How Intermittent Fasting Affects Testosterone

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There are various motivations for men to strive for higher testosterone levels. People strive to increase their testosterone level primarily in order to boost their libido and excitement for sex.

There are various methods to augment your testosterone levels; however, some of them come with potential hazards. Using hormonal therapy or supplementation can upset the balance of hormones in your body, resulting in undesired effects.

If you are not interested in using sex pills, it might be worth considering intermittent fasting as an alternative.

The last few years have seen a surge in enthusiasm for the practice of intermittent fasting. Periodic fasting – where you set aside a period of time each day where you don’t eat – has demonstrated advantageous outcomes for weight reduction and overall health. It is said that intermittent fasting can potentially lead to improvements in testosterone and libido.

What effect would alter your diet have on your libido? What are the other intermittent fasting results? What is the concept of intermittent fasting, and what effects does it have on the body? In this article, we aim to provide answers to these queries.

What Is Intermittent Fasting

Someone who was raised in a culture of the developed world, in which eating three meals a day is the norm, may find the thought of intermitting fasting unusual. Many people consume more than their regular meals, usually snacking in between them.

People in other parts of the world would find our eating habits to be peculiar. Studies are starting to show that the body works better when it isn’t constantly being fed. No matter the conclusions of any studies, there is without a doubt that there are considerable issues with overeating in a lot of the highly developed countries, particularly the United States.

Intermittent fasting is a dietary regimen that entails limited food intake. In a lot of areas around the world, regularly taking breaks from eating during certain times is not even viewed as a dieting regimen – it is how meals are commonly consumed. In first world nations, fasting intermittently is generally accepted as a type of dieting in which people refrain from eating for a duration ranging from 12 to 48 hours.

Between the intervals of not eating, people can eat whatever they choose. Intermittent fasting can be seen more in terms of when one is allowed to eat, not necessarily what they are consuming. You could choose to do intermittent fasting and consume unhealthy food in between your fasting periods, but why would you opt for that option?

The 16/8 cycle is a widely used form of intermittent fasting. During this time period, fasting is performed for 16 hours of the day. For the following 8 hours, they are allowed to consume whatever foods they desire. One of the most basic methods of accomplishing this is to go without eating twice within the day.

During a period of fasting, it is essential to abstain from calories as well as any form of solid food that requires the body to expend energy for digestion. Depending on what you prefer, you may want to include drinks that don’t contain calories such as tea or coffee – however, it’s known that the caffeine in these drinks can influence metabolic rate, so you may want to avoid them.

Intermittent Fasting and Testosterone

Besides changing your eating habits, incorporating strength building exercise, and getting plenty of rest, intermittent fasting may be another activity to take up. It is possible that limiting the amount of time one eats and adhering to a fasting schedule could boost one’s testosterone levels.

Scientific studies have demonstrated that fasting for a brief period of time can be effective in elevating the levels of Luteinizing Hormone (LH), which has a role in stimulating the production of testosterone. A research performed on overweight males showed that after 56 hours, levels of luteinizing hormone had risen by 67%.

A different research observed a 26 percent jump in GNHR (Gonadotropin-releasing hormone), a hormone that encourages testosterone production, amongst hefty males. A research study found that males who were engaged in exercise saw a dramatic rise in Gonadotropin-Releasing Hormone, which resulted in a threefold increase in testosterone.

The opposite of testosterone is cortisol, a hormone that has a destructive effect on muscle tissue. Testosterone and cortisol have contrasting effects on dominant behavior and the fight or flight systems; when cortisol is elevated, testosterone levels drop, while testosterone is heightened when cortisol levels are low.

If you undergo a frequent fasting schedule that is overly strenuous or if your cortisol levels are always too high, your testosterone will lower. You should do it periodically and make sure you are getting the right nutrients.

How Does Fasting Affect Testosterone

A study revealed that after 2 days of fasting, the testosterone level dropped from 8.7 mcg/l to 5.7 mcg/l and the LH amount decreased from 6.9 to 5.0 U/l in 10 males who were in good health. The effects of the reduction were offset with little amounts of sugar ingested contained in a liquid form over the course of a two day and two night fasting period.

After an overnight fast and 56 hours of not eating, six extra-ordinary men were administered 50 mcg of GnRH via an intravenous treatment. Testosterone did not rise after a period of not eating overnight, but the hormone GnRH did cause a 55% increase (plus or minus 14%) in testosterone after not eating for 56 hours. Additionally, fasting amplified the LH growth caused by GnRH by an average of 64% with a range of 15%.

For eight weeks, 34 men who were already accustomed to resistance training either maintained their regular eating schedule of 12 hours per day or followed a 16/8 fasting window with eight hours of eating. There was a reduction in body fat among the group that was limited in time, compared to the ordinary group, yet their testosterone and IGF-1 concentrations also dropped. Both teams held on to their muscle bulk and power as well as the amount of energy that was used at rest.

Obese men who go on a fast for 10 days experience reduced levels of serum testosterone, FSH, and a blunted level of responsiveness to FSH from the pituitary. Additionally, there is an increase in urinary excretion of both LH and FSH. All subjects lost 4.1% of their total body weight.

Fasts that go on for a longer period than 3 days will have the outcome of decreasing testosterone levels, as the body enters a state of catabolism. But I still believe that short-term fasting is all right and can even incrementally increase one’s receptivity to hormones such as LH (Luteinizing Hormone) and GnRH (Gonadotropin-Releasing Hormone).

Intermittent Fasting Testosterone Benefits – Does It Really Work?

How does intermittent fasting affect testosterone levels when it is combined with an exercise program? The Joe Rogan discussion on intermittent fasting provided us with some understanding of the topic, yet it has left us with a lot of unanswered queries.

Investigating the relationship between irregular fasting and testosterone is the only way to get an accurate understanding. Many individuals claim that fasting at intervals increases their level of testosterone, however unless they regularly inspect their hormone readings it may be difficult to determine if this is correct.

A number of controlled studies have been conducted on the subject of intermittent fasting and its effects on testosterone levels. The results, however, have been mixed.

An experiment conducted with rodents showed that intermittent fasting did lead to an increase in testosterone levels. Despite the fact that experiments on animals are oftentimes not applicable to humans, rat studies are still commonly held as the standard prior to human trials being conducted.

Research has presented evidence that shows that intermittent fasting can only have positive effects on testosterone levels in the immediate future. A study demonstrated that after just three days of intermittent fasting, males began to experience a decline in their T hormone levels.

A further study presented evidence that men who abstained from food for up to 84 hours exhibited a drop in their levels of luteinizing hormone (LH). If LH is not produced, it will lead to a reduction in testosterone levels since it serves as the building block for the hormone.

It is certain that more research needs to be conducted in this area. Gaining knowledge about why fasting has an impact on testosterone levels is useful.

Does Fasting Lower Testosterone

It is essential to distinguish the point at which your testosterone level decreases while fasting and its effects afterward. It is likely that if you test your testosterone levels when you have not eaten, the outcome will be lower than if you had just had a large meal such as steak and potatoes. Levels of cortisol tend to be higher in the mornings compared to other times of the day, and most blood tests need to be performed while the patient is in a state of fasting.

Periodic fasting can stimulate an environment that supports muscle building and fat burning provided that it is not too overwhelming. If you put yourself through a rigorous schedule of fasting for three days, eating a restricted diet, working out intensely, sleeping very little, doing cardio exercises frequently, having a job that causes a lot of stress, arguing with your partner, and drinking alcohol, it is clear that your level of testosterone will be extremely low. On the other hand, if fasting aids in improving your physical shape, causes fat to be shed away, and diminishes worry and tension, then it can actually benefit your hormones.

The most important factor is to fast more intensely and maximize the other components of your lifestyle such as exercising, getting enough sleep, and eating healthy. Generally, the fall in the level of testosterone due to not eating is caused by inadequate sleep, exercise to excess, particularly when fasting and not taking in enough calories.

Insulin and Testosterone

The relationship between testosterone and glucose uptake is very close, as testosterone aids in the use and uptake of glucose. Insulin assists in the creation of testosterone by transporting nutrients to the cells, while reduced insulin sensitivity has been linked to having low testosterone levels.

The importance of timing meals and the way nutrients are divided is significantly crucial for producing and maintaining hormones at peak levels.

If you are consuming an excessive amount of carbohydrates regularly or if you remain on a ketogenic diet beyond a certain point, it can impair your insulin sensitivity directly and has a knock-on effect on your testosterone levels.

Alternating fasting combined with weight training is one of the most effectual means of increasing insulin sensitivity as long as cortisol is not overproduced.

It is beneficial to have a moderate amount of both insulin and testosterone; having either too much or too little of either is not advised. Having continuously high levels of insulin for long periods of time will lead to your body becoming less and less sensitive to the effects of insulin. This is why fasting for short intervals and breaking down muscles can expand improved rebuilding and restoration when it is finished.

Research has revealed that engaging in fasting results in a higher frequency of spikes of growth hormone throughout the day than when a normal eating schedule is followed. Your body produces increased amounts of growth hormone while fasting as a way of shielding itself from inadequate energy intake. Growth hormone levels skyrocket by as much as 2000-3000% after twenty-four hours of fasting.

Consuming food and subsequent insulin release inhibit the production of growth hormone, thus snacking less and decreasing meal quantity may lead to heightened growth hormone levels. GH won’t result in an increase in muscle mass, however, it can be beneficial in aiding with weight loss and strengthening bones.

How to Avoid Low Testosterone From Fasting

To prevent testosterone from falling during fasting, make sure you supply your body with enough protein to build muscle, get plenty of healthy fats as monounsaturated and saturated fats substantially elevate testosterone levels more so than polyunsaturated fats, and don’t remain with a low-carb food regime for too long. It is okay to do brief ketogenic diets or extend fasting, but doing it regularly should be avoided.

If you have been fasting, it is likely beneficial for you to consume additional carbohydrates. This will help to reduce the cortisol hormones in your body due to carbohydrates and insulin when coming from a fast. In contrast, if fasting is not part of your routine, the ketogenic diet should work out as long as you keep your fasting window short, as this will help control cortisol levels when consuming low carbohydrate foods. A longer fast such as 3 days or One Meal a Day (OMAD) daily would benefit from the presence of some carbohydrates, possibly to move up testosterone levels, as well as to boost leptin and increase the metabolic rate.

Effective Methods of Intermittent Fasting

You can begin an intermittent fasting schedule in various ways. Here are some of the most popular.

  • The 16/8 method. This is probably the most popular way to do intermittent fasting. You don’t eat for 16 hours. Then, during the next 8 hours, you can eat whatever you want. This method is pretty easy for most people to work with.
  • The 5/2 method. This is a more intensive method. For 5 days out of the week, you will eat normally, and for 2 days you will eat nothing. You can split the 2 fasting days up or have them consecutively.
  • The Warrior Diet. The warrior diet generally just asks that people stick to foods that they feel their instincts drive them towards. However, many people have adopted this diet plan to involve fasting for most of the day and eating one large meal during the evening time.

No matter the type of intermittent fasting regimen you are following, ensure that the food you consume is nutritious and nutritionally dense. Include a variety of fruits and veggies, good sources of protein, whole grains, and beans in your diet.


The utilization of intermittent fasting has grown to be more and more favored in recent years. Evidence is there that it can help reduce body weight, improve general wellbeing, and even elevate testosterone levels and libido.

There are various approaches to initiating an intermittent fasting program. I hope this article has aided you in selecting the plan that best suits you.


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