When it comes to weight loss, one of the most common phrases is: "I have a slow metabolism, that's why I can't lose weight!"
But is it really true?!
Metabolism plays a crucial role in managing body weight, but it is not the only determining factor.
In this article, we’ll discuss what metabolism is, how it works, what it means to have a slow or fast metabolism, and which strategies can help speed it up to promote weight loss.
Because while metabolism matters, we can be in control of it!
What is metabolism?
Metabolism is the set of biochemical processes through which our body converts food into energy.
This complex system involves various organs, enzymes, and hormones and determines how much energy (= calories) we burn at rest and during daily activities.
It is divided into:
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Basal metabolism
The energy required to maintain vital functions (breathing, blood circulation, body temperature).
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Active metabolism
The energy consumed for physical and everyday activities.
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Thermogenesis (food-induced)
The energy used for digestion and nutrient absorption.
How does metabolism work and how does it affect body shape?
Metabolism regulates the number of calories burned each day and therefore directly impacts our ability to lose, maintain, or gain weight.
To put it simply: if your metabolism is faster, your body burns more calories; if your metabolism is slower, it burns fewer.
However, metabolic activity is not a fixed destiny: it can change over time and be influenced by factors such as age, genetics, muscle mass, diet, and physical activity.
Let’s take a closer look at what is meant by “fast metabolism,” “slow metabolism,” and why “basal metabolism” also comes into play.
Basal metabolism: the key to weight control
Basal Metabolic Rate (BMR) represents the minimum amount of energy needed to “survive,” that is, to keep vital functions active while at rest.
This value varies from person to person and is influenced by:
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age (it decreases over the years);
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muscle mass (more muscle = a faster metabolism);
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gender (men tend to have a higher BMR than women);
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genetics.
Calculating basal metabolism is essential for determining daily caloric needs and adopting an effective weight-loss strategy.
How to calculate your metabolism
Several formulas exist to calculate metabolism, but one of the most commonly used is the Mifflin-St Jeor equation, which varies by gender and age.
First, you need to calculate your Basal Metabolism (BMR), which corresponds to your daily caloric needs for vital functions.
Once you have your basal metabolism, you need to multiply that number by the appropriate activity factor based on your lifestyle (which obviously affects calorie expenditure).
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Sedentary lifestyle (little or no exercise, office job) → BMR x 1.2
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Lightly active lifestyle (exercise 1–3 days a week) → BMR x 1.375
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Moderately active lifestyle (exercise 3–5 days a week) → BMR x 1.55
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Very active lifestyle (exercise 6–7 days a week) → BMR x 1.725
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Extremely active lifestyle (exercise twice a day) → BMR x 1.9
This gives you an approximate estimate of your daily energy needs, expressed in kcal.
If you prefer, you can also use an online metabolic calculator.
Fast or slow metabolism: which is better for weight loss?
There is no such thing as a “perfect” metabolism, but a more active metabolism certainly helps burn more calories and makes weight loss easier.
We usually divide metabolism into two broad categories: fast metabolism and slow metabolism, to better understand different individual responses to diets and the different ways men and women often lose or gain weight, regardless of diet.
A fast metabolism is often determined by genetics and a high percentage of muscle mass.
People with a fast metabolism tend to:
But is fast metabolism something you are born with?
We could say yes, but there are still variables that influence it.
The main factors that can accelerate metabolism are maintaining a high level of muscle mass and regular physical activity, as well as a healthy thyroid, which supports proper hormonal regulation.
On the other hand, a slow metabolism can be caused by several factors, including age, a sedentary lifestyle, and possible hormonal imbalances.
People with a slow metabolism tend to:
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often feel tired and fatigued;
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gain weight more easily;
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struggle to lose weight despite following a low-calorie diet;
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often feel bloated;
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digest more slowly and with greater difficulty.
The main causes of a slow metabolism include:
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a sedentary lifestyle with little physical activity;
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loss of muscle mass;
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being constantly on a diet, that is, following strict or low-calorie diets for long periods;
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hormonal issues (hypothyroidism, insulin resistance).
So is there a way to reactivate and speed up metabolism to make weight loss easier?
How to unlock and reactivate metabolism for weight loss
If you have a slow metabolism, avoid overly restrictive diets, because—contrary to what you might think—eating too little actually slows metabolism down.
Increase physical activity and include weight training to build muscle mass.
Try to eat regular meals, because skipping meals can also slow metabolism.
Drink plenty of water, because proper hydration helps keep metabolism active.
Make sure you sleep well, because sleep affects hormonal regulation and therefore metabolism.
But let’s get even more practical…
How to speed up metabolism for weight loss
To stimulate metabolism and promote weight loss:
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do strength training (weights and HIIT workouts);
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increase your protein intake;
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drink green tea or coffee (in moderation);
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stay active throughout the day (avoid a sedentary lifestyle);
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take targeted supplements;
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take advantage of cosmetic treatments too!
Integrating these small changes into your body routine can have a big impact on your daily calorie expenditure.
Losing weight and reducing excess fat
To sum up, to lose weight in a healthy and sustainable way, it’s important to maintain a moderate calorie deficit (eat less than you burn, but without overdoing it), increase physical activity (alternating cardio and weights), avoid ultra-processed foods and refined sugars, eat regular, balanced meals and sleep at least 7–8 hours a night; but there’s also something else that can help!
To reactivate metabolism, you can take natural supplements that help speed up the process but—even though metabolism plays a key role in weight control—it is not the only factor that influences weight loss: your body treatments within your beauty routine matter too!
Here are some The Unique Form supplements that can help you lose weight!
Natural supplements to boost metabolism and fat burning

Lipo Slim Active is an innovative dietary supplement, formulated with a blend of plant extracts and carefully selected active ingredients to:
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support digestion, promoting balance in the gastrointestinal system.
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stimulate lipid metabolism, supporting healthy weight management.
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promote fluid drainage, helping reduce bloating and water retention.
Thanks to its synergistic action, Lipo Slim Active becomes an ideal ally for those who want to lose weight or maintain their body weight naturally.
It contains milk thistle, black blueberry, maté, choline, green coffee, centella, guarana, and artichoke, and just 5 ml a day are enough to start seeing results!

Caffè Slim is a dietary supplement whose formula supports fat metabolism, helping promote lipid metabolism and weight balance, supporting lipolysis, increasing energy levels, promoting fluid drainage and normal intestinal function.

MayDay Fame Stop is a natural dietary supplement that induces a feeling of fullness, reduces appetite and stimulates metabolism; it is based on Gymnema sylvestre and Griffonia.

Cioccolato Slim is a powdered dietary supplement formulated to support metabolism and provide a tonic boost for the body. Its composition is based on a blend of plant extracts rich in active ingredients: garcinia, green coffee, cocoa and reishi, each with specific properties for metabolic well-being and overall vitality.

Aloe Day Più is a powerful dietary supplement based on aloe vera, pineapple, vitamin C, potassium and magnesium, designed to support overall well-being and promote natural detox and drainage processes. With its refreshing lemon flavor, this supplement stands out for its concentrated formula, which offers numerous benefits for the body, including improved digestive function and support for the immune system.
Cosmetic products for weight loss
The slimming cosmetics by The Unique Form focus on reducing excess fat to firm, tone and reshape the silhouette.
Slimming wraps, shaping leggings and cosmetic clothing in general are excellent allies for weight loss without too much effort or to speed up results.
Also include in your daily routine:
And you’re all set!
But don’t forget, of course, about your NUTRITION as well!