How Your Body Will Change During Weight Loss

by Rakib Sarwar, RPh
Published on February 5, 2020
woman using body tape measure while measuring her waist

Individuals aim to lose weight for many reasons focused on different aspects of a person’s health needs. A wide variety of research has shown an increase in obesity or too many overweight persons. Subsequently, because of overweight challenges, people become sickly and struggle to recover after serious illnesses.

Medical practitioners constantly warn people against weight problems. During weight loss, a person’s body changes. Many types of body change experiences form part of the article discussed below. Body changes during weight loss form part of complex processes and require an in-depth understanding. Diverse research opportunities compiled structured tests and outcomes related to weight loss. These research efforts play a significant role to understand body changes during weight loss.

What happens during weight loss?

Weight loss changes the body, the mind, and strength a person needs to take on daily challenges. If a person understands the meaning of body changes during weight loss, it results in focusing on what matters. Individuals who attempt to study the complexity of weight loss and body changes may less likely to feel disappointed. Many people focus on social or popular weight loss viewpoints. These ideas not supportive by medical research can cause individuals to follow incorrect weight loss methods.

Types of bodily changes

When a person attempts to lose weight, diverse bodily changes happen. Weight loss impacts the manner in which individual bodies adapt. Some types of bodily changes refer to the following (1):

Brain Function

If a person loses weight, their brain function operates more fluently. A person’s brain cells produce the necessary coding significantly faster. As a result, your memory loss decreases and concentration increases. Many types of research completed by diverse medical experts have described the changes in body cells. These changes improve a person’s brain function extensively.

Firmer Muscle

If a person loses weight, the muscle texture transforms. Overall fat tissue becomes reduced while the body changes and adapts during the process. Especially with less bad fat replaced by good muscle toning, it makes a person’s body look healthier. The interaction between good and dangerous fat plays an underlying role in the manner in which a person’s body stays healthy. First remember, initially weight loss entails a loss of fat and muscle. It becomes critical to maintain the body by combining the weight loss program with exercises.

Stronger Immune System 

When a person’s body adapts a healthier lifestyle, the immune system becomes stronger. It becomes important initially to ensure the intake of good supplements. At first, the body can “oppose” the effort to lose weight and a person may feel tired constantly. To overcome an excessive scenario, ensure the intake of relevant vitamins to upkeep your body health.

Faster Recovery

Weight loss ensures a healthy body with quicker recovery when needed. For example, in the event that a person experienced a heart attack, a healthy person can recover much faster. Depending on the medical history of the person, healthy weight loss may prevent people from experiencing serious illnesses.  

Bone Mass

During weight loss, bone mass transforms. Weight loss changes the bone mineral density of a person’s bone mass (7).

Apart from the bone mass changes, the cells renew themselves constantly. Researchers have shown that loss in bone mass can present a challenge during weight loss. The subsequent upkeep of the body during the event should form part of an improved nutrition program. Bones play a significant role in keeping your body and muscles together. It becomes critical to maintain the health of your bones by adding calcium intake for example.

Hormone Levels

 Studies showed a range of hormone level changes. Hormones influence the manner we feel and play a significant role during a weight loss program. Many women complained that they became extensively depressed during dieting. The advice provided by diet experts presented a check on estrogen levels during dieting. It becomes critical to understand the changes in your hormone’s experience and the influence on the rate a person loses weight (8).

What do the Medical Experts say?

A wide range of medical research undertaken by medical experts has displayed the seriousness of weight loss. Added to the investigations completed by researchers showed the need for society to drastically lose weight. Bodily changes experienced because of weight loss offer high-level changes comprising lessor cholesterol problems, management of diabetes and liver problems. Good healthy diets allow for control of blood pressure levels, respiratory challenges, and overall bodily operations.

According to medical experts, obesity increases yearly and over 1 billion people suffer from overweight. Because of obesity deaths increase to an average number of 300 000 deaths per year. Studies displayed bodily body composition changes and energy outflow. Research has highlighted that if people struggle with diabetes II and metabolic issues, a higher intake of protein may stimulate greater weight loss (5).

Various weight loss methods occur. For example, many people use alternative fasting day methods. According to medical experts, during a fast day, a person consumes 25% of energy requirements. Alternative fasting days present significant weight loss and bodily changes. A decrease between 5-6% in weight loss recorded and 5-7cm decrease in waist sizes presented a successful outcome by individuals. The diet takes between 8-12 weeks (2).

Lean Mass and Cardiovascular Status

The weight loss outcome offers bodily changes related to the maintenance of lean mass and improvements in cardiovascular status. Cardiovascular studies have formed part of key research projects to determine the connection between serious diseases and overweight individuals (5).

Weight Loss and Changes in Cell Activity

In addition, changes in brain activity, cells, and function progress into significant body changes (3). Our brain plays an intrinsic role in our daily survival. Constant cell production to replace dead cells forms part of the body processes. Weight loss may impact the manner in which our brains stay healthy and keep producing those cells humankind needs to operate. 

Reduction in Calorie Intake

According to health experts, other changes happen if a person follows a weight-loss program focused on reduced calorie intake. Calorie intake and weight loss go hand in hand. Many researchers have focused on the outcome of lesser calorie intake and subsequent body changes. The fewer calories a person takes, the more likely an individual may lose weight regularly.

Nutrition during Weight Loss

Many people who experienced weight loss complain about dizziness during the start. Because of the body changes, it may need some added Vitamin A, D, C or Iron to stay healthy. Change stays to be difficult in any person’s life and for the body. Bodily changes need some support from added nutrients. Key supplements required to support weight loss include calcium and protein intake. Supplement intake supports bodily changes and close nutrition shortages where required.

Weight Loss, Bodily Changes, and Crash Diets

When a person loses weight, the body initially experiences some shock. One should attempt to diet slowly and stay away from crash diets. If a body loses weight too quickly, it stores fat quicker. For a specific reason, if an individual attempts to starve the body, the system keeps fat longer. After completion of the crash diet, the body attempts to keep all fat possible. Consequently, one can easily pick up double the weight after completion of a crash diet.

Advantages of Losing Weight

Many advantages of bodily changes during weight loss allow a person to become healthier. Some advantages related to weight loss refer to the following (4):

  • Spend less time at the doctor. Individuals who follow a healthy lifestyle allocate less time to visit their medical doctors. It allows a person to feel healthy and happy
  • Body becoming more immune to diverse sicknesses. Stronger bodies allow for less likelihood of experiencing many illnesses
  • Opportunity for a person to feel more responsive and increase levels of focus
  • Significant increase in energy levels. Many people showed their experiences with increased activity levels because of weight loss. It provides an individual with the opportunity to uplift their daily lifestyle and progress to a more responsive level
  • People become more confident in themselves. Confidence allows a person to take on more challenges and experience diverse opportunities

Weight Loss and Recovery After Serious Illnesses

Achieving normal weight after a program results in a body becoming stronger to maintain good health. Excellent health conditions allow a person to recover after serious illnesses. Many studies have stipulated that bodies repair much quicker with normal weight persons (6).

Diverse studies have focused on weight loss, bodily changes, and the manner in which people recover. Evidence shown displayed lower-weight people recuperate significantly quicker than an overweight person.

The positive and negative changes your body will experience during weight loss

As much as we want to see our body change for the good after weight loss, we should compare all experiences. Weight loss can cause positive and negative experiences. Some positives related to weight loss include the following:

  • Physically, a person feels stronger and looks forward to taking on diverse tasks.
  • Mentally, one felt more confident and wanted to take part in diverse activities.
  • Positive emotions allow an individual to feel more motivated and become socially more adaptable.
  • Our bodies look healthier and as a result, we feel more confident to enjoy life.

On the other side of the coin, people who attempt to lose weight must understand the negatives of the scenario. Some challenges related to the following:

  • Initially, one feels depressed as the body needs to adapt and change to a new environment. Individuals expect miracles during weight loss. Genes can impact the rate a person’s body loses weight and changes.
  • You will feel hungry all the time. Originally, an individual may constantly feel for fast food. The body experiences feelings of starvation. Subsequently, the body keeps fat content, and a person struggles to lose weight.
  • Individuals may experience a delay in weight loss, depending on your body composition and DNA.
  • Initially, individuals can struggle with hair loss, breaking nails, and dry skin.

Key Things to Remember

One must remember to keep key matters in mind. For example, weight loss aligns with significant changes in a person’s body. These changes sometimes can offer disappointing outcomes.

A person needs to stay realistic and remember the complexity of a body. Body changes during weight loss may involve experiences a person struggles to accept. Sometimes, body changes result in other types of problems, for example, stretch marks. Besides weight loss, toning and exercising of the body stay critical.

Many body changes can present an opposite outlook than expected. It stays important to believe in the goals aligned with a supported medical diet. It prevents individuals from taking part in unrealistic weight loss goals related to body changes. 


Body changes extensively during weight loss and people should not underestimate the episode. It becomes important during dieting that a person understands the changes. It creates an adaptive environment for the body and mind. You should know that if a body changes too fast, it can present negative effects. It becomes critical to support your body during weight loss with the intake of added supplements.

Apart from becoming healthier, the body changes from the brain to the toe. Weight loss allows a person to look and feel happier. As a result, a person can fight any sicknesses that may come their way.

Body changes during weight loss present a complex scenario. During some instances, a person can easily lose weight with diverse body changes. Other times depending on body composition, the person may struggle to lose weight. It becomes important for all individuals to know bodies differ and weight loss experiences as well.

Keep in mind that body changes require time and crash diets may impact the longer-term body outlook. If the body changes too quickly as a result of weight loss, it can impact on the person’s health negatively. 

Body changes during weight loss align with an individual’s medical history, DNA and body composition. Exercise forms part of the weight loss process. Key medical research projects outline expectations aligned with body changes during weight loss.


  2. Varady K A et al., 2013, Alternate Day Fasting for Weight Loss in Normal Weight and Overweight Subjects, Nutritional Journal, Vol. 12:146, pp 1-8.
  3. Neseliler S et al., 2018, Neuro Cognitive and Hormonal Correlates of Voluntary Weight Loss in Humans, Journal of Stroke, Volume 29, pp 39-49.
  5. Kelleher J L et al., Self-Reported Body Weight Changes, 2019, Journal of Stroke and Cerebrovascular Diseases, Vol. 28, No. 5, pp 1317 – 1322.
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