Are You a Skinny Girl and Struggling to Gain Weight?

Gaining weight and building muscle can feel like an uphill battle for many women, especially if you have a naturally fast metabolism or struggle to consume enough calories. Whether your goal is to add healthy muscle or overcome weight challenges, understanding the right supplements can help you get there faster

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Understanding Your Body and Deciding the Supplements You Need

Before choosing supplements, it’s crucial to understand your metabolism and goals. Skinny girls with fast metabolisms may need higher-calorie intakes to gain weight, while those with slower metabolisms can focus more on lean muscle growth. The same nutrients are essential for muscle and weight gain, but the type of supplement you choose should depend on how quickly you want to see results and how your metabolism processes calories.

Fast Metabolism: Individuals with a fast metabolism burn calories quickly, requiring higher calorie intakes to gain weight. They may benefit from calorie-dense supplements like mass gainers to ensure they consume enough nutrients for muscle growth.

Slow Metabolism: Those with a slow metabolism process calories at a slower rate, making it easier to gain weight. They should focus on nutrient-dense supplements like whey protein and creatine to support gradual muscle development while managing calorie intake to avoid excess fat gain.

  • Fast Muscle Gain (Fast Metabolism): If you have a fast metabolism and struggle to gain weight, mass gainers like USN Hyperbolic and Mutant Mass Extreme, which combine protein, carbs, and BCAAs, are ideal. These supplements provide the extra calories you need to add both pounds and muscle quickly.
  • Controlled Weight Gain (Slower Metabolism): If you have a slower metabolism and prefer gradual muscle development without gaining excessive fat, creatine and whey protein powders. They provide the necessary nutrients for muscle growth without overwhelming your calorie intake.

Best Weight Gain Supplements for Skinny Girls: Whey Protein, Creatine, Amino Acids, Mass Gainers.

When it comes to gaining weight and building muscle, the essential supplements you need are simple:

  • Whey Protein: Protein is the building block of muscle tissue, and for skinny girls, it’s critical to getting those gains. Whey protein shakes make sure you hit your protein goals daily will help build and maintain muscle mass.
  • Creatine: Creatine is a naturally occurring compound that supports muscle energy. It’s particularly useful for skinny girls looking to lift heavier and add muscle mass quickly. Creatine monohydrate is the most researched and effective form.
  • Amino Acids: Drink them in the morning and before your workout to prevent muscle breakdown and support muscle maintenance. They aid in recovery and ensure your body has the building blocks it needs for muscle growth.
  • Mass Gainers: For those who struggle to consume enough calories through regular meals, mass gainers are a perfect solution. Packed with high nutrient content and dense calories, they provide the extra energy your body needs to gain weight and build muscle more efficiently. Ideal for those with fast metabolisms, mass gainers combine protein, carbs, and other essential nutrients to help you meet your daily calorie goals.

These four supplements form the foundation for effective weight gain and muscle building. They help you maximize every workout and make it easier to meet your protein and calorie goals.

Beyond the essentials, certain supplements can make your routine easier and more flexible:

  • Protein Bars: For those busy days when you can’t get in a shake or meal, protein bars are a convenient way to boost your protein intake.
  • Casein Protein: Perfect for nighttime use when your body needs slow-releasing protein for recovery, especially if you didn’t eat much throughout the day.
  • Multivitamins: Ensure your body has all the vitamins and minerals needed for muscle growth and overall health.

Top Choices: Best Weight Gain Supplements for Skinny Girls

Now you know your essentials, here are our recommended products to help you meet your specific needs:

Best Whey Protein for Skinny Girls
Your go-to supplement for muscle repair and growth:


We selected these whey proteins based on their high-quality protein content, excellent mixability, and overall effectiveness for muscle recovery. Each option provides great value for money and has been tested for taste and performance.

Best Creatine Supplements for Muscle Strength
Boost your muscle volume and strength with these top picks:


These creatines were chosen for their purity, effectiveness in enhancing performance, and positive user reviews. We’ve considered factors such as solubility and the presence of additional beneficial ingredients.

Top BCAAs and Amino Acids for Recovery
Help prevent muscle breakdown and support recovery:


Our selection of Amino Acids focuses on products with a balanced ratio of essential BCAAs and amino acids, good flavoring, and high-quality ingredients to optimize muscle recovery and minimize soreness and great for in the morning.

Best Mass Gainers for Skinny Girls (High-Calorie Options)
Ideal for rapid weight gain, recovery, and those who struggle with weight gain, these products are packed with high protein, carbohydrates, calories, and essential nutrients.


We chose these mass gainers based on their nutrient density, effectiveness in promoting weight gain, and quality of ingredients. Each product has been evaluated for its taste and mix-ability, ensuring a pleasant experience.

Best Protein Bars for Convenient Snacking
For quick snacks that keep you on track:


These protein bars were selected for their balance of protein, fiber, and taste, providing convenient options for snacking without sacrificing nutrition.

Multivitamins for Overall Health
It is crucial to ensure you have a well-rounded intake of vitamins.


We chose these multivitamins for their comprehensive nutrient profiles, ensuring they meet the specific needs of women looking to support their muscle-building goals.

Not sure which supplement is right for you? Take our personalized supplement quiz here!

How to Take Your Supplements (and When)

Maximize your muscle-building results by taking supplements at the right time:

  • Protein Powder: Consume in the day and post-workout to repair muscles and build lean mass.
  • Creatine: Take pre-workout for better strength and muscle volume.
  • Weight Gainers: Best taken midday and after a workout when your body needs a high-calorie intake.
  • Amino Acids & BCAAs: Drink first thing in the morning and before your workout to prevent muscle breakdown and aid in recovery.
  • Casein Protein: Ideal for nighttime recovery as it digests slowly.

Convenient Supplements for Weight Gain Goals

Trying to gain weight can be challenging, especially when it comes to consuming enough food as part of a weight gain diet.

The following supplements serve as convenient options that can be easily integrated into your daily life.

Whole Food Gainer Shakes
Whole food gainer shakes are beneficial in providing protein, clean carbs, fiber, and the advantages of greens. Products such as Mutant Flex Food and OXYGREENS can be mixed into your days, particularly when you’re busy or away from home. Use them sparingly, rather than daily, as a quick solution during times of need.

Protein Bars
Add more protein to your diet with convenient and flavorful protein bars. Ideal for on-the-go snacking, a protein bar can be stored in your pocket, car, or bag. However, don’t overindulge; limit your intake to one a day, and prioritize maintaining a good diet over relying solely on protein bars.

Casein Protein Powder
Casein protein shakes, known for being slow-digesting, are excellent for maintaining weight and aiding recovery after workouts, especially when you’re unable to eat for a while.

From Skinny to Strong: A Women’s Guide to Building Muscle

Looking for more guidance on building muscle effectively? Check out our comprehensive guide on How to Build Muscle for Women, where you’ll find full workouts, meal plans, and expert tips tailored specifically for women. Start your journey toward strength and muscle growth today!

Frequently asked questions On Muscle Building Supplements for Skinny Girls

Look for the following ingredients and their benefits:

  • Protein: Builds muscle and aids in recovery.
  • BCAAs: Prevent muscle breakdown and enhance recovery.
  • Creatine: Boosts muscle strength and endurance.
  • Carbohydrates: Essential for energy and weight gain.
  • Healthy Fats & Vitamins: Support overall nutrition and muscle growth.

Ideally, consume whey protein shortly after workouts for recovery and muscle growth. You can also take protein supplements in the morning, between meals, or casein protein at night for sustained muscle repair.

A mass gainer or weight gainer, combined with creatine and BCAAs, is highly effective for muscle growth. Whey protein shakes during the day also support muscle repair and growth.

If you have a fast metabolism and struggle to gain weight, a mass gainer is the best option. For those aiming for lean muscle growth without excessive weight gain, whey protein is ideal.

The best protein powder for women depends on individual goals, but whey protein and mass gainers are excellent options for those looking to build muscle and gain weight. Here are some top recommendations:
Whey Protein Options:

  • Per4m Whey: Great for muscle recovery and growth.
  • Optimum Nutrition Whey: Known for its quality and taste.
  • Mutant Whey: Provides a balanced amino acid profile.
  • USN Blue Lab Whey: Excellent mixability and performance.

Mass Gainer Options:

  • Mutant Mass Extreme: High in calories and nutrients for rapid weight gain.
  • Applied Nutrition Critical Mass: Packed with protein and carbs for recovery.
  • USN Hyperbolic Mass: Ideal for those struggling to gain weight with balanced macronutrients.

These products offer high-quality protein sources and essential nutrients to support your fitness goals.

Your Personalized Path to Peak Performance

Struggling to find the perfect supplements for your goals?

Let our experts guide you.

Simply fill out the form below, and we’ll craft a personalized recommendation just for you.

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“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