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Carb cycling

Overview, benefits, example menu, and tips

Dive into carb cycling: a strategic diet for weight loss and improved performance. Learn the benefits and how to effectively use carbohydrates for better health.

This article is based on scientific evidence, written by experts, and fact-checked by experts.
We look at both sides of the argument and strive to be objective, unbiased, and honest.
Carb cycling: Overview, benefits, example menu, and tips
Last updated on December 27, 2023, and last reviewed by an expert on August 18, 2023.

Carb cycling is a strategy that modifies carbohydrate consumption over specific periods. It’s believed to aid in fat loss and sustain athletic prowess, especially when pursuing weight reduction objectives.

Carb cycling: Overview, benefits, example menu, and tips

The debate over carbohydrates has been burning strong for years.

Numerous popular diets limit carb amounts, with some even eliminating them altogether.

However, it’s essential to understand that no single macronutrient, including carbs, is inherently harmful. It’s all about personalizing your carbohydrate consumption to your needs.

To fine-tune their daily carbohydrate doses, many individuals have adopted a method of alternating their carb levels.

This practice is termed carb cycling.

Dive in and uncover the science and nuances behind carb cycling.

In this article

What is carb cycling?

Carb cycling is a dietary approach in which you alternate carb intake daily, weekly, or monthly.

People may use it to lose fat, maintain physical performance while dieting, or overcome a weight loss plateau.

Some people adjust their carb intake from day to day, while others may do longer periods of low, moderate, and high carb intake.

In short, carb cycling aims to time carbohydrate intake to when it provides maximum benefit and exclude carbs when not needed.

You can program your carb intake based on a variety of factors, such as:

A typical weekly carb cycling diet may include 2 high-carb days, 2 moderate-carb days, and 3 low-carb days.

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Protein intake is usually similar from day to day, whereas fat intake varies based on carb intake.

A high-carb day usually means low fat, whereas low-carb days are high fat.

Carb cycling is an advanced diet strategy requiring more manipulation and programming than a typical diet. To get it right, it’s helpful to consult a registered dietitian.

Summary: Carb cycling is a dietary approach in which you manipulate your carb intake depending on various factors.

The science behind carb cycling

Carb cycling is a relatively new dietary approach.

The science is primarily based on the biological mechanisms behind carbohydrate manipulation.

Few controlled studies have directly investigated carb cycling diets.

Carb cycling attempts to match your body’s need for calories or glucose. For example, it provides carbohydrates during your workout or intense training days.

The high-carb days also help your body replenish its supply of muscle glycogen, which may improve performance and reduce muscle breakdown.

Strategic high-carb periods may also improve the function of the weight- and appetite-regulating hormones leptin and ghrelin.

The low-carb days reportedly switch your body to a predominantly fat-based energy system, which may improve metabolic flexibility and your body’s ability to burn fat as fuel in the long term.

Another significant component of carb cycling is the manipulation of insulin.

The low-carb days and targeting of carbs around workouts may improve insulin sensitivity, a vital marker of health.

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In theory, this approach may support the benefits that carbohydrates provide.

Although the mechanisms behind carb cycling support its use, it’s still advisable to be cautious about this approach because of the lack of direct research. Many more clinical studies with human participants are needed to determine whether carb cycling is safe and effective.

Summary: The proposed mechanism of carb cycling is to maximize the benefits of carbohydrates and teach your body to burn fat as fuel. While this makes sense in theory, more direct research is needed.

Can carb cycling help you lose weight?

The mechanisms behind carb cycling suggest that it can benefit weight loss.

In theory, carb cycling may help you maintain physical performance while encouraging your body to burn fat for energy.

As with any diet, the primary mechanism behind weight loss is a calorie deficit, meaning you eat less than your body burns over a prolonged period.

You will likely lose weight if you implement a carb cycling diet alongside a calorie deficit.

However, the complex nature of carb cycling may confuse and make it difficult for beginners to stick to the plan.

In contrast, many people may enjoy the flexibility of carb cycling. This could probably improve adherence and long-term success for some people.

Summary: Carb cycling may help you lose weight if you maintain a calorie deficit.

Carb cycling for muscle growth and sports performance

Many people believe carb cycling can benefit muscle gain and physical performance.

Regular high-carb periods and targeted carb intake may help improve performance.

Consuming carbs during workouts may also aid in recovery, nutrient delivery, and replenishment of glycogen.

This may promote muscle growth. However, some research suggests carbs are not necessary to build muscle if protein intake is sufficient.

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While these mechanisms make sense in theory, direct research comparing carb cycling to other diets is needed to provide an evidence-based answer.

In addition, not all research supports the idea that “carb loading” improves athletic performance or muscle growth.

Overall, there isn’t enough data to know for sure.

Summary: The mechanisms behind carb cycling suggest it can help you optimize performance. However, further research is required.

Does carb cycling have any other benefits?

As mentioned earlier, carb cycling has the potential to provide some benefits.

By having periods of both low and high-carb consumption, you may get many of the benefits of both diets, as well as the potential negatives.

Benefits of low-carb periods may include improved insulin sensitivity, increased fat burning, improved cholesterol levels, and enhanced metabolic health.

High-carb refeeds may positively affect hormones during a diet, including thyroid hormones, testosterone, and leptin. High-carb periods could also reduce inflammation and help your body use iron.

These factors may play an essential role in long-term dieting success since hormones play a crucial role in hunger, metabolism, and exercise performance.

There may also be downsides to carb cycling. For starters, a complex diet can be hard to maintain. It’s also unclear whether any potential benefits will be long-lasting. Plus, there isn’t enough evidence to know whether carb cycling is safe for your health over time.

Summary: Low carb periods may provide several health benefits, and high carb refeeds can have positive effects on your hormones. The long-term effects of carb cycling are not known.

How to do carb cycling

Carb cycling has many variations, including daily alterations or more extended periods of high and low-carb intake.

Here is a sample week in which you regulate your carb intake daily:








Even more so than a typical diet, carb cycling can take a lot of fine-tuning and adjustment along the way.

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You can experiment with the number of high-carb days per week and the number of grams of carbs per day to find the best approach for your lifestyle, exercise routine, and goals.

If you prefer a low-carb diet, you can occasionally add carb cycling as a refeed.

You can either refeed every couple of weeks or do long periods, such as a 4-week low-carb phase with a 1-week refeed.

You will also notice that the number of carbs per day can vary drastically — this depends on activity level, muscle mass, and carbohydrate tolerance.

An athlete who trains 3 hours a day or a 250-pound bodybuilder may need the upper limit (or even more), whereas an individual with a more moderate fitness level may need to refeed on only 150–200 grams.

These examples are only suggestions. There is no proven formula or ratio for carb cycling. The best option is to consult a registered dietitian to make a plan that’s tailored for you. Some dietitians specialize in making diet plans for athletes.

If you take any medications or have any health conditions, it’s essential to talk with your doctor before making significant changes to your diet. Carb cycling may not be appropriate for people with diabetes.

Summary: There are several options for carb cycling, ranging from daily changes to monthly refeeds. Consult a registered dietitian to determine what works best for you and your goals.

Example carb cycling menu

Here are three sample meal plans for low, moderate, and high-carb days. Remember that the total carbs per meal in these samples are estimates, not exact numbers. Consider working with a dietitian to develop a more precise plan that meets your particular needs.

High carb day

Moderate carb day

Low carb day

Some carbs should be enjoyed in moderation, including simple sugars and refined carbs found in foods such as cakes, desserts, highly processed snack foods, and baked goods.

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In contrast, plenty of healthy carb sources are tasty and packed full of beneficial fiber, vitamins, and minerals.

When planning your high-carb days, focus on these healthier carb choices.

Instead of labeling carbs as “good” or “bad,” consider choosing unrefined carbs whenever possible. These include:

Summary: Limit refined carbs and added sugars. Instead, eat primarily whole foods that contain plenty of fiber.


Carb cycling can be an effective strategy for those keen on enhancing their diet, athletic prowess, and overall well-being.

Studies have shed light on the potential benefits of carb cycling, although results can be varied. Notably, no extensive research has been conducted into the effects of a prolonged carb cycling regimen in humans.

Instead of consistently sticking to a high or low-carb intake, a balanced approach might offer physical and mental advantages.

When aiming for fat reduction through carb cycling, consuming enough protein and ensuring a caloric deficit is vital.

For personalized guidance on carb cycling and determining the right carb intake, consulting a nutrition expert can be helpful. Moreover, if you’re on medication or manage health conditions like diabetes, a discussion with your physician before adjusting your diet is crucial.

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