Are Weight Loss And Fat Loss The Same?

Updated on May 7, 2026

Being overweight or obese are not caused by ONE single factor.

“An overweight person is often viewed as lacking the discipline and willpower to ‘eat less and exercise more’. In reality, weight loss is a complicated issue. The weight gain that leads to obesity is often a chronic, relapsing disorder due to multiple factors like genetics, behavioural, psychological, environmental, medical, etc,” explains Dr Ivan Puah, who also holds a Graduate Diploma in Sports Medicine.

While an individual’s effort is critical in weight management, other factors include family, social, health services and public policy.

A strong, supportive unit is essential for someone on a weight loss journey.

Weight gain & loss

Weight gain occurs when you consume more calories than you burn, leading to an accumulation of excess energy stored as fat.

This excess fat is stored within fat cells, either by enlarging the existing cells or creating new ones.

Several factors contribute to unintentional weight gain, including poor sleep, a sedentary lifestyle, and the consumption of processed or sugary foods.

However, adopting mindful eating habits, engaging in regular exercise, and focusing on whole foods can help you achieve your weight-loss goals and improve your overall health

While lifestyle factors play a significant role in weight gain, certain medical conditions can also contribute to the problem.

If you have been following a nutritious diet and exercising regularly but still struggle to lose weight, it may be worth consulting a healthcare professional to rule out any underlying medical conditions.

What Happens When We Lose Weight?

Tightly regulated by complex systems, our body’s fat cells store excess energy for survival. Under normal, stable circumstances, the body regulates metabolic responses to maintain a stable weight, just as it regulates body temperature or blood pressure.

Dr Puah shares, “It is believed that the body appears to have a ‘set point’ for body weight. Any deviation triggers a compensatory response in the opposite direction to restore the ‘set point’. For example, in response to weight loss, energy expenditure is reduced accordingly to resist further loss. This allows the ‘set point’ to be restored. Weight regain after weight loss may be a physiological response rather than a failure of conscious effort.”

For some individuals, the resistance to weight loss can persist for years despite efforts to lose weight. This, unfortunately, predisposes them to excessive weight gain in the future.

What happens when you've lost the weight, but your body doesn't yet reflect the effort you have put in?

This is a common and frustrating concern. Even after achieving significant weight loss, many are left with stubborn, diet-resistant fat around the abdomen, thighs, or back.

This is where the art of body contouring with liposuction begins.

For those who have already done the hard work and seek to refine their physique, this surgical procedure removes those last pockets of stubborn fat, sculpting a more defined and proportionate shape.

Can liposuction be used for weight loss?

“This is the most common question I’ve been asked. Liposuction targets fat volume and not scale weight. Fat is surprisingly light, thus, removing even a significant volume of fat may only result in a minimal change on the weighing scale. The primary goal of liposuction is to reshape specific stubborn areas, not to lower your overall body weight,”explains Dr Puah.

Liposuction mechanically removes a finite number of fat cells from specific areas, but it does not change your metabolism, your hormones, or your body's fundamental set point.

Without a sustainable lifestyle, any remaining fat cells in untreated areas can still expand, leading to weight gain.

Fat gain & loss

Fat gain refers to the increase in the size and number of fat cells within the body.

The number of fat cells tends to stabilise during adolescence and adulthood unless significant weight fluctuations occur.

Consuming excessive calories over a prolonged period can cause the existing fat cells to expand and new ones to develop.

These enlarged fat cells become insulin-resistant, increasing the risk of Type II diabetes and cardiovascular disease.

Fat tends to accumulate primarily as subcutaneous fat, which is the fat located just beneath the skin’s surface around the waist, hips, upper back, buttocks, and thighs.

Excessive subcutaneous fat may pose health risks, but to a lesser extent than visceral fat.

Your body has a genetically predetermined "fat map"

A "fat map" dictates where it prefers to store and lose fat.

For many, especially women, areas like the hips and thighs are alpha-2 receptor-dense zones ^[1]. Think of these receptors as "fat storage locks." Estrogen makes these areas particularly “efficient” at holding onto fat as a reserved energy source for potential pregnancy and breastfeeding.

Now, during weight loss, your body will be more readily burning fat from other areas with fewer of these "locks" before it even begins to tackle these stubborn, genetically programmed sites.

So, what is an effective and permanent solution? Liposuction.

Liposuction, a body contouring procedure is designed to refine and correct disproportionate body shape ^[2].

It is meant for individuals who are at or near their ideal body weight but struggle with localised, diet-resistant fat deposits, like stubborn pockets on the abdomen, thighs, or flanks.

Does GLP-1 medication help with fat and weight loss?

GLP-1 medications are effective for weight AND fat loss, often leading to a 10-15% weight loss over 12 to 18 months, especially when combined with lifestyle changes ^[3].

These medications work by slowing digestion, controlling appetite, and increasing feelings of fullness.

They reduce fat, including harmful visceral fat, but can also result in some loss of lean muscle mass if not used under a doctor's supervision.

Reference

1. Garenc C, Pérusse L, Chagnon YC, Rankinen T, Gagnon J, Borecki IB, Leon AS, Skinner JS, Wilmore JH, Rao DC, Bouchard C. The alpha 2-adrenergic receptor gene and body fat content and distribution: the HERITAGE Family Study. Mol Med. 2002 Feb;8(2):88-94. PMID: 12080184; PMCID: PMC2039973.
2. Bartow MJ, Szymanski KD, Raggio BS. Liposuction. [Updated 2025 Jul 7]. In: StatPearls [Internet]. Treasure Island (FL): StatPearls Publishing; 2025 Jan-. Available from: https://www.ncbi.nlm.nih.gov/books/NBK563135/
3. Richards JR, Khalsa SS. Highway to the danger zone? A cautionary account that GLP-1 receptor agonists may be too effective for unmonitored weight loss. Obes Rev. 2024 May;25(5):e13709. doi: 10.1111/obr.13709. Epub 2024 Feb 6. PMID: 38320760; PMCID: PMC11144546.
4. Tsai AC, Sandretto A, Chung YC. Dieting is more effective in reducing weight but exercise is more effective in reducing fat during the early phase of a weight-reducing program in healthy humans. J Nutr Biochem. 2003 Sep;14(9):541-9. doi: 10.1016/s0955-2863(03)00105-0. PMID: 14505816.