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That’s what happens to your fat cells when you put on weight

If you’re overweight or have developed a paunch, you’re probably suffering from chronic inflammation of your adipose tissue. This is a silent pathological process which sooner or later will become a ticking time bomb, so it makes sense to read up on the latest findings and take action fast.

Fat cells (adipocytes) under the microscope
If you’re overweight or have developed a paunch, you’re probably suffering from chronic inflammation of your adipose tissue. This is a silent pathological process which sooner or later will become a ticking time bomb, so it makes sense to read up on the latest findings and take action fast.

What happens when you put on weight?

Gaining weight is an entirely natural process – it’s the means by which energy which is surplus to immediate requirements is stored for future use. In this way, there is never any waste and the body is able to survive periods of food scarcity without difficulty. Unfortunately, what was a blessing for our ancestors has turned into a veritable curse in today’s affluent societies. Decreased levels of physical activity, an abundance of foodstuffs and the calorific nature of that food have all interfered with this mechanism and led to an epidemic of excess weight.

When a person becomes overweight, it’s because their calorie intake has exceeded their energy output for a certain period of time: the surplus energy has therefore been stored in specialized cells called adipocytes. It is these cells which primarily make up adipose tissue, the soft tissue responsible for unsightly bulges. Energy reserves are stored in the form of lipids: they penetrate the adipocytes which inflate like balloons as the fats accumulate.

If the calorie/energy imbalance persists, the adipose tissue continues to expand, forcing the body to recruit yet more fat cells and to reconfigure blood flow pathways in order to feed them properly. But if the adipocytes grow too large, they end up becoming oxygen-deficient and they suffocate: the blood vessels are no longer able to reach them and the oxygen diffusion distance may be exceeded (2-3).

This lack of oxygen, or hypoxia, creates chaos in adipose tissue.

  • It causes chronic inflammation of adipose tissue.
    This same inflammation travels towards the bloodstream where it can be measured using a specific test. With it comes a massive infiltration of macrophages. These primitive immune cells are attracted by certain cytokines (especially MCP-1) secreted by the suffocating adipocytes.
  • It results in the formation of collagen deposits which trap the adipocytes.
    Inflammation of adipose tissue is accompanied by deposits of type VI collagen which make the tissue stiff and fibrous (4-5). Fibrous bands form in the extracellular milieu which prevents the adipocytes from expanding and storing more excess lipids. They are instead redirected towards vital organs such as the liver, muscles and heart, so increasing the accumulation of fat deposits in undesirable places. And it is precisely this redirection of fats which is responsible for many health problems including cardiovascular disorders, resistance to the pancreatic hormone, type 2 diabetes and hepatic steatosis (fatty liver) (6).
  • It makes losing weight more difficult. As has been shown in several studies, the more a person’s fatty tissue has been subject to fibrosis, the harder they will find it to lose weight. Which is why this pathological process may well turn out to be a potential target in the treatment of obesity (7-8)!
The process is a vicious circle: the decrease in blood flow to fatty tissue affected by fibrosis can lead to necrosis of fat cells which attracts other macrophages and further increases inflammation levels (9). In the end, fatty tissue cells grow close to a worrying state of senescence.

How do you know if your body fat is normal?

According to scientists, fibrosis of fatty tissue does not just occur in obese individuals. It can also develop in slim people with very little fat under the skin, but who have a ‘potbelly’ or are ‘apple-shaped’. In such individuals, fat is deposited in the abdominal area, in the innermost layers of the stomach around the internal organs. This particular pattern of fat accumulation is especially dangerous to health.

Fat is deposited at several main sites in the body: subcutaneous tissue, visceral tissue, around the hips and around organs such as the heart and kidneys. Each of these types of fat deposit has a specific hormonal profile, ie, they do not all secrete the same messengers and do not, therefore, lead to the same consequences if the deposits get bigger or become problematic. For example, fat deposited in subcutaneous tissue does not appear to be linked to obesity, whereas that deposited in visceral tissue seems to be particularly vulnerable to fibrosis (10).

How do you know if you should be worried about your abdominal fatty tissue? To be certain, you’d need to measure your inflammation levels and identify whether or not fibrosis has taken place. A simpler guide is whether or not you feel too fat in the abdominal area, although this is not necessarily indicative, since slim people can be affected while obese individuals remain ‘metabolically healthy’ (11). How you feel, what your body’s telling you, whether you’re suffering from inflammation problems or fatigue and if you’re finding it difficult to lose weight (even if you’re not significantly overweight) are all vital clues.

What happens if you do nothing?

It should be stressed that fatty tissue is not simply a facility for storing fat: it’s an organ which secretes numerous chemical messengers (in particular, leptin and adiponectin) which have a direct effect on the body as a whole - the immune response, blood pressure, haemostasis, regulation of bone mass, food intake, functions controlled by the thyroid and even reproduction. In other words, if your fatty tissue has been affected by fibrosis, it’s your whole body that suffers.

It therefore requires urgent action in order to prevent the threat of type 2 diabetes or atherosclerosis. The longer you wait, the more likely it is that fibrosis will develop and cause overall degeneration of tissue. Following are five steps to consider right now if you want to reduce your fatty tissue and inflammation levels:

  • Physical activity is the crucial element in getting rid of visceral fat. It is essential for increasing and maintaining muscle mass which is often greatly diminished.
  • Several studies have shown that secretion of the hormone cortisol (excess levels of which are produced in chronic stress) is associated with an increase in abdominal fat (12). It’s therefore important to do all you can to take time to relax and try to achieve greater serenity in your life.
  • The recruitment of fat cells is exacerbated by dietary factors such as an unbalanced intake of omega-6 and omega-3 fatty acids. So ensure you lower your intake of omega-6 (found in a great many processed foods) and increase that of omega-3 (an excellent source being Super DHA).
  • Achieving weight loss inevitably means eating a lower-calorie diet. It’s therefore important to ‘stay the course’ and to use complementary strategies, be they psychological or nutritional, to help you do so (for example, taking natural-source appetite-suppressants, such as Appetite Control Formula or CSAT).
  • Consider products specifically formulated to inhibit the formation of fat cells such as Adipromin® or those designed to get rid of visceral fat such as Advanced Fat Burner. Remember that probiotics can help in addressing excess weight and inflammation. Research has shown that gut flora plays a key role in controlling visceral fat and inflammation: bacterial strains such as Lactobacillus gasseri and Lactobacillus reuteri can help fight inflammation and excess weight.
Don’t forget: allowing yourself to gain weight means maintaining a state of inflammation which will inevitably lead to health problems and will sooner or later become irreversible.



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  2. Ye J, Gao Z, Yin J, He Q 2007. Hypoxia is a potential risk factor for chronic inflammation and adiponectin reduction in adipose tissue of ob/ob and dietary obese mice. Am J Physiol 293: E1118–E1128 doi: 10.1152/ajpendo.00435.2007
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