Genomic slimming screening: How does the screening reveal obesity genes and what are its limitations?

Is obesity simply a result of diet and lack of exercise? Or can genetics play a role in weight gain and difficulty losing weight?

The truth is that Genes can influence a person's susceptibility to obesity.This is due to its impact on appetite and satiety, fat storage, energy regulation, and metabolism. However, in most cases, obesity is not caused by a single gene, but rather by the interaction of multiple genetic, environmental, and behavioral factors.

Is there really such a thing as genetic obesity?

Yes, there are rare cases known as Monogenetic obesityThis occurs as a result of genetic changes that directly affect appetite control pathways and energy balance.

These conditions often begin at a young age and may be accompanied by a very strong appetite or a constant feeling of hunger. In some cases, more than one family member may suffer from severe obesity.

There are also some genetic syndromes where obesity may be one of the symptoms, along with other symptoms such as certain growth, development, hormonal, or vision problems.

Does everyone who is obese need genetic testing?

Being overweight or obese alone does not mean a person needs genetic testing. In most cases of obesity, there is no single gene that can fully explain the condition, so routine genetic testing is not beneficial for everyone.

However, there are cases that make the doctor think more about the possibility of a genetic cause.

When should genetic testing be considered?

Genetic assessment becomes more important when obesity is present.

It started at a very early age, especially before the age of 5.

Unusually severe

Accompanied by excessive appetite or a strong and persistent feeling of hunger

It is present in several family members to a very high degree.

Accompanied by other symptoms that may indicate a genetic syndrome

Linked to a clear family history of severe obesity or certain genetic disorders

What can genetic analysis reveal?

The test may look for changes in genes associated with appetite and weight regulation, such as certain genes within the pathway MC4RIn addition to other genes linked to rare forms of obesity

Identifying the genetic cause, in appropriate cases, can help the physician better understand the underlying cause of obesity, assess risks, and choose a more suitable follow-up and treatment plan. For some types of genetic obesity, treatments targeting specific biological pathways exist, so reaching a diagnosis can also be therapeutically important.

Does difficulty losing weight mean the cause is genetic?

Not necessarily

Difficulty losing weight can occur for many reasons, including dietary habits, lack of activity, sleep, certain medications, hormonal and environmental factors, as well as genetic factors.

Therefore, difficulty losing weight alone cannot be relied upon to diagnose genetic obesity.

Is family history important?

Yes, but that doesn't automatically mean there's a gene mutation.

If a large number of family members suffer from severe obesity, especially if it started at a young age, it may be helpful to discuss the matter with a doctor specializing in endocrinology or genetics to determine if genetic testing is appropriate.

In some cases, knowing the family medical history, age of onset of obesity, severity of weight gain, and associated symptoms can help identify individuals who would benefit most from screening.

Summary

Obesity may have a genetic component, but not all obesity is genetic.

Not everyone who is overweight needs genetic testing. However, if obesity started at a very young age, is severe, is accompanied by excessive hunger, or there is a strong family history of severe obesity, then genetic testing may be necessary. Genetic evaluation is an important step in understanding the cause and developing a more accurate plan to manage the condition.
If you're wondering whether you or your child's condition warrants genetic testing, the best step is to have your medical and family history, as well as your symptoms, evaluated by a specialist before choosing the appropriate type of test.