fasting can actually increase HGH just as effectively as exercise, stress, and very low blood sugar, also known as hypoglycemia. (2) HGH plays an important role in the fasting process because it's associated with enhanced muscle growth, exercise performance, better body composition, a faster metabolic rate, stronger immunity, and faster recovery from injuries. (3) Although HGH is unlikely to lead to muscle growth in the absence of nutrients while you're fasting, it's believed to be responsible for delaying the breakdown of muscle. So it helps prevent muscle loss while fasting. It does this by stimulating metabolic processes such as protein synthesis and muscle tissue repair. According to research, the longer you fast, the more HGH you'll produce. For example, a study found that fasting for just two days increased HGH production by 5X. (4) Now at around 12-16 hours in, depending on how many carbs you normally eat, your body will continue to deplete its glycogen stores, while also increasing its reliance on ketone bodies. (5) The benefits of this initial period of fasting have been well documented because multiple studies have been designed to observe people fasting for Ramadan, which is a Muslim holiday where people stop eating food from dawn to sunset, every day for one month. The studies on this topic all provide an excellent overview of the benefits that fasting for 10-17 hours daily has on the human body. According to the findings, there's great improvement in weight management, digestion, and cholesterol levels. (6). Also, some studies show a significant decrease in inflammation markers associated with a number of diseases such as homocysteine, C-reactive protein...
I am almost to my 72hr mark fasting
i fasted just on a whim and this is the third night.
How frequently should you do this
I just finished my longest! 88hrs!! I really could have gone the full 92 but it ended at like 9pm and I was gonna go eat with friends so I ended early. But HOLY SHIT I felt aaaammmmmaaaziiiing!! I just naturally do like a 20-4 each day and I’ve gone 48-62hrs but this was so great. I’m really gonna go for six days soon. I think I’ll max out at that 😅
The POINT of this video is that 16 hours to 3 days is a reasonable period of time to fast. In 3 days of abstaining from food, the body loses body fat and improves its composition. For longer periods, glutamine levels drop and the rate of muscle breakdown increases relative to the rate of muscle protein synthesis, leading to muscle loss.
Terrible, just reading off a bunch of info. Boring
I started fasting. 1st thing I noticed was less dishes to wash. Saving money from not buying junk food and beer.
Day 15 going strong
Many experts explain that overweight person can fast for weeks, but lean person will start using muscle for energy after 1-3 days of fasting?
My math is that 1 lbs of fat can release max 30 calories over 24 hours.
So Im little overweight 200lbs with 25% body fat, so 50 lbs total fat.
max calories per day from fat burning 30*50 = 1500 calories
my MBR 2000 calories, without any activities.
I exercise, thus minimum needed 2500.
Let's say during fasting body burns 25% less calories, thus at least 2000 calories.
Looks like there is 500 calories shortage when fasting,
how this shortage will be covered?
will I be losing muscle mass?
is it practically possible to get calories faster from fat than 30cal/day per 1 lbs ?
any other factors or something wrong with the calculation?
Thank you so much for your comments
Andy
You can survive without eating for 4 weeks, 3 days is nothing.
Much more comfortable played at 0.75 speed. It's good though.
Such a well done video. Thank you so much for making this.
I've heard these same benefits touted by dozens of other voices around the web that I respect as well. I fasted for 45 hours the other week for the first time, and it was a great experience for me.
It seems like the verdict is out at this point that not-eating for a day or two is something everyone should do or at least consider. The only reason I can see for fasting not catching on is that nobody makes any money off of it with the exception of online health professionals/influencers; and the people that need fasting the most don't listen to them.
Will fasting help lower your blood pressure?
in 5 days nothing happens .. at best you feel weak.
I almost daily do 16 hour fasts. I've tried 48 hour fasts but my limit is 43 hours. I've lost 53 lbs with this and good food choices. Would recommend to many. Great video.
This sounds bad. I understand the principles, but this guy sounds like he's reading off a list, with no medical training. Ask him about his credentials to speak on such important measures.
Can i drink tea or just water? I am at 40h now i dont feel hunger, nothing but i drink tea… and thats maybe i feel nothing
I've pretty much only eaten a generous portion of dinner for most of my adult life. I am 54 years old and weigh exactly what I did when I graduated high school, 180 pounds at 5'11", I don't exorcise like I should so I've lost some tone in my muscles but for my age, compared to most my age I'm pretty fit just from eating once a day.
Did a 40 day water fast. Lost a grip of weight (45 lbs) once I started eating again I only gained back like 5-7lbs which is water weight, glycogen, fiber etc etc. No loose skin either.
This video has a lot of wrong info.