We all worry about our weight sometimes, don't we? Some people want to lose weight, while others want to maintain a healthy weight. Have you ever thought that there is a little mechanism inside our bodies that helps us control our weight? Leptin is one such secret controller. Today, let's talk about leptin in a simple way that you can understand.
What is Leptin?
Simply put, leptin is a hormone produced by your body's fat cells, or adipose tissue . It's like a little signaling system that helps you control your weight over the long term. How does it do that? Leptin controls your hunger and also helps you feel full, or satiety .
Think of it this way: leptin is like a messenger that tells your brain how much fat you have in your body. Scientists only discovered leptin as recently as 1994. So there's still a lot of research going on, to understand exactly how it works. Leptin is already being investigated for its role in weight management, Alzheimer's disease , reproductive health, and infertility .
When you hear that leptin controls weight, you might think, "Oh... so I guess I should figure out a way to control leptin." But, to be honest, manipulating this hormone is not as easy as you think.
What actually happens with leptin?
Leptin's main function is to help you maintain your body weight. That is, it helps to create a long-term balance between the amount of food you eat and the amount of energy your body uses. Leptin prevents you from feeling hungry all the time. It also controls the hunger signals that come when the body doesn't need energy, or calories .
Leptin works primarily by affecting a part of your brain called the hypothalamus . The hypothalamus is a key center for controlling hunger and energy use. However, there are leptin receptors in other parts of the body as well.
The important thing is that leptin doesn't just control your hunger levels from one meal to the next. Instead, it helps to change your eating patterns over the long term, control your energy expenditure, and help you maintain your weight.
When you're trying to lose weight, leptin levels increase. How does that work? As your body loses fat, leptin levels decrease. This sends a signal to your body, saying, "Oh, I'm not eating enough, I'm hungry." This causes you to feel very hungry and have cravings. This can lead to you eating more than you should. That's why it can sometimes be difficult to maintain weight loss.
Scientists are still studying leptin. They believe it also affects:
- Your metabolism
- The endocrine system , that is, the hormonal system
- Immune system
How are leptin levels controlled?
Leptin is produced and released by your body's white adipose tissue, or white fat cells. These white fat cells are the main type of fat in our bodies.
Because leptin comes from fat cells, the amount of leptin in your blood is directly related to the amount of fat in your body. Simply put, if you have less body fat, you have less leptin. If you have more body fat, you have more leptin.
If your body fat mass increases over time, leptin levels increase. Conversely, if your body fat mass decreases, leptin levels decrease.
What happens if leptin levels increase?
A person with obesity may have very high levels of leptin in their body. This is called hyperleptinemia . When leptin increases in this way, a condition can occur in which the body does not respond to leptin. This is called leptin resistance .
Other conditions that may be associated with hyperleptinemia include:
- Depression
- Food addiction
- Neurodegenerative disorders
- Nonalcoholic fatty liver disease ( NAFLD )
- Rabson-Mendenhall syndrome
What is Leptin Resistance?
If you have leptin resistance, your brain doesn't respond to leptin normally. Even though leptin continues to send signals to your brain, you don't get the "full" feeling. As a result, you continue to eat, even though you have plenty of fat stores in your body.
Because of this apparent lack of leptin, your body thinks you're "starving." To conserve energy, your brain lowers your energy levels and reduces the number of calories you burn while you're at rest. This means your Basal Metabolic Rate (BMR) decreases.
So, leptin resistance makes you feel hungry all the time, and your BMR also decreases. This makes weight gain worse.
Scientists are currently trying to develop drugs that can treat leptin resistance.
Symptoms of leptin resistance
The main symptoms of leptin resistance are constant hunger, or hyperphagia , and increased food intake. These symptoms occur when you have excess body fat, possibly even excess fat.
However, these symptoms may be caused by many other factors, not just leptin resistance. As scientists are still learning about leptin, it is possible that more symptoms of leptin resistance will be discovered in the future.
What happens if you have Leptin Deficiency?
Leptin deficiency, also known as hypoleptinemia, is a very rare condition. The main condition associated with this is congenital leptin deficiency . This is a genetic condition that you are born with. This means that your adipose tissue is unable to make leptin.
When leptin is lost, your body thinks there is no fat in the body. This results in uncontrollable hunger and cravings. For this reason, young children with congenital leptin deficiency develop class III obesity and delayed puberty.
This condition is also associated with several other diseases:
- Dyslipidemia (an imbalance in fats, such as cholesterol and triglycerides)
- Fatty liver disease
- Frequent bacterial infections
- Hyperinsulinemia (excessive insulin production)
- Hypogonadotropic hypogonadism (low sex hormone levels)
How to check leptin levels?
A blood test can check your leptin levels. However, doctors don't usually check everyone's leptin levels. They only consider doing a leptin test in these situations:
- If your little one has grade 3 obesity
- If you are obese and constantly feel hungry
What are normal leptin levels?
Typically, leptin levels can range from:
- For women: 0.5 to 15.2 nanograms per milliliter ( 0.5 to 15.2 ng/mL )
- For men: 0.5 to 12.5 nanograms per milliliter ( 0.5 to 12.5 ng/mL )
However, these normal values can vary slightly from lab to lab. So, be sure to check the normal range on your test report, or ask your doctor if you have any questions about your results.
How can I increase my leptin levels?
In fact, there's not much you can do to increase your leptin levels to reduce hunger or appetite. That's because your leptin levels are directly related to the amount of adipose tissue you have in your body.
One study found that people who don't get enough sleep have higher levels of ghrelin (the hunger hormone) and lower levels of leptin. So, getting enough sleep can help keep your hormones in balance.
Scientists are also investigating the relationship between leptin and triglycerides (also a type of fat called a lipid). Some studies have shown that high triglyceride levels affect the way leptin works. But there are mixed opinions about these studies. Some scientists believe that a diet designed to lower triglycerides can help increase leptin levels, but others disagree.
What foods are high in leptin?
Leptin is a hormone that your body makes, not a nutrient like vitamin C or protein. Therefore, no food contains leptin.
Because leptin is a relatively new discovery, scientists are still learning more about it, especially how it affects obesity and weight loss. When your body fat is low, it can be difficult to lose weight because leptin's role in activating the body's "hunger" signal.
Take-Home Message
Okay, so from what we've talked about leptin, you can remember this:
- Leptin is a hormone produced by your fat cells .
- The main thing about this is that it helps you control your weight in the long run and gives you the feeling of "fullness" .
- When your body fat increases, leptin levels increase , and when your body fat decreases, leptin levels decrease.
- Leptin resistance is when the body has leptin but the brain doesn't respond to it properly. This can lead to weight gain.
- Leptin deficiency is very rare .
- No food contains leptin, because it is produced within the body.
- A healthy lifestyle, especially getting good sleep , can help balance hormones.
If you're concerned about your weight or need advice on how to lose weight healthily, talk to your doctor. You can also see a doctor who specializes in hormones, an endocrinologist, to discuss weight management programs. The most important thing is to take care of your health first.
` Leptin, weight control, hormones, obesity, leptin resistance, hunger, satiety
💬 අදහස් (0)
තවමත් කිසිදු අදහසක් පළ කර නොමැත. ඔබේ අදහස පළමු වරට මෙහි එක් කරන්න.
ඔබේ අදහස එක් කරන්න