How to Gain Muscle Fast for Skinny Guys (Supplements, Diet & Tips That Work)
Struggling to gain weight no matter how much you eat? If you’re a skinny guy with a fast metabolism, building muscle can feel impossible — but it’s not. With the right supplements, training plan, and high-calorie diet, you can bulk up faster than you think.
This complete guide covers:
✅ The best weight gainer supplements for skinny guys
✅ A proven high-calorie muscle-gain diet
✅ Simple but effective training tips to see results fast
Let’s break it all down.
Why It’s Hard for Skinny Guys to Gain Muscle
If you’re naturally skinny (aka a “hardgainer”), your metabolism is likely burning through calories too quickly for your body to enter a surplus — and without a calorie surplus, you can’t build mass.
Here’s what skinny guys need to focus on:
Eat more than you think you need
Use high-calorie supplements to make it easier
Train consistently with progressive overload
Best Supplements to Gain Muscle Fast for Skinny Guys
Supplements make gaining muscle easier by helping you hit your calorie and protein targets without force-feeding yourself.
💥 1. Mass Gainer Shakes
Top Picks:
Mutant Mass Extreme 2500 – our #1 choice for fast muscle gain
USN Hyperbolic Mass – high-calorie and includes creatine
Critical Mass Original – best budget-friendly option
Mass gainers offer up to 1000–1500 calories per shake, with a balanced mix of carbs, protein, and fats. Perfect for post-workout or between meals.
💪 2. Creatine
Helps boost strength and training intensity so you can lift more and grow faster.
Top Pick: Applied Nutrition Creatine Monohydrate
🍓 3. Aminos & BCAAs
Great for recovery and preventing muscle breakdown — especially helpful if you do cardio or struggle to eat enough protein daily.
🧃 4. Whey Protein
If you prefer a leaner shake or want to increase daily protein without extra calories, whey is ideal. Stack it with creatine for extra strength gains.
Skinny Guy Diet Plan 1: Proven Muscle-Gain Diet
(This is based on a real-life plan used by someone with a fast metabolism — and it works.)
Meal 1: Breakfast (6:30 AM)
Amino drink on waking
Cheerios + 4 Weetabix Protein
2 Greek yogurts
Meal 2: Morning Snack (9:30 AM)
2 Greek yogurts + granola
Ham & cheese sandwich on 2 whole wheat crumpets
Protein shake
Optional: chocolate bar or doughnut
Meal 3: Lunch (12:30 PM)
Baked potato + tuna + butter
Mass gainer shake
Optional: chocolate bar
Meal 4: Pre-Workout (4:30 PM)
3 scrambled eggs
4 Weetabix Protein or porridge
Protein bar
Creatine + amino drink
Post-Workout (6:00 PM)
Mass gainer shake
1 banana
Meal 5: Dinner (7:30 PM)
Quarter-pound burger + chips
1 chicken breast
Meal 6: Before Bed (9:30 PM)
2 scrambled eggs
1 bowl of porridge
👉 This diet delivers over 3500–4000 calories/day, making it ideal for hardgainers looking to gain 1–2lbs per week.
Quick Tips to Gain Weight and Muscle Faster
✅ Track your food intake – Most skinny guys think they eat enough… until they actually count the calories.
✅ Lift heavy with progressive overload – Stick to compound lifts and push yourself every week.
✅ Never skip meals – Your body needs fuel to grow. Eat even when you’re not hungry.
✅ Use a mass gainer twice daily – Especially post-workout and before bed.
✅ Stay consistent – This takes weeks, not days. Show up, eat big, and stay on plan.
Summary: Your Muscle-Building Starter Kit
If you’re a skinny guy trying to gain muscle fast:
✅ Use high-calorie mass gainer shakes
✅ Add creatine and amino acids for better performance and recovery
✅ Follow a high-calorie diet like the one above
✅ Stay consistent with training and eating
It works — because this exact strategy has worked for us.
Want more help?
We’ve built muscle-building plans just for skinny guys, plus guides on the best weight gainers, home workouts, and real-life transformation stories.
Let us know what you need — we’re here to help you grow. 💪
