Bulking and cutting: eat more to build muscle, eat less to see it. Just not that much more.
The bodybuilding cycle has real science behind it. It also has a lot of people eating a family pizza in the name of gains. The evidence says the surplus should be small, the cut slow, and the protein steady.
The short version
- What it is
- Alternating phases: a calorie surplus to build muscle (bulk), then a calorie deficit to lose the fat that came with it (cut).
- Good for
- People who lift seriously and want visible muscle. Physique sports.
- Bad at
- Everyday health. Most non-athletes just need to eat well and lift.
- Evidence
- Moderate. Good on protein and rates of change, thin on long-term cycles.
- Our take
- Fine for athletes who do it slowly. Not something our plan does.
What bulking and cutting actually is
Building muscle needs a training stimulus, protein, and enough energy. Losing fat needs an energy deficit. Doing both at once is possible, especially for beginners, but slow. So bodybuilders split it up: months of eating a bit more than they burn while training hard (the bulk), then weeks or months of eating less to strip off the fat (the cut).
The "clean bulk" or "lean bulk" means a small surplus from mostly whole food. The "dirty bulk" means eating anything and everything: pizza, shakes, a second dinner. Guess which one Instagram prefers.
How it works in your body
Muscle grows slowly. Even in a good year, a trained person adds far less muscle than a big surplus would let them add in fat. Any energy above what your muscles can use goes into storage. That's why the surplus should be small.
A review for natural bodybuilders recommends an off-season surplus of about 10–20% above maintenance, aiming for weight gain of roughly 0.25–0.5% of body weight a week for beginners and intermediates, and less for advanced lifters.1 For a 75 kg person, that's about 0.2–0.4 kg a week. Not 1 kg.
When you cut, your body fights back. Energy expenditure drops, hunger hormones rise and the body becomes more efficient, which slows fat loss and pushes towards regain.6 Cutting slowly and keeping protein high limits the muscle you lose on the way.
What you eat, what you don't
Eat
- Protein at every meal: chicken, fish, eggs, Greek yoghurt, tofu, beans
- Rice, potatoes, oats, wholegrain bread to fuel training
- Vegetables and fruit, both phases
- Olive oil, nuts, avocado (easy calories in a bulk)
- Milk or soy milk
Forget it
- "Dirty bulk" fast food and sweets
- Mass-gainer shakes made of sugar
- Crash cuts before a holiday
- Dehydration and diuretics before a show
- Skipping vegetables because "they're not macros"
A day on a lean bulk (and what changes on a cut)
A lean bulk looks less like a feeding frenzy and more like normal eating with an extra snack. Four meals, protein in each one:
- Breakfast: oats cooked in milk or soy milk, a banana, a handful of nuts.
- Lunch: chicken, fish or tofu with rice and a big portion of vegetables.
- After training: Greek yoghurt or skyr with fruit, or a glass of milk and a sandwich.
- Dinner: salmon, lean beef or lentils with potatoes, vegetables and a drizzle of olive oil.
On a cut, the plate keeps its shape. Protein stays where it was, vegetables go up, and the rice, potatoes, oil and nuts shrink. If the scale moves faster than the rates above, you're eating too little.
In Singapore: hawker food makes protein easy and portions hard. Steamed chicken rice, fish soup, yong tau foo, economy rice with an extra serving of meat or tofu, and soy milk without sugar all fit a bulk. On a cut, ask for less rice and more vegetables. The traps are the gravy-drenched plates, fried chicken cutlets and teh tarik three times a day.
In Austria, Germany and Switzerland: quark and skyr are cheap protein, and so are cottage cheese, eggs, trout and turkey. Wholegrain bread and potatoes cover the carbs. The traps: the Döner as a nightly bulk meal, Leberkäse rolls, and "protein" puddings and bars that are mostly sugar with a gym-friendly label.
Alcohol on a bulk or cut
OK, now and then
- One beer or glass of wine with a meal, not on training nights
- A spirit with soda water and lime
- Alcohol-free beer after a session
Kills the gains
- Heavy nights out after training
- "Liquid bulking" with beer
- Cocktails and sugary mixers on a cut
- Drinking instead of eating to "save calories"
50 Club: one alcohol-free beer after training, one real one at the weekend.
Alcohol adds calories with no protein, disturbs sleep (when muscle recovers) and makes the late-night kebab inevitable. All the details are in our alcohol guide.
What it's good for, with proof
Protein: the one number that matters
A meta-analysis of 49 trials found that adding protein to strength training increased muscle and strength gains, with no extra benefit above about 1.6 g per kg of body weight a day.5 Off-season guidance for bodybuilders sits at 1.6–2.2 g per kg, spread over 3–6 meals.1 More than that is mostly expensive urine.
Slow cuts keep more muscle
In a trial with 24 elite athletes, those who lost weight slowly (about 0.7% of body weight a week) gained lean mass and strength, while those losing twice as fast didn't gain lean mass.4 For contest prep, the recommendation is to lose about 0.5–1% of body weight a week.2
Planned eating beats random eating
In young elite athletes doing a weight-gain phase, those following a meal plan with a surplus of about 500 kcal a day gained more lean mass, and kept it a year later, while those eating freely gained none.8 Small study, 21 athletes, but structure clearly helped.
The uncomfortable truth
"The more you eat, the more muscle you build." In a trial with 39 elite athletes, the group on a bigger planned surplus gained more weight, but the extra was fat: fat mass went up 15% against 3%, and lean mass gains were no different between groups.3 Past a modest surplus, you're just bulking your belly.
"You have to bulk and cut." Only if you compete or want very low body fat. For most people who lift, eating at maintenance with enough protein builds muscle and loses fat slowly at the same time, with fewer swings.
The risks
- Fat gain that sticks. Big bulks leave a lot to cut, and not everyone manages the cut.
- Disordered eating. Cycles of overeating and restricting, plus body checking, are a known risk in physique sports.
- Peak-week tricks. Dehydration and water manipulation before a show can be dangerous and may not even improve how you look.2
- Low energy on long cuts. Eating too little for too long hurts hormones, bones and performance. Sports bodies warn about this.7
- Supplements. Anything promising fast muscle may be contaminated or illegal. Check before you buy.
Allergies: watch the staples
| Staple | Allergen (EU list of 14)9 | Swap |
|---|---|---|
| Whey and casein shakes, milk, Greek yoghurt | Milk | Pea or rice protein, soy yoghurt |
| Eggs, egg whites | Eggs | Tofu, chicken, fish |
| Tuna, salmon | Fish | Chicken, turkey, lean beef |
| Peanut butter, almonds | Peanuts, tree nuts | Seed butter, pumpkin seeds |
| Oats, pasta, bread | Cereals containing gluten | Rice, potatoes, quinoa |
| Soy protein, tofu | Soy | Pea protein, lentils |
Don't do bulking and cutting if you…
- have ever had an eating disorder
- are under 18 (eat enough and train, skip the cycles)
- are pregnant or breastfeeding
- have kidney disease (protein targets need your doctor)
- have diabetes and take insulin
Healthen me asks about all of these and gives you a different plan if any apply.
How we use bulking and cutting in your plan
We don't. Bulking and cutting is information only. Our plan is built for eating well for life, not for alternating seasons.
What we take from it: protein at every meal from our high-protein core, and slow, steady change rather than crash phases. If you train hard, tell Healthen me: your plan gets more food and more carbs around training, and you can read about carb cycling and diet breaks if you want to go further.
This article is general information, not medical advice. If you have a medical condition or take medication, talk to your doctor before changing how you eat.
Sources
- Iraki J et al. Nutrition recommendations for bodybuilders in the off-season: a narrative review. Sports 2019;7(7):154. doi.org/10.3390/sports7070154
- Helms ER, Aragon AA, Fitschen PJ. Evidence-based recommendations for natural bodybuilding contest preparation: nutrition and supplementation. Journal of the International Society of Sports Nutrition 2014;11:20. doi.org/10.1186/1550-2783-11-20
- Garthe I et al. Effect of nutritional intervention on body composition and performance in elite athletes. European Journal of Sport Science 2013;13(3):295–303. doi.org/10.1080/17461391.2011.643923
- Garthe I et al. Effect of two different weight-loss rates on body composition and strength and power-related performance in elite athletes. International Journal of Sport Nutrition and Exercise Metabolism 2011;21(2):97–104. doi.org/10.1123/ijsnem.21.2.97
- Morton RW et al. A systematic review, meta-analysis and meta-regression of the effect of protein supplementation on resistance training-induced gains in muscle mass and strength in healthy adults. British Journal of Sports Medicine 2018;52(6):376–384. doi.org/10.1136/bjsports-2017-097608
- Trexler ET, Smith-Ryan AE, Norton LE. Metabolic adaptation to weight loss: implications for the athlete. Journal of the International Society of Sports Nutrition 2014;11(1):7. doi.org/10.1186/1550-2783-11-7
- Thomas DT, Erdman KA, Burke LM. American College of Sports Medicine joint position statement: nutrition and athletic performance. Medicine & Science in Sports & Exercise 2016;48(3):543–568. doi.org/10.1249/MSS.0000000000000852
- Garthe I et al. Long-term effect of nutritional counselling on desired gain in body mass and lean body mass in elite athletes. Applied Physiology, Nutrition, and Metabolism 2011;36(4):547–554. doi.org/10.1139/h11-051
- Regulation (EU) No 1169/2011 on food information to consumers, Annex II (the 14 allergens). eur-lex.europa.eu/eli/reg/2011/1169/oj