The anabolic diet is a cycling approach to eating that alternates between very low-carb days during the week and high-carb days on the weekend. Created by Dr. Mauro Di Pasquale, a physician and competitive powerlifter, the diet aims to help people build muscle and lose fat by manipulating which fuel source the body relies on. The core idea: spend five days training your body to burn fat, then spend two days loading up on carbohydrates to refuel muscles and support recovery.
How the Weekly Cycle Works
The anabolic diet splits each week into two distinct phases with very different eating patterns.
During the weekday phase (Monday through Friday), carbohydrate intake drops to no more than 30 grams per day. That’s roughly the amount in a single banana. The rest of your calories come from fat and protein, with the target breakdown being 60 to 65 percent fat, 30 to 35 percent protein, and just 5 to 10 percent carbohydrates. This ratio is low enough to push your body into a state similar to ketosis, where it starts relying on fat for fuel instead of glucose.
On the weekend (Saturday and Sunday), the macros flip almost entirely. Carbohydrates jump to 60 to 80 percent of total calories, while fat drops to 10 to 20 percent and protein stays at 10 to 20 percent. This carb-loading window is designed to replenish the glycogen stored in your muscles, which fuels high-intensity training. Research on carbohydrate loading shows that trained athletes can fully restore their muscle glycogen stores within just 24 hours of high-carb eating, which supports the idea that a two-day window is more than enough to top off your reserves.
The Three Calorie Phases
Beyond the weekly low-carb/high-carb cycle, the anabolic diet uses three broader phases that change how much you eat overall. You choose your phase based on your current goal.
Maintenance: Your starting point. You eat enough calories to keep your weight stable, adjusting as needed to stay within about one pound of your starting weight each week. This phase also serves as a transition between bulking and cutting.
Bulk (mass building): When you want to add muscle, you increase calories by roughly 10 to 20 percent above your maintenance level. A common starting point is around 16 calories per pound of body weight. The target rate of gain is 0.25 to 0.5 percent of your body weight per week, slow enough to favor muscle over fat.
Cut (fat loss): To lose body fat while preserving muscle, you reduce calories by 10 to 20 percent below maintenance. The goal is to lose about 0.5 to 1 percent of your body weight per week. Losing faster than that increases the risk of losing muscle along with fat.
What to Eat During the Week
Because weekdays require so much fat and so little carbohydrate, the food choices look very different from a standard diet. Meals center on fatty cuts of beef, pork, and chicken with the skin on, whole eggs, cheese, butter, avocado, nuts and seeds, nut butters, olives, and full-fat dairy like Greek yogurt and cream cheese. Cooking with oils, adding mayonnaise, and using heavy cream in coffee are all common strategies to hit the high fat target.
Most vegetables are allowed in small amounts since leafy greens and cruciferous vegetables are low in carbs. Starchy foods like bread, pasta, rice, potatoes, and most fruit are essentially off the table until the weekend. The 30-gram carb ceiling means you need to track carefully, because even small amounts of carbs from sauces, dairy, and vegetables add up.
On the weekend, the shift is dramatic. Pasta, rice, bread, oatmeal, pancakes, fruit, and potatoes all come back. The point is to eat enough carbohydrates to fully reload muscle glycogen, which supports the next week of hard training.
The First Few Weeks Are the Hardest
Switching to very low carbohydrate intake triggers a cluster of symptoms that people on ketogenic-style diets commonly call “keto flu.” In a study of 300 people following ketogenic diets, about one-third reported experiencing these transition symptoms. The most frequently reported issues were headache, fatigue, nausea, dizziness, brain fog, gastrointestinal discomfort, and a noticeable drop in energy.
These side effects tend to peak within the first seven days and gradually fade over the first month. Most people who tracked when their symptoms resolved reported feeling better somewhere between day 3 and day 30, with a median of about 4.5 days. On the anabolic diet specifically, the weekend carb load can provide some relief that a strict ketogenic diet doesn’t offer, since you’re only five days away from your next high-carb window. Still, the first two to three weeks often feel rough as your body adapts to burning fat as its primary fuel.
How It Differs From a Cyclical Ketogenic Diet
The anabolic diet looks similar to a cyclical ketogenic diet on the surface. Both use low-carb weekdays and high-carb weekends. The key difference is protein. A standard cyclical ketogenic diet typically keeps protein at around 0.8 to 1.6 grams per kilogram of body weight per day, which is moderate. The anabolic diet pushes protein higher, to 30 to 35 percent of total calories, specifically to support muscle growth.
This distinction matters. A study comparing a cyclical ketogenic diet to a balanced reduction diet in young men doing resistance and aerobic training found that both approaches reduced body weight and body fat to a similar degree. But only the balanced diet group improved muscle strength and endurance performance. The cyclical ketogenic group actually lost lean body mass and body water, while the balanced diet group preserved both. This suggests that the very low-carb phase can work against strength and muscle goals if protein and overall nutrition aren’t carefully managed.
The Testosterone Question
One of the central claims behind the anabolic diet is that eating high fat boosts testosterone, the hormone most directly linked to muscle growth. The relationship is more nuanced than the marketing suggests.
A meta-analysis looking at how protein and carbohydrate intake affect testosterone found that moderate and high-protein diets (up to about 3.4 grams per kilogram of body weight per day) had no consistent effect on testosterone levels. Only extremely high protein intakes, above 3.4 grams per kilogram per day, consistently lowered total testosterone by an average of about 5.23 nmol/L. Those very high protein diets also tended to raise cortisol, a stress hormone that works against testosterone.
For most people following the anabolic diet, protein intake will fall well below that 3.4 g/kg threshold, so the diet is unlikely to suppress testosterone. But the evidence that it actively raises testosterone beyond normal levels is thin. The more honest framing is that the anabolic diet avoids the testosterone-lowering effects of extremely high protein or extremely low fat intakes, rather than producing a hormonal boost comparable to anabolic steroids (which, despite the name, it does not replicate).
Who the Anabolic Diet Suits Best
The anabolic diet was designed for bodybuilders and strength athletes who want to stay relatively lean while building muscle. It works best for people who can handle rigid structure during the week and who train hard enough to benefit from weekend carb loading. If your workouts are mostly low-intensity or you train fewer than three to four days per week, the aggressive carb cycling is probably more complexity than you need.
People who struggle with the all-or-nothing nature of strict ketogenic diets sometimes find the anabolic diet more sustainable, because the weekend provides a psychological and physiological break. On the other hand, some people find the constant switching between metabolic states uncomfortable, and the weekend carb load can lead to bloating, water retention, and digestive issues as the body rapidly shifts gears. Tracking macros closely is essentially required, since the difference between staying under 30 grams of carbs and accidentally eating 60 grams can be the difference between maintaining ketosis and not.