Healthy Eating vs Restrictive Diets: What Is Better for Weight Loss?
Written by Mariia Roza
Mariia Roza is a weight loss and fitness writer at Unimeal. She is an expert in nutrition, wellness, longevity, and sports.
Medically reviewed by Dr. Olena Avdiievska, MD, RDN
Dr. Olena Avdiievska is a nutritional and medical expert at Unimeal. She is an MD and RDN in Dietology and nutrition and a university professor with 76 scientific publications.
A properly selected nutrition makes it possible to reduce weight, improve well-being and cleanse the body of toxins. However, balanced eating isn't always a restrictive diet. There are many other ways to cut your weight without starvation. Let's find out more together!
A restrictive diet is something like a magic spell: Many of us believe that this is a solution to all of our weight problems. If you can just cut out certain foods, the fat will melt away immediately, and you’ll have your dream body for the rest of your life.
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However, most certified doctors and nutrition specialists agree that what really improves public health is the combination of healthy balanced eating and proper physical activity. Whom should you believe: Instagram influencers with their own celebrity diets or scientifically proven balanced approaches?
The thing is, an unbalanced yet restricted diet can be just as bad for your health as gorging yourself on low-quality fast food for breakfast, lunch, and dinner. Diets that look good on the surface might prove detrimental to your health in the long term. They are called fad diets1Ruden D. M., Rasouli P., Lu X. (2007, June). Potential Long-Term Consequences of Fad Diets on Health, Cancer, and Longevity: Lessons Learned from Model Organism Studies. Technology in Cancer Research and Treatment. DOI:10.1177/153303460700600312.
Fad diets—a ticking time bomb
Restrictive diets are based on a calorie deficit2Stasser B., Spreitzer A., Haber P. (2007, November 20). Fat Loss Depends on Energy Deficit Only, Independently of the Method for Weight Loss. Annals of Nutrition and Metabolism. DOI:10.1159/000111162 that allows you to lose weight as quickly as possible. More balanced versions of fat-loss diets and healthy meal plans pay attention to the needs of your body in both energy (calories), macronutrients (carbs, proteins, and fats), and micronutrients (vitamins, minerals). On the other hand, many fad diets disregard the benefits of balanced eating for health and focus only on burning fat.
You’ll see this approach in many diets that remove entirely different types of food or categories of macronutrients. For example, on a carnivore diet3O’Hearn A. (2020, October). Can a Carnivore Diet Provide All Essential Nutrients? Current Opinion in Endocrinology, Diabetes, and Obesity. DOI:10.1097/med.0000000000000576, you can eat only meat. On a ketogenic diet4Martin-McGill K. J., Lambert B., Whiteley V. J., et al. (2019, June). Understanding the Core Principles of a “Modified Ketogenic Diet”: The UK and Ireland Perspective. Journal of Human Nutrition and Dietetics. DOI:10.1111/jhn.12637, you should restrict your carbs intake to 50 grams per day (for reference, one apple contains 25 grams of carbs). Some crash diets offer you to reduce your calorie intake by half, which is sometimes insufficient even to cover your basal metabolic needs5Henry C. J. K. (2005, October). Basal metabolic rate studies in humans: measurement and development of new equations. Public Health Nutrition. DOI:10.1079/phn2005801.
Reasons behind the weight-loss rebound
While overly restrictive diets can lead to a loss of weight (with particularly notable results at the beginning), their results are unsustainable. These diets cannot be maintained for extended periods for a variety of reasons.
The reason behind gaining back the weight you’ve lost with the extreme or unbalanced diet is the weight-loss rebound6Hall K. D., Kahan S. (2019, January 1). Maintenance of Lost Weight and Long-Term Management of Obesity. Medical Clinics of North America. DOI:10.1016/j.mcna.2017.08.012 effect. Many people who attempt these diets not only regain the weight they’ve lost, they can even gain additional pounds on top of that. This happens because of two main reasons.
First of all, your metabolic rate slows down. This phenomenon is known as metabolic adaptation7Hall K. D. (2018, April 10). Metabolic Adaptations to Weight Loss. Obesity (Silver Spring). DOI:10.1002/oby.22189. It was described by multiple studies, including the case study of the Biggest Loser participants who had a lower metabolic rate even six years after the TV competition.
The second reason is the higher levels of the hunger hormone. Ghrelin level is almost 20% higher8Cummings D. E., Weigle D. S., Frayo R. S., et al. (2002, May 23). Plasma Ghrelin Levels after Diet-Induced Weight Loss or Gastric Bypass Surgery. The New England Journal of Medicine. DOI:10.1056/nejmoa012908 among people who’ve lost weight with the help of restrictive diets. So, the reason behind gaining weight back is not the lack of willpower but how your body reacts to heavy restrictions in food.
Side effects of overly restrictive diets
Along with the yo-yo effect that usually follows severe calorie restriction, extremely fast and drastic weight loss can lead to health problems. Centers for Disease Control and Prevention guidelines state that the healthiest speed of weight loss is 1-2 pounds or 0.45-0.9 kg per week. A much faster weight loss can have multiple side effects, and these are only some of them:
- Dehydration
- Fatigue
- Headaches
- Irritability
- Dizziness
- Constipation
- Gallstones and gallbladder problems
- Muscle loss
- Hair loss
- Electrolytes deficiency
- Irregular menstruation
- Malnutrition
Malnutrition and chronic malnutrition, in the long run, can seriously damage your health. In some cases, it can even be life-threatening. As on excessively restrictive diets, your body is running on empty and constantly low in energy. This leads to the degradation of your immune system, leaving you susceptible to infectious diseases or chronic conditions becoming acute.
Good nutrition—a sensible answer
Confronting these fad diets are balanced meal plans. A nutrition plan that provides the body with the vitamins, minerals, nutrients, and calories it needs is a safer, healthier, and more efficient weight-loss option in the long run. Choose diets that include a vast amount of fruit and vegetables, lean proteins, grains, and healthy oils. Rather than blacklisting foods from your plate, balanced nutrition plans will focus on portion sizes and merely reduce the consumption of less nutritious or highly processed foods.
Summing up
It is entirely possible to lose weight through a well-balanced nutrition plan. It is a much safer option when compared to crash diets. Healthy eating with a slight calorie deficit provides gradual, sustainable weight loss, just as healthcare specialists recommend. By choosing slower and steadier fat loss, you can also manage your health problems, keep your immune system strong and maintain a good energy level to help you stay positive and happy overall.
A diet should encourage you, gently pushing you in the right direction. It shouldn’t be a punishment that deteriorates your mental or physical wellbeing. Keep your eating balanced, and you will enjoy your favorite meals, explore new foods, and let your health improve along with your figure.
Unimeal does not diagnose or suggest treatments. Any description of the diet, training plan or supplement should be discussed with your current physician or nutritionist. This article does not address specific conditions and is simply meant to provide general information on healthcare topics. Following any advice is at your own initiative and does not impose any responsibility on the blog authors for your health and safety.
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