When it comes to building muscle and gaining size, most people focus on one thing: protein. And while protein is absolutely essential, the truth is that muscle growth is a team effort — and the ratio of all your macronutrients matters just as much as any single ingredient.
That's the thinking behind Prokin Build. Rather than simply packing in as much protein as possible, we've designed Prokin Build around a purposeful macronutrient ratio — 30% protein, 20% fat, and 50% fast-absorbing carbohydrates — that works with your body's physiology to support real, steady gains in muscle and mass.
So what's the science behind these numbers? Let's break it down.
Why Macronutrient Ratios Matter
Your body doesn't build muscle from protein alone. It builds muscle when the right nutrients arrive at the right time, in the right proportions, to support training, recovery, and growth. Think of it like a construction project: protein provides the building materials, carbohydrates power the workers, and fats keep the whole operation running smoothly. Get the balance wrong, and the project stalls.
The 30:20:50 ratio in Prokin Build has been developed to address all three of these roles simultaneously — making it particularly effective for hard gainers, growing teenagers, and active adults who are serious about putting on size.
30% Protein — The Building Blocks of Muscle
Protein is the foundation of muscle growth. When you train, you create microscopic damage in your muscle fibres. Your body repairs and rebuilds those fibres stronger and larger than before — a process called muscle protein synthesis (MPS). For this to happen, your body needs a steady supply of amino acids, the building blocks found in dietary protein.
Research consistently shows that people engaged in regular resistance training benefit from consuming between 1.6 and 2.2 grams of protein per kilogram of body weight per day to support muscle growth. Prokin Build's 30% protein allocation is designed to meet this target within a mass-gaining calorie plan.
Not all protein is equal, though. Prokin Build uses high-quality whey protein, which is rich in essential amino acids, particularly leucine. Leucine is a key amino acid that acts as a metabolic "trigger" for MPS, with research suggesting that a threshold of around 2,000–3,000mg per serve is needed to maximally stimulate muscle growth. [2] With over 2,800mg of leucine per serve, within the total dose of 28 grams of protein per serve, Prokin Build delivers exactly what your body needs to maximise MPS.
Distributing protein intake evenly across the day — every three to four hours — has also been shown to keep MPS rates elevated consistently, which is why Prokin Build works best as part of a structured daily nutrition plan rather than a one-off shake.
50% Fast-Absorbing Carbohydrates — Fuel, Recovery, and the Anti-Catabolic Effect
If protein is the building block, carbohydrates are the construction workers. Making up 50% of the Prokin Build formula, carbohydrates serve two vital purposes: fuelling your strenuous workouts and driving post-training recovery.
During resistance training, your muscles rely on glycogen — stored glucose derived from carbohydrates — as their main energy source. When glycogen runs low, performance drops, fatigue sets in, and your body may even begin breaking down muscle tissue for fuel. That's the opposite of what you want.
For athletes and bodybuilders focused on gaining size, carbohydrate needs are significant. Research recommends that bodybuilders in the off-season consume at least 3–5 grams of carbohydrate per kilogram of body weight per day to support the energy demands of resistance training, with higher intakes (up to 7–10 g/kg/day) appropriate for those with very high training volumes. Prokin Build's 50% carbohydrate allocation is designed to help meet this demand, keeping glycogen stores full and training performance high.
The type of carbohydrate matters too. Prokin Build uses maltodextrin, a fast-absorbing carbohydrate that is rapidly digested and delivered to muscles after training. This rapid delivery does two important things:
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Replenishes glycogen quickly, restoring your energy stores so you recover faster and are ready for your next session.
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Triggers an insulin response that helps shuttle both glucose and amino acids into muscle cells — creating an anabolic environment that supports both glycogen synthesis and muscle repair simultaneously.
This "protein-sparing" effect is also worth noting: when carbohydrates are abundant, your body uses them for energy rather than converting amino acids into glucose. That means the protein you consume goes where it's supposed to — into building muscle, not fuelling your workout.
Each serve of Prokin Build delivers 47 grams of maltodextrin, working in direct synergy with the protein component to maximise recovery and growth.
20% Fat — The Hormonal Foundation
Fat often gets overlooked in mass-gain nutrition, but it plays a critical supporting role that you simply can't ignore. The key reason? Hormones.
Dietary fat is essential for the production of steroid hormones, including testosterone — one of the body's most powerful anabolic hormones. Testosterone directly promotes muscle protein synthesis and drives the adaptations that make resistance training effective. Research has shown that diets too low in fat can reduce circulating testosterone levels, which can blunt your body's ability to build muscle over time.
Leading sports nutrition bodies, including the International Olympic Committee and the American College of Sports Medicine, recommend that fat should comprise 20–35% of an athlete's total energy intake. Prokin Build sits at the lower end of this range — enough to support hormonal health and essential physiological functions, without displacing the protein and carbohydrates that are the primary drivers of muscle growth.
Prokin Build also includes MCT (Medium Chain Triglyceride) oil powder, a form of fat that is metabolised differently to most dietary fats. MCTs are rapidly absorbed and converted to energy by the liver, making them an efficient, calorie-dense fuel source that contributes to the overall energy surplus needed for mass gain — without being preferentially stored as body fat.
How It All Works Together
The real power of the 30:20:50 ratio isn't in any single macronutrient — it's in how they work together.
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Protein continuously supplies amino acids to keep muscle protein synthesis elevated.
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Carbohydrates fuel training, replenish glycogen, and create an insulin environment that enhances nutrient uptake and suppresses muscle breakdown.
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Fats support the hormonal environment that makes your body receptive to all of the above.
The result is a nutritional system that addresses the three core pillars of muscle growth: powering your training, supplying the building blocks, and optimising your body's anabolic environment.
Who Is Prokin Build Designed For?
Hard Gainers
If you struggle to put on weight despite eating well and training consistently, the challenge is usually caloric density. The 50% carbohydrate and 20% fat components of Prokin Build make it easier to achieve the caloric surplus your body needs, without having to eat enormous volumes of food. Liquid nutrition is particularly valuable here — a Prokin Build shake delivers a significant, easily digestible bolus of calories and macronutrients without the fullness that a large solid meal can cause.
Growing Teenagers
Adolescence is already a period of rapid growth, driven by naturally elevated levels of growth hormone and testosterone. For teens who are also training, nutritional support is doubly important — it needs to fuel both natural development and exercise-induced adaptation. The 30% protein allocation provides the amino acids needed for muscle, bone, and connective tissue development, while the energy from carbohydrates and fats supports the high caloric demands of a growing, active body.
Please note: Prokin Build is not suitable for children under 15 years of age except under medical or dietetic supervision.
Active Adults
For adults who have an established training routine and are ready to shift from maintenance into a dedicated muscle-building phase, Prokin Build provides a structured, evidence-based framework to do exactly that. The high protein intake supports MPS and body composition improvements, the carbohydrates maximise training performance and enable progressive overload, and the fat component supports hormonal health — which becomes increasingly important with age.
The Bottom Line
Building muscle isn't just about eating more protein. It's about giving your body the right balance of nutrients — in the right amounts — to train hard, recover well, and grow consistently.
The 30:20:50 macronutrient ratio in Prokin Build isn't arbitrary. It's the result of a purposeful, evidence-based design that reflects decades of sports nutrition research. Whether you're a teenager looking to fill out, a hard gainer trying to break through a plateau, or an active adult chasing serious size, these are the numbers that work.
Ready to build? Explore Prokin Build and start fuelling your gains the smart way.
References
1. Recent Perspectives Regarding the Role of Dietary Protein for the Promotion of Muscle Hypertrophy with Resistance Exercise Training – PubMed
2. International Society of Sports Nutrition Position Stand: protein and exercise – Journal of the International Society of Sports Nutrition. (https://jissn.biomedcentral.com/articles/10.1186/s12970-017-0177-8)
3. International Society of Sports Nutrition Position Stand: nutrient timing – PubMed
4. Nutrient timing revisited: is there a post-exercise anabolic window? – PubMed
5. Nutrition Recommendations for Bodybuilders in the Off-Season: A Narrative Review – PubMed
6. 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 – PubMed