Weight Gain Supplements for Skinny men: The Real Guide for Hardgainers
Struggling to put on size no matter how much you eat or train? You’re not alone—and you’re not doing anything wrong. For naturally skinny guys (aka “hardgainers”), gaining weight and building muscle can feel like an uphill battle. Fast metabolisms, small appetites, and years of trial-and-error only make it tougher.
That’s where smart supplementation comes in.
At Muscle Products Store, we specialize in helping hardgainers break through frustrating plateaus. We’ve spent years testing and fine-tuning the most effective weight gain supplements for skinny guys—so you don’t have to guess. From personal experience and coaching hundreds of clients, we know what works (and what’s a waste of money).
Whether you’re just starting your bulking journey or you’ve been stuck at the same weight for months, this guide will walk you through the best weight gain supplements to help you build size, strength, and confidence—fast.
In this expert-backed guide, you’ll discover:
The top supplements for skinny guys trying to gain muscle
When and how to use them for the best results
Real-world tips from guys who’ve transformed their bodies the same way you will
Let’s skip the hype and focus on what actually works—because if you’re serious about gaining mass, you need a system that supports your metabolism, muscle recovery, and calorie intake.
table of contents
What Are the Best Types of Supplements for Skinny Guys to Build Muscle & Gain Weight?
Starting your muscle-building journey can feel overwhelming—especially if you’re naturally skinny and unsure where to begin. But here’s the truth: while training and diet are your foundation, the right supplements can fast-track your results when used correctly.
Whether your goal is to add mass, improve strength, or boost recovery, understanding the key supplement categories is the first step toward building a strong, muscular physique.
Core Supplements Every Skinny Guy Should Consider:
1. Mass Gainers
High-calorie formulas designed to help you stay in a calorie surplus. Ideal for hardgainers who struggle to eat enough through whole foods alone.
2. Whey Protein
Fast-digesting and rich in essential amino acids, whey protein is critical for muscle recovery and growth—especially after workouts.
3. Creatine
One of the most researched supplements for increasing strength, power, and muscle volume. A must-have for anyone serious about training.
4. BCAAs / EAAs (Branched Chain & Essential Amino Acids)
Support workout endurance, reduce muscle breakdown, and accelerate recovery—great for fast metabolisms or training on an empty stomach.
5. Pre-Workout Powders
Boost energy, focus, and stamina so you can push harder during your training sessions.
6. Protein Bars & Shakes
Perfect for keeping your calorie and protein intake high while on the go—especially helpful if you’re too busy to meal prep.
Your Supplement Solution: Muscle Products Store
At Muscle Products Store, we offer a carefully curated selection of high-performance supplements made specifically for men who struggle to gain size. We’ve spent years testing, reviewing, and recommending the most effective products on the UK market—so you don’t waste time (or money) on what doesn’t work.
Our collection includes:
Premium Mass & Weight Gainers
Trusted Whey & Casein Proteins
Pure Creatine Monohydrate
Effective BCAAs & EAAs
Energy-boosting Pre-Workouts
Convenient Protein Bars & Meal Replacements
We back our selections with both real-world experience and excellent customer feedback—ensuring you get nothing but the best for your budget and goals.
🎥 Need Extra Guidance? Check Out Our YouTube Channel
Not sure how to use these supplements in your routine? Our YouTube channel is packed with helpful videos tailored to skinny beginners. You’ll find:
Step-by-step supplement guides
Mass gainer vs whey protein breakdowns
BCAA vs EAA comparisons
Beginner workouts to kickstart muscle growth
With the right knowledge, trusted guidance, and smart supplementation—you’ll be fully equipped to beat your high metabolism and start building the physique you’ve always wanted.
Ready to explore the best supplement brands for your goals? Let’s dive in. 👇
Top Choice Weight Gain Supplements for Skinny Guys
If you’re looking to gain weight, build muscle, and increase strength, these supplements are proven to help. Whether you’re struggling with a fast metabolism or simply need extra calories and nutrients, these are the best bulking supplements for you.
1. Top Mass Gainers for Skinny Guys
Mass gainers provide high-calorie shakes packed with protein, carbs, and essential nutrients to help you bulk up fast.
✅ Best for Skinny Guys Who Struggle to Eat Enough Calories
- Mutant Mass Extreme 2500 – High-calorie mass gainer for rapid size gains
- Optimum Nutrition Serious Mass – A trusted, balanced weight gainer
- USN Hyperbolic Mass – Designed for extreme bulking and strength
- USN Muscle Fuel Anabolic – Great for lean muscle gains
- Applied Nutrition Critical Mass – Clean, nutrient-dense calorie source
2. Top Creatine Supplements for Strength & Size
Creatine helps improve muscle strength, recovery, and overall size, making it essential for hardgainers.
✅ Best for Skinny Guys Looking to Gain Strength & Muscle Volume
- Mutant Creakong CX8 – A blend of 3 powerful creatine types
- USN Creatine Anabolic 5000 – Pure and highly absorb-able lots of added benefits for hard gainers
- Optimum Nutrition Platinum Creatine – A reliable, high-quality choice
3. BCAAs & Amino Acids for Muscle Recovery
Branched-chain amino acids (BCAAs) prevent muscle breakdown and promote muscle growth, ensuring you don’t lose hard-earned gains.
✅ Best for Preventing Muscle Breakdown & Enhancing Recovery
- Mutant Geaar – High-quality EAA + BCAA blend
- Mutant BCAAs 9.7 – Supports muscle recovery and endurance
- CNP Aminos – Great for muscle hydration and repair
- Per4m Amino Extra – A top-rated amino acid formula
4. Testosterone Boosters for Strength & Growth
Testosterone plays a crucial role in muscle growth and strength gains, making these boosters a great addition for naturally skinny guys.
✅ Best for Natural Strength & Muscle Gains
- Mutant Test – A powerful testosterone booster
- Animal Test – Trusted by serious lifters
- USN Turk 1200 – Natural turkesterone-based formula
- Applied Nutrition Turk X – Supports muscle growth and endurance. (Top Choice)
5. Protein Bars for Easy Nutrition
If you struggle to hit your daily protein intake, protein bars are a convenient and tasty solution.
✅ Best for On-the-Go Protein Boost
- Huel Bars – Clean, plant-based protein
- Grenade Bars – Delicious and protein-packed
- Snickers High Protein Bar – Classic flavor with a protein twist
6. Best Pre-Workouts for Energy & Performance
Pre-workouts enhance energy, strength, and focus—helping you train harder and build muscle faster.
✅ Best for Boosting Workout Performance
- ABE Pump – Great for insane pumps
- ABE Pre-Workout – Popular and effective
- Optimum Nutrition Platinum Pump – Supports energy & muscle pumps
Best Bulking Supplements for Skinny Guys
Top Pick: Mutant Mass Extreme 2500
If you’re searching for the best weight gain supplement for skinny guys, Mutant Mass Extreme 2500 is our top recommendation.
This high-powered mass gainer is specifically designed for hardgainers who need serious calorie support. Packed with quality protein, complex carbohydrates, and healthy fats, it delivers the fuel your body needs to build muscle and gain size fast. Pair it with Mutant Creakong CX8 during your workouts to maximize strength, size, and recovery.
How to Use These Supplements for Maximum Weight Gain
Buying the right supplements is only step one—timing and usage make all the difference. Here’s a detailed guide to using each product effectively for optimal results:
1. Mass Gainers – High-Calorie Fuel for Skinny Guys
Best Time to Take:
✅ Between meals to increase overall calorie intake
✅ Post-workout if you struggle to eat a full meal
How to Use:
Mix 1–2 scoops with milk or water
Boost calories by blending in oats, banana, or peanut butter
Take 1–2 servings daily, based on your weight gain goals
🔥 Pro Tip: Use mass gainers in addition to real food—not as a meal replacement.
2. Creatine – Strength & Muscle Growth Booster
Best Time to Take:
✅ Pre-workout for more energy
✅ Post-workout for recovery
✅ Or anytime daily—consistency is key
How to Use:
Take 5g (about 1 teaspoon) with water, juice, or your protein shake
No loading phase needed—just take it daily
🔥 Pro Tip: Stay hydrated. Drink extra water while using creatine to avoid bloating and maximize performance.
3. Whey Protein – Essential for Muscle Recovery
Best Time to Take:
✅ Immediately after workouts (for fast absorption)
✅ Between meals to support daily protein intake
✅ In the morning if you skip a high-protein breakfast
How to Use:
Mix 1 scoop (25–30g protein) with water or milk
Drink within 30 minutes post-workout
Blend with banana, oats, or nut butter for a higher-calorie shake
🔥 Pro Tip: Turn your whey protein into a weight gainer by adding calorie-dense ingredients.
4. BCAAs – Prevent Muscle Breakdown & Boost Recovery
Best Time to Take:
✅ During workouts to reduce muscle breakdown
✅ Pre- or post-workout to support endurance and recovery
✅ First thing in the morning on an empty stomach (especially if training fasted)
How to Use:
Mix 1 scoop with water
Sip before, during, or after your workout
🔥 Pro Tip: BCAAs are especially helpful if you’re training on an empty stomach—they protect lean muscle mass.
Final Thoughts
When taken correctly, these bulking supplements can dramatically improve your ability to gain weight, build lean muscle, and recover faster. But remember—consistency is everything.
Stick to your routine, train with purpose, and combine these products with a high-calorie, nutrient-rich diet to see serious transformation.
Best Weight Gain Supplements for Skinny Guys Without a Gym
Think you can’t gain weight without hitting the gym? Think again. While strength training does accelerate muscle growth, weight gain without gym access is absolutely possible—as long as you stay in a consistent calorie surplus and support your body with the right nutrition.
Whether you’re managing a busy lifestyle, traveling, or just not ready for a gym commitment, the right supplements can help you bulk up efficiently and conveniently.
Why Supplements Matter for Skinny Guys Not Working Out
If you’re naturally slim and not lifting weights, your body still needs extra calories, protein, and recovery nutrients to gain weight—especially if you have a fast metabolism. Supplements help fill in the gaps when regular meals aren’t enough, keeping your calorie intake high and consistent.
Remember: you don’t need a gym to build a better physique. You just need a surplus of the right nutrients and a plan that fits your lifestyle.
✅ Top Supplements for Gaining Weight Without a Gym
1. Whole Food Gainer Shakes
If you struggle to cook multiple high-calorie meals a day, meal replacement shakes are a lifesaver. Products like Per4m Meal Replacement or USN Whole Shake provide a balanced blend of proteins, healthy fats, and complex carbs—perfect for fueling steady weight gain on the go.
📌 When to take:
As a quick meal when you’re short on time
Between meals to increase calorie intake
In the evening if you’ve missed meals during the day
2. Protein Bars
Busy schedule? No time to prep? Protein bars are portable, delicious, and surprisingly effective at helping skinny guys meet daily calorie and protein goals.
📌 Pro tip: Look for bars with at least 15–20g of protein and 200–300+ calories to support real gains.
3. Casein Protein
Casein is a slow-digesting protein that feeds your muscles gradually over several hours—making it perfect for overnight recovery. Even without heavy lifting, casein helps prevent muscle breakdown and supports a steady metabolic environment for growth.
📌 When to take:
Before bed
During long periods without food (e.g., work shifts, travel days)
Can You Gain Muscle Without Lifting?
While building massive muscle requires resistance training, skinny guys can still improve overall weight, energy, appearance, and lean tissue by:
Staying consistent with calorie intake
Increasing protein consumption
Walking, stretching, or doing bodyweight exercises at home
Prioritizing sleep and recovery
Supplements help optimize all of these efforts, even if your activity level is low.
Final Thoughts
You don’t need equipment or a gym membership to start gaining weight. With the right high-calorie shakes, protein snacks, and recovery supplements, you can gradually add size, improve your energy, and support lean muscle—all from home.
At Muscle Products Store, we offer convenient, beginner-friendly supplements that fit your routine—whether you’re lifting or not. Stay tuned for our next section where we reveal the top brands and product picks trusted by hardgainers across the UK.
Ready to gain weight without the gym? Let’s get started. 💪
Unsure Which Supplements Are Right for You? Let Us Tailor Your Perfect Plan!
Take the first step toward your transformation today! Fill out our quick questionnaire, and we’ll personalize a supplement plan designed specifically for your goals and lifestyle.
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Don’t leave your success to chance—let us help you succeed!
Frequently asked questions
The best supplements for skinny guys trying to gain muscle are mass gainers like Mutant Mass or Serious Mass, whey protein powders like Optimum Nutrition Gold Standard Whey, and creatine monohydrate. These provide the extra calories, protein, and muscle-building support skinny guys need to gain weight and build muscle effectively.
This depends on your metabolism, how much you are eating, and if you are trying to gain muscle or weight quickly. If you have a fast metabolism, you will need a mass/weight gainer for sure. If you eat enough for your body weight to gain but have a slightly slower metabolism, whey protein may be a better option. However, if you are trying to gain muscle fast, I would still recommend a mass gainer but with lower serving sizes. Mass gainers have a full nutrient profile that helps with muscle building and aid in better recovery after workouts.
For maximum muscle growth, a protein supplement like whey protein should be consumed shortly after workouts to support recovery and muscle growth/repair. Whey protein can also be taken in the morning or between meals to help meet daily protein needs. Casein protein at night is also effective. Consuming enough protein from a supplement and whole foods is key for muscle gain.
For the best muscle growth we would recommend a mass/weight gainer they are full of everything your muscles need to recover to create good muscle growth. A amino acid and creatine supplement wile training are also great with whey protein shakes during the day or mass gainer depending on your goals. We would also say a test booster is virtually essential supplement for muscle growth.
Choosing between whey protein and a mass gainer depends on your goals and body type. If you have a fast metabolism and find it challenging to gain weight, a mass gainer is ideal. Mass gainers provide a higher calorie intake and a complete nutrient profile, which helps in building muscle and recovering after workouts.
On the other hand, if your metabolism is slightly slower and you’re already consuming enough calories to gain weight, whey protein might be a better option. Whey protein supports muscle growth without adding too many extra calories, making it suitable for those who want to build lean muscle. Ultimately, if your goal is rapid muscle gain, a mass gainer with reduced serving sizes can be beneficial due to its comprehensive nutritional content. However, for those aiming for lean muscle growth, whey protein is often the preferred choice.
For skinny guys looking to gain muscle, some of the top mass gainers include Mutant Mass Extreme 2500, Mutant Mass, USN Muscle Fuel Anabolic, USN Hyperbolic Mass, and Optimum Nutrition Serious Mass. Any of these options are great for individuals with fast metabolisms and specific muscle-gaining goals.
For those who struggle significantly with gaining weight, we recommend Mutant Mass Extreme 2500 or USN Hyperbolic Mass. These products are specifically designed for people with fast metabolisms and will effectively support muscle gain.
Overall, all of these mass gainers will help anyone looking to build muscle and achieve their goals.
For skinny guys looking to build lean muscle, some of the best whey protein options include USN Whey Protein, Per4m Whey Protein, Optimum Nutrition Whey Protein, CNP Whey, and Mutant Whey.
Each of these whey proteins offers high-quality protein to support muscle growth and recovery. USN Whey Protein, Optimum Nutrition Whey Protein, Per4m Whey Protein, CNP Whey, and Mutant Whey are all well-regarded for their effectiveness and taste. They each provide excellent nutritional benefits and a range of flavors to suit different preferences.
Overall, any of these whey proteins will help skinny guys enhance their muscle-building efforts and achieve their goals.
The must have supplements for skinny guys are a good quality mass gainer, a creatine supplement, a testosterone booster and a amino acid supplement. With our guides you will find exactly the best supplements for you.
The 100% best supplements are a good mass gainer like Mutant Mass Extreme a creatine supplement and a testosterone booster like Turkesterone. Use our guides to find the best choices available.
“As a skinny man I was struggling to gain weight, this website has really helped, easy to follow guides told me exactly what I needed and the muscle and weight has started coming on. Great website, thank you”
Danny, Exeter
“Me and my girlfriend started working out but struggled with finding supplements and we come across this website, and we could not be happier, amazing guides and we have both made great progress.”
Adam & Caitlin, Newcastle
