Ever feel like you’re eating enough but still not seeing the scale move in the right direction? Many people focus only on cutting calories to lose weight, but what about those aiming to build healthy mass? Fish oil, rich in those amazing omega-3 fatty acids, often gets all the praise for heart health and reducing inflammation. But can this popular supplement actually help you pack on pounds in a healthy way?
Navigating the world of fish oil for weight gain presents its own set of puzzles. You might wonder which type to buy, how much to take, or if it even works for building muscle instead of just adding fat. It’s confusing when so much advice seems to focus only on weight loss!
This post cuts through the confusion. We will explain exactly how omega-3s support your goals for healthy weight gain, discuss the best forms of fish oil for muscle building, and show you how to incorporate it smartly into your diet. Get ready to learn the secrets to using fish oil as a powerful tool in your mass-gaining journey.
Top Fish Oil For Weight Gain Recommendations
No. 1
Miracle Vet High-Calorie Weight Gainer for Dogs & Cats - Multivitamin Nutritional Supplement Gel, Omega Fish Oil, Calcium - Puppy, Senior, Prenatal Cat & Dog Vitamins, Supplements for Weight Gain
- HIGH-CALORIE WEIGHT GAINER for DOGS and CATS - Miracle Vet dog high-calorie weight gain multivitamin supplement is packed with calories and essential vitamins, and minerals to support overall pet health and formulated especially for multiple purposes, including senior dog supplements, dog prenatal vitamins, and dog electrolytes
- 29 VITAMINS & MINERALS - This cat and dog multivitamin is packed with 29 essential vitamins and minerals, including calcium for dogs and fish oil for cats, designed to support your pet's overall health and well-being. Ideal as senior dog vitamins, and dog food supplements, this versatile formula also works as a dog muscle builder and dog food topper for picky eaters ensuring your furry friend gets all the nutrients they need to thrive
- #1 INGREDIENT IS OMEGA-3 FISH OIL - Miracle Vet Weight Gain supplement comes packed with omega-3 fish oil, which promotes healthy skin and coat while providing a natural energy source. Ideal for cat, dog moms and pet care enthusiasts, this dog and cat supplement support the overall health of your furry family members. Additional fish oil health benefits: protects the heart, provides support for dry, flaky skin in allergy, helps slow down the progression of kidney disease, aids arthritic joints
- EASY TO USE NUTRITIONAL SUPPLEMENT - Our weight gainer for dog and cat multivitamin is simple to incorporate into your pet's daily routine, whether mixed with their regular dog food, used as a dog food topper for picky eaters, or added to water. Ideal for small breed dogs, senior dogs, and puppies, this dog and cat nutritional supplement is perfect for pet owners looking to improve their pet's health, muscle growth, and weight gain. Give your furry friend the care they deserve with Miracle Vet
- APPETITE STIMULANT for PETS - Supportive appetite stimulant for dogs and cats will entice even the most finicky eaters, ensuring they get the vitamins and nutrients they need to thrive, including dog electrolytes and calcium for dogs and cats. It caters to various pet needs, making it ideal for cat and dog care. From weight gain and appetite stimulation to senior dog care and prenatal support, this all-in-one formula is perfect for pet parents who want the best for their furry companions
No. 3
MIRACLE VET High-Calorie Weight Gainer for Dogs & Cats - Multivitamin Nutritional Supplement Gel, Omega Fish Oil, Calcium - Puppy, Senior, Prenatal Cat & Dog Vitamins, Supplements for Weight Gain
- HIGH-CALORIE WEIGHT GAINER for DOGS and CATS - Miracle Vet dog high-calorie weight gain multivitamin supplement is packed with calories and essential vitamins, and minerals to support overall pet health and formulated especially for multiple purposes, including senior dog supplements, dog prenatal vitamins, and dog electrolytes
- 29 VITAMINS & MINERALS - This cat and dog multivitamin is packed with 29 essential vitamins and minerals, including calcium for dogs and fish oil for cats, designed to support your pet's overall health and well-being. Ideal as senior dog vitamins, and dog food supplements, this versatile formula also works as a dog muscle builder and dog food topper for picky eaters ensuring your furry friend gets all the nutrients they need to thrive
- #1 INGREDIENT IS OMEGA-3 FISH OILOMEGA-3 FISH OIL - Miracle Vet Weight Gain supplement comes packed with omega-3 fish oil, which promotes healthy skin and coat while providing a natural energy source. Ideal for cat, dog moms and pet care enthusiasts, this dog and cat supplement support the overall health of your furry family members. Additional fish oil health benefits: protects the heart, provides support for dry, flaky skin in allergy, helps slow down the progression of kidney disease
- EASY TO USE NUTRITIONAL SUPPLEMENT - Our weight gainer for dog and cat multivitamin is simple to incorporate into your pet's daily routine, whether mixed with their regular dog food, used as a dog food topper for picky eaters, or added to water. Ideal for small breed dogs, senior dogs, and puppies, this dog and cat nutritional supplement is perfect for pet owners looking to improve their pet's health, muscle growth, and weight gain. Give your furry friend the care they deserve with Miracle Vet
- APPETITE STIMULANT for PETS - Supportive appetite stimulant for dogs and cats will entice even the most finicky eaters, ensuring they get the vitamins and nutrients they need to thrive, including dog electrolytes and calcium for dogs and cats. It caters to various pet needs, making it ideal for cat and dog care. From weight gain and appetite stimulation to senior dog care and prenatal support, this all-in-one formula is perfect for pet parents who want the best for their furry companions
No. 4
Barlean's Total Omega 3 6 9 Orange Crème Liquid Fish Oil Supplement with Borage and Flaxseed Oil, 2,400 mg of Omegas EPA and DHA Plus GLA for Joint and Heart Health, 8 oz
- LIQUID FLAX AND FISH OIL: You already know that Omega-3's are essential to a healthy diet. Barlean’s makes it easy with our blend of three premium oils, including fish oil, flax oil and pure borage oil, which offer a complete and balanced source of Omega 3, 6 and 9 fatty acids for heart and joint health, immune support and healthy skin and hair
- TASTE THE FRUIT, NOT THE FISH: Yummy fruity flavored Omega 3 oils with a creamy smoothie texture that both kids and adults love is the secret behind Barlean's Total Omega fish, flax, and borage oil liquid. 2,400mg of EPA, DHA, and GLA essential fatty acids per serving and no artificial flavors, colors or sweeteners. Triple omega supplement is dairy free, sugar free and non-GMO
- 3X BETTER ABSORPTION: We make our Seriously Delicious Orange Creme fish oil blend with a proprietary process that turns healthy oils into a creamy, delicious treat that is 3x more absorbable than standard fish oil supplements. Softgels can be hard to digest, so we created a liquid formula to provide Omegas without having to swallow bulky pills! And it's burpless
- SUGGESTED USE: Adults and children ages 4 and up: 1 Tbsp daily. Delicious straight off the spoon or in yogurt, oatmeal and smoothies. Refrigerate after opening. Keep out of reach of children and never give to pets
- A NAME YOU KNOW AND TRUST: Barlean's has been selling premium dietary supplements since 1989, that's more than 30 years of helping people live their healthiest lives! We are passionate about healthy oils and helping people! Proudly made in the USA
No. 5
Apetigen-Plus Appetite Stimulant for Weight Gain – Multivitamin with Iron, Zinc, L-Lysine & B-Complex – Appetite Booster Tablets for Adults & Kids 12+ – Sugar Free, No Fish Oil – 60 Count
- Comprehensive Appetite Support: Unlike simple weight gain gummies, these unflavored tablets combine L-Lysine, Iron, and Zinc with a full B-Complex (B1, B2, B3, B5, B6, B12) plus Vitamins C and E. This robust formula supports energy metabolism and acts as an effective appetite booster to help those struggling to eat enough calories.
- Daily Dosage for Adults & Teens (12+): Specifically formulated for adults and children ages 12 and older. This is a convenient alternative to messy syrups or weight gain powders. Simply take one tablet daily to support healthy weight gain goals.
- Optimal Absorption & Digestion: How should I take it? For the best results and to minimize any potential stomach sensitivity associated with iron supplements, take one tablet daily with food or immediately after a meal. This aids absorption and ensures the vitamins work effectively to support your metabolism and daily energy levels.
- Dietary Friendly & Sugar-Free: A great choice for those with dietary restrictions, Apetigen-Plus is sugar-free, gluten-free, and contains no fish oil, avoiding the unpleasant aftertaste found in some weight gain pills. Each bottle contains a 60-day supply of easy-to-swallow tablets, manufactured in the USA under strict GMP standards.
- Promotes Healthy Weight Management: Whether you are looking to gain weight for women or men, or need nutritional support during recovery, this supplement helps bridge nutrient gaps. By combining appetite-stimulating Lysine with essential vitamins, minerals, and amino acid L-Lysine, it supports the body's natural hunger signals better than standard multivitamins.
No. 6
Barlean's Omega 3 Fish Oil Liquid Supplement for Men and Women, 1080mg of EPA and DHA Fatty Acid, Promotes Brain & Heart Health - Non-GMO, Lemon Crème, 16 oz
- TASTE THE FRUIT, NOT THE FISH: Yummy fruity flavored fish oil with a creamy smoothie texture that both kids and adults love is the secret behind Barlean's Omega 3 fish oil liquid. Our omega supplement features a smooth and delectable Lemon Crème flavor, 1080 mg of EPA/DHA essential fatty acids per serving and no artificial flavors, colors or sweeteners. Our fish oil is dairy free, sugar free and non-GMO
- HIGH ABSORPTION WITHOUT FISH BURPS: We make Seriously Delicious Omega 3's with a proprietary process that turns wild caught, ultra purified fish oil into a creamy and delicious omega 3 supplement which is highly absorbable and free of mercury and other heavy metals. Because of our emulsified process Barlean's omega swirl is easier to digest, more absorbable, and doesn't result in fish burps
- HEALTHY DIET FOR PICKY EATERS: Omega-3's are essential to a healthy diet, that's why Barlean's has made nutrition easier for kids and adults by making natural supplements aimed at satisfying even the pickiest eaters. Each serving includes EPA and DHA fatty acids which may help to support brain, eye, heart, joint, and immune system health so that you can maintain an active and healthy everyday lifestyle
- JUST 1 TABLESPOON A DAY: Our burpless fish oil tastes great straight off of the spoon, drizzled over yogurt, or used in oatmeal or smoothies. For adults and children ages 4 and up, take 1 Tbsp daily. Keep out of reach of young kids ages 3 and younger, and never give to pets. Refrigerate after opening
- A NAME YOU KNOW AND TRUST: Barlean's has been selling premium fish oil Omega 3 supplements since 1989, which is more than 30 years of helping people live their healthiest lives! We are passionate about healthy oils and helping people. Proudly made in the USA
No. 7
iSatori Ultra CLA Omega 3 6 9, Natural Weight Loss Fat Burner, Muscle Toner with Conjugated Linoleic Acid, Omega 3 Fish Oil & Safflower, Stimulant-Free, 90 Softgels
- Weight Loss & Muscle Tone: When it comes to supporting weight loss while preserving muscle maintenance, iSatori Ultra CLA OMEGA packs a one-two punch acting as a fat burner and muscle toner - with exceptional support for areas like the hips, butt and thighs.
- Omega 3 6 9 Formula: Our advanced omega 3 6 9 formula includes EPA, DHA, and ALA. These high strength fish oil supplements for women and men provide essential fatty acids, aiding in metabolism boosting and enhancing overall wellness.
- Stimulant-Free Fat Burner: Ultra CLA + OMEGA is stimulant-free, making it perfect for stacking with other thermogenic fat burners, metabolism boosters, or your supplement stack.
- Build Your Best Body: Since 2001 iSatori's sports nutrition supplements have been trusted by professional athletes and fitness experts worldwide. We offer the innovation and quality you can be confident in using to crush all your exercise goals.
- Ideal for Athletes & Bodybuilders: iSatori Ultra CLA is a top choice for athletes serious about fat loss and muscle definition. It's a natural weight loss supplement for women, enhancing performance without relying on stimulants.
No. 8
Barlean's Omega 3 Fish Oil Supplements, 600mg Fish Oil Pills with EPA & DHA, Softgels for Joint, Brain, & Heart Health, Orange Flavored, 250 Count
- HOW DO YOU GET YOUR OMEGA 3’s: Omega 3 supplements promote heart, brain, eye & immune health. Fresh Catch Fish Oil supplements support healthy balanced systems and may promote healthy joint functions with 360mg EPA and 240mg of DHA per 2 softgel serving; 125 Servings Per Container
- ULTRA-PURIFIED HIGH POTENCY FISH OIL: Sustainably harvested from fresh, wild-caught, small-bodied fish in pristine waters, our softgels are ultra-purified, pharmaceutical grade fish oil in natural triglyceride form. Barlean's fish oil pills are always third party tested and free of mercury and other heavy metals
- FRESHER FOR BETTER ABSORBPTION: Barlean’s Patented "Fresh Tech" Technology allows our freshly made fish oil pills to get to market faster with optimal nutritional benefits. 1000mg Omega 3 fish oil pills are the ideal solution for busy lives or folks who like to count out their vitamins in advance
- SUGGESTED USE: Take 2-6 softgels daily with a meal. Keep bottle tightly closed and store in a cool, dry place, out of reach of children. Ideal for Men & Women in all stages of life. Also available is our Omega 3 fish oil liquid formula for those that prefer a liquid alternative.
- A NAME YOU KNOW AND TRUST: Barlean's has been selling premium dietary supplements since 1989, that's more than 30 years of helping people live their healthiest lives! We are passionate about healthy oils and helping people! Proudly made in the USA
The Smart Shopper’s Guide to Fish Oil for Weight Gain
Thinking about using fish oil to help you gain weight? It’s a popular supplement. But not all fish oils are the same. This guide will help you pick the best one for your goals.
Key Features to Look For
When you shop for fish oil, certain things matter most. These features tell you if the product is right for gaining healthy weight.
1. Omega-3 Content (EPA and DHA)
- High Concentration: Look closely at the label. You want a high amount of EPA (eicosapentaenoic acid) and DHA (docosahexaenoic acid) in each serving. These are the main healthy fats.
- Serving Size Check: Don’t just look at the total fish oil amount. Check how much EPA and DHA you actually get per pill or spoonful. More is usually better for hitting your calorie and fat goals.
2. Purity and Testing
- Third-Party Tested: The best brands pay independent labs to test their oil. This proves the oil is clean.
- Heavy Metal Free: Fish can hold toxins like mercury. Ensure the label states the product is tested and free from heavy metals.
3. Form of Triglycerides
- Triglyceride Form: Fish oil comes in different forms. The natural triglyceride form is usually absorbed best by your body. Ethyl esters are cheaper but might not work as well.
Important Materials and Sourcing
Where your fish oil comes from affects its quality and how good it is for you.
Fish Source
- Small, Oily Fish: Look for oils sourced from small fish like anchovies, sardines, or mackerel. These fish are lower on the food chain and usually have less mercury than larger fish like tuna.
- Sustainable Sourcing: Good companies care about the ocean. Look for certifications that show they catch fish responsibly.
Capsule Material (If applicable)
- Gelatin or Plant-Based: If you take capsules, check what the shell is made of. Most use fish gelatin, but vegetarians need plant-based options.
Factors That Improve or Reduce Quality
Quality control is very important for fish oil. Bad oil can make you feel sick or not give you the results you want.
Quality Boosters
- Freshness: Fish oil goes bad (oxidizes) easily when exposed to light, heat, or air. Good brands use special bottling to keep the oil fresh.
- Antioxidants Added: Some high-quality oils include Vitamin E (tocopherols) to prevent the oil from going rancid.
Quality Reducers
- Rancidity (Bad Smell/Taste): If the oil smells very “fishy” or tastes bitter, it is likely rancid. Do not use it. Rancid oil offers no benefits.
- Fillers: Cheap oils often use soybean or sunflower oil to bulk up the product. This lowers the amount of beneficial Omega-3s you receive.
User Experience and Use Cases for Weight Gain
Fish oil helps with weight gain indirectly. It provides healthy calories and can help your muscles use protein better. This is key when you are trying to build mass.
How Users Take It
- With Meals: Always take fish oil with your main meals, especially those containing other fats. This helps your body absorb the Omega-3s better.
- Dosage Matters: For weight gain, you might need a higher dose than someone just taking it for heart health. Follow the directions or talk to a nutritionist.
Expected Experience
- Calorie Boost: Each gram of pure fish oil adds about 9 calories. Taking several servings daily can add 100-200 clean calories to your diet.
- Digestive Comfort: High-quality oil should not cause severe burping or stomach upset. If it does, try taking it with a big meal or switching brands.
10 Frequently Asked Questions (FAQ) About Fish Oil for Weight Gain
Q: Can fish oil make me gain fat instead of muscle?
A: Fish oil provides healthy calories. If you eat too many total calories from any source, you will gain fat. Fish oil helps ensure the calories you eat support muscle growth, but you still need a proper diet and training plan.
Q: How much fish oil should I take daily for weight gain?
A: Most people trying to gain weight aim for a total of 2 to 4 grams of combined EPA and DHA daily. Always start low and increase slowly. Check the product label carefully.
Q: Is liquid fish oil better than softgels for gaining weight?
A: Both work well if the concentration is high. Liquid is often easier to consume in very large doses needed for weight gain, but softgels are less messy.
Q: When is the best time to take fish oil for weight gain?
A: Take it with your largest meals. Splitting the dose between breakfast and dinner often helps prevent stomach issues.
Q: Will fish oil cause an increase in appetite?
A: Some people report a slight increase in appetite, which can be helpful for weight gain. However, this effect varies greatly from person to person.
Q: What is the difference between cod liver oil and standard fish oil?
A: Cod liver oil contains Vitamins A and D. Standard fish oil focuses only on EPA and DHA. If you are taking many other supplements, stick to standard fish oil to avoid getting too much Vitamin A.
Q: How long does it take to see results from fish oil for mass gain?
A: Fish oil supports your body’s ability to build muscle over time. You will not see huge changes in a week. Give it at least 4 to 6 weeks while sticking to your diet and workouts.
Q: Does the “fishy burp” mean the oil is bad?
A: The burp means the oil might be breaking down too soon in your stomach. It usually signals low quality or taking it on an empty stomach, not necessarily that it is completely spoiled.
Q: Should I choose concentrates or standard fish oil?
A: For weight gain, choose concentrates. They give you more EPA/DHA per pill, meaning you take fewer pills to reach your needed high dosage.
Q: Can I get enough Omega-3s just by eating fish?
A: You can, but it is very hard to eat enough fatty fish (like salmon) every single day to hit the high doses needed to significantly support a weight gain routine.