Best 10 CLA Supplements In 2025

CLA supplements provide a concentrated form of conjugated linoleic acid, which is a fatty acid derived from safflower oil. These supplements may help support fat metabolism, preserve lean body mass, and potentially support a healthy immune system.

However, there are some formulation differences between CLA supplements, such as the ratio of active CLA isomers, the total amount of CLA per serving, and the inclusion of carrier oils or stabilizers. These factors may influence the efficacy and absorption of CLA between different CLA supplements.

This blog post discusses the 10 best CLA supplements available, based on formulation integrity, manufacturing standards, customer feedback, and value for money. We also included essential considerations and potential side effects you need to consider before opting for CLA supplementation.

10 Best CLA Supplements

1. Sports Research – CLA 1250

   

   Sports Research CLA 1250 provides a concentrated dose of conjugated linoleic acid. It’s one softgel can give you 1,187mg of CLA, providing 180 softgels per jar. It may be particularly helpful if you are seeking to preserve lean muscle while supporting fat oxidation.

   Research suggests that conjugated linoleic acid may influence the activity of enzymes that aid in fat metabolism. These include carnitine palmitoyltransferase I (CPT-1), which may help move fatty acids into the mitochondria so they can be used for energy, and lipoprotein lipase (LPL), which might affect how fat is stored in the body. CLA may help modulate these enzymes, which might help reduce fat accumulation over time, especially when paired with regular exercise and balanced nutrition.

   The makers state that Sports Research CLA 1250 has a non-stimulant formula, without caffeine or other artificial stimulants. For use, the manufacturers suggest consuming one Sports Research CLA 1250 softgel three times daily, preferably with food.
   

   Pros

   • Contains 95% active CLA for better effectiveness and absorption.
   • Might support a higher muscle-to-fat ratio.
   • Could help support cardiovascular health.
   • Offers a gluten-free and IGEN Non-GMO Tested formula, supporting compatibility with diverse dietary needs.

   Cons

   • May trigger side effects like stomach upset or abdominal pain during initial use.
   • Could raise the risk of developing insulin resistance.

2. NatureWise – CLA 1250

   

   NatureWise CLA 1250 may aid in fat oxidation that might support your weight management and fitness goals. According to the official site, each softgel delivers CLA (extracted from safflower oil) standardized to 80% potency.

   Conjugated linoleic acid (CLA) may support thermogenesis, which is your body’s process of generating heat and burning calories. Such effects may promote your body’s natural energy expenditure, which might help contribute to your weight management goals.

   NatureWise CLA 1250 may also contribute to improved exercise recovery and balanced insulin response, which may further support your fitness efforts. The makers state that NatureWise CLA 1250 is free from common allergens, such as gluten, dairy, soy, corn, tree nuts, eggs, and shellfish.
   

   Pros

   • Could help boost metabolism, aiding in the body’s natural calorie-burning processes.
   • Might help minimize cravings and support appetite control.
   • Undergoes third-party testing for purity and safety.
   • Provides options to choose from bottles with 1250mg and 1300mg CLA concentrations.

   Cons

   • Might cause dizziness or headaches.
   • Prolonged use may lead to liver fat accumulation (fatty liver).

3. Bulk Supplements – CLA Softgels

   

   According to the official site, Bulk Supplements CLA provides 300 softgels per jar, with each serving (two softgels) delivering 2000mg of CLA complex, standardized to contain 70% of conjugated linoleic acid content.

   Bulk Supplements CLA softgels may help reduce LDL (bad cholesterol) and increase HDL (good cholesterol), which could improve your blood lipid profiles. Conjugated linoleic acid may also help lower triglyceride levels and reduce systemic inflammation by modulating cytokines like TNF-α, which might improve blood circulation.

   BulkSupplements CLA may also support immune health by helping suppress inflammatory markers and improving your body’s defense system. For use, the makers suggest taking two Bulk Supplements CLA softgels with 8–12 ounces of water, preferably with meals, to enhance absorption.
   

   Pros

   • May help boost endurance by increasing muscular energy via improved fat oxidation.
   • Does not contain additives like dairy, yeast, or added sugars.
   • Opting for a subscription may provide an extra 10% discount on the retail price.

   Cons

   • Variations in results and effectiveness.
   • May trigger gastrointestinal issues, such as heartburn or indigestion.

4. Bronson – CLA 3000

   

   According to the official site, each serving (2 capsules) of Bronson CLA provides 3000mg of safflower oil, standardized to contain 75–85% active conjugated linoleic acid. It aims to help boost endurance, support metabolism, and strengthen the immune system.

   CLA may stimulate AMPK, a cellular energy sensor that boosts glucose uptake and fatty acid oxidation during low-energy states. Such a mechanism may help your body oxidize stored fat as a fuel source, which could promote metabolic efficiency and endurance. For use, the makers suggest consuming 2 Bronson CLA 3000 capsules twice daily, preferably with food.
   

   Pros

   • Provides the option to choose from bottles with 90, 120, or 300-count servings.
   • Has antihypertensive properties that may potentially lower elevated blood pressure levels.
   • Could support better recovery and reduce muscle loss during exercise.

   Cons

   • Might lead to dry skin or facial irritation, especially during initial use.
   • Could trigger muscle cramps or spasms, often in the legs or neck.

5. Primaforce – Max CLA

   

   Primaforce Max CLA aims to support your metabolic health and body recomposition goals when taken alongside a structured diet and regular exercise. As per the official site, each 3-softgel serving of Primaforce Max CLA features 2400mg of CLA, with 180 softgels per bottle.

   Research suggests that conjugated linoleic acid may activate a protein called PPAR-γ, which helps your body influence lipid and blood sugar metabolism. It may also increase another protein called GLUT4, which could move sugar from your blood into your cells. Such effects might contribute to more stable blood sugar levels.

   As per the official site, Primaforce Max CLA excludes preservatives, artificial colors, fillers, and artificial flavors in its formulation. It may ensure compliance with diverse dietary needs.
   

   Pros

   • Might help reduce triglyceride levels.
   • Could enhance antibody response, thereby supporting immunity.
   • Non-stimulating formula may allow safe use without causing jitters or energy crashes.

   Cons

   • May cause gastrointestinal tract irritation.
   • Not safe for use during pregnancy or breastfeeding.

6. Purity Labs – CLA 4500

   

   Purity Labs CLA 4500 aims to suppress frequent food cravings, promote lean muscle development, and enhance energy levels. As per the official site, one bottle of Purity Labs CLA 4500 contains 180 softgels, with 4500mg of non-GMO safflower oil per 3-softgel serving (standardized to 80% CLA).

   Research suggests CLA may improve lipid metabolism and enhance endothelial function, which could support healthy blood vessel activity. CLA supplementation may also lower markers of inflammation, such as C-reactive protein (CRP), thereby minimizing the risk of cardiovascular disease.
   

   Pros

   • May provide energy and recovery support when used as a pre- or post-workout.
   • Could support radiant skin by lowering inflammation and oxidative damage.
   • Made in the USA in a GMP-certified facility, ensuring strict quality and manufacturing standards.

   Cons

   • Does not maintain any transparency about its refund policy.
   • Prolonged use might contribute to restlessness or sleep disturbances.

7. Force Factor – CLA

   

   Force Factor CLA 1000 may help support fat-burning and fitness goals by promoting metabolism and enhancing fat oxidation. According to the official site, one softgel contains 1000mg of CLA Matrix, with 90 softgels per container.

   Studies indicate that conjugated linoleic acid (CLA) may increase leptin sensitivity, a hormone that helps your brain recognize fullness. It may also reduce ghrelin levels, lowering your urge to eat. Such hormonal balance may support better appetite control and result in fewer cravings throughout the day. CLA may also encourage your body to metabolize stored fat for energy, which may help fuel your workouts and improve endurance.

   The makers state that Force Factor CLA 1000 softgels do not contain gelatin, which could make the formulation compatible with the dietary preferences of vegans/vegetarians.
   

   Pros

   • May help decrease cravings, thereby promoting better dietary adherence.
   • Provides only 10 calories per softgel.
   • Might help increase muscle mass and strength over time.

   Cons

   • Contains FD&C Yellow #5, an artificial dye that may cause sensitivities.
   • Large softgel size may be difficult to swallow for some users.

8. GNC Total Lean – CLA Supplement

   

   GNC Total Lean CLA aims to help you fuel your metabolism, improve lean muscle tone, and support your fitness goals without relying on stimulants. As per the official site, GNC Total Lean CLA provides 25 calories and 2000mg of conjugated linoleic acid (CLA) per 2-softgel serving.

   CLA from GNC Total Lean may help boost energy levels by enhancing mitochondrial fatty acid oxidation. It could help break down stored fat into free fatty acids, which might then be turned into ATP, the main source of energy your body uses. Such effects might help increase endurance and help lower physical fatigue.
   

   Pros

   • May protect against oxidative stress and excessive inflammation.
   • Could support bone health by increasing bone mineral density.
   • Offers a sugar-free, dairy-free, and soy-free formula.

   Cons

   • Is comparatively more expensive than CLA supplements from other brands.
   • May potentially trigger allergic reactions like rashes, swelling, or vomiting.

9. Zazzee Naturals CLA 3600

   

   According to the official site, each serving (3 softgels) of Zazzee Naturals Extra Strength CLA features 3600mg of safflower oil, standardized to contain at least 80% CLA. The Zazzee Naturals Extra Strength CLA may be helpful if you are seeking to maintain a healthy lean muscle mass to fat ratio while boosting endurance.

   The manufacturer states that Zazzee Naturals Extra Strength CLA 3600 is formulated with vegan, non-GMO, and gluten-free ingredients. It also undergoes third-party lab testing to verify the quality and potency of the formula.
   

   Pros

   • The formulation maintains USDA Organic certification standards of production.
   • Offers a lifetime money-back guarantee on purchases.
   • Provides 180 softgels per jar, which may typically last a 60-day supply.

   Cons

   • May irritate your gastrointestinal tract, potentially causing bloating and flatulence.
   • Could negatively interact with NSAIDs or blood thinners like warfarin.

10. Deal Supplement – CLA 3000

    

    Deal Supplement CLA 3000 might help provide mild thermogenic effects, which may assist your body in burning more calories while improving energy levels. As per the official site, Deal Supplement CLA provides 3000mg of non-GMO safflower oil, which is standardized to contain 80% active CLA.

    Conjugated linoleic acid (CLA) may reduce muscle catabolism. It could also enhance fatty acid oxidation, helping your body in burning the stored fat as energy instead of muscle tissue.
    

    Pros

    • Could boost energy levels without triggering jitters or energy crashes.
    • Offers a 60-day unconditional refund policy on purchases.
    • Maintains transparency in packaging and labeling.

    Cons

    • The recommended 3-sofgel daily dose may be inconvenient for some users.
    • Some consumers found the taste of softgels unappealing.

What Are CLA Supplements?

Conjugated linoleic acid (CLA) is known as a naturally occurring fatty acid primarily found in the fat of meat and dairy products, such as beef and cheese. Unlike dietary CLA from whole foods, CLA supplements are typically derived from plant oils like safflower or sunflower oil and provide a more concentrated dose of the compound.

Usually, CLA supplements are available in softgel capsule form, potentially making them easy to consume and dosage-consistent. However, liquid and powdered forms of CLA formulations also exist. The concentration of CLA might vary, with many supplements providing around 1,000mg– 3,000mg of CLA content per serving.

Studies conducted on conjugated linoleic acid (CLA) indicated improvements in fat loss. The analysis found that a daily dose of 3.2 grams of CLA resulted in a modest reduction in body fat compared to placebo groups. However, the fat-loss effects tended to plateau with prolonged use, suggesting that the most noticeable benefits may occur during the initial phase of supplementation.

Side Effects of CLA Supplement

1. Might Cause An Upset Stomach

   CLA supplementation may cause you to experience digestive discomfort, such as nausea, cramping, bloating, or diarrhea, especially during initial use. Your body absorbs polyunsaturated fatty acids by forming micelles, a process that depends on bile acids from your liver. Excessive use of CLA supplements may exceed the digestive capacity of your bile acids. As a result, the leftover fats may irritate your intestinal lining, increase intestinal contractions, and trigger symptoms like cramps or diarrhea.

   CLA supplements may also alter the levels of gut hormones like cholecystokinin (CCK) and peptide YY, which may speed up how fast food leaves your stomach. The rapid gastric emptying may cause discomfort, early fullness, or queasiness.

2. Might Develop Insulin Resistance

   Taking CLA supplements, especially those with a high concentration of the trans-10, cis-12 isomers, may increase your risk of developing insulin resistance. CLA supplements may disrupt the activity of the PPARγ receptor that influences insulin signaling. Suppressed PPARγ activity may cause your body to retain more sugar and fatty acids in your bloodstream. These fatty acids may build up in organs like the liver and muscles, where they could interfere with insulin receptor function.

   Insulin resistance triggered by CLA supplementation may cause fluctuations in your blood sugar levels and compromise your insulin function. Such effects might raise your risk of developing blood sugar-related complications like prediabetes or type 2 diabetes.

3. May Cause Inflammation

   Even though CLA supplements are promoted for their anti-inflammatory effects, they may increase inflammation in your body. CLA formulations may raise levels of pro-inflammatory cytokines like TNF-α, IL-1β, and IL-6. These substances are made by fat tissue and immune cells called macrophages, and when their levels rise, your body enters a state of chronic low-grade inflammation.

   CLA supplements may put stress on your fat cells by disrupting the part of the cell that helps fold and process proteins, called the endoplasmic reticulum. When the system gets overwhelmed, it may trigger inflammation-related genes, causing the release of inflammatory substances in your body.

   Increased inflammation from CLA supplements may put you at greater risk for problems like insulin resistance, weight gain, and metabolic syndrome.

4. May Cause Fatigue

   You might feel unusually tired or experience headaches while using CLA supplements, which might impact your daily functioning. CLA supplements signal lipid breakdown in fat tissue, potentially releasing free fatty acids into your bloodstream. The sudden increase may overwhelm your cells’ mitochondria (the parts responsible for energy production) and an increase in reactive oxygen species (ROS). Such changes may cause cellular stress and leave you feeling physically fatigued.

   CLA supplements may also interfere with glucose metabolism by reducing insulin sensitivity or altering how your body metabolizes glucose for energy. The disruption might contribute to blood sugar fluctuations, which may trigger headaches.

How Did We Evaluate The Best CLA Supplements?

1. Price and Value

   When evaluating CLA supplements, we analyzed the pricing of all 10 CLA formulations by quantity to determine their overall value. Deal Supplement CLA 3000 is priced at $19.99 for a bottle with 240 softgels, equating to a cost of $0.08 per softgel. It is followed by Force Factor CLA, which provides a single jar (90 softgels) for $7.99. Meanwhile, Primaforce Max CLA costs $17.99 for one bottle that provides 180 softgels, translating to a cost of around $0.10 per softgel.

   Zazzee Naturals Extra Strength CLA 3600 is priced at $19.97 for 180 softgels, which may provide a higher potency formula while maintaining a cost of about $0.11 per softgel. It is followed by NatureWise CLA 1250, which is priced at $21.99 for one jar with 180 softgels. Meanwhile, the Sports Research CLA 1250 formulation costs $25.45 for one jar (with 180 softgels).

   Bulk Supplements CLA Softgels are priced at $18.97 for a bottle with 120 softgels, translating to a per-softgel cost of around $0.158. Despite the lower price, the smaller bottle size may reduce its long-term value than higher-count CLA formulation options. Bronson CLA 3000 is priced at $14.97 for 90 softgels, equating to a cost of $0.166 per softgel. Meanwhile, Purity Labs CLA 4500 provides one bottle (with 180 softgels), priced at $29.97, making it one of the pricier formulations.

   However, GNC Total Lean CLA Supplement is the most expensive CLA supplement on the list. It provides one bottle with 180 softgels for $49.99, equating to a cost of around $0.277 per softgel.

2. User Feedback

   In our evaluation, we analyzed detailed customer reviews of all 10 CLA formulations on Amazon, focusing on reported benefits, side effects, and customer satisfaction.

   Sports Research CLA 1250 earned approval for its 95% CLA concentration, with users highlighting improvements in energy, appetite control, and body composition when pairing it with consistent workouts and a balanced diet. However, some users expressed doubts about its direct fat-burning effect, noting inconsistent results. Customers who tried NatureWise CLA 1250 appreciated the formula for supporting fat loss without muscle loss, managing cravings, and improving digestion. Yet, a few users reported mild digestive discomfort and minimal energy enhancement.

   Users who tried Bronson CLA 3000 praised its high-dosage formula, highlighting its support in fat loss, reduced bloating, and increased energy. However, some consumers criticized the large capsule size and taste of Bronson CLA 3000. Deal Supplement CLA 3000 received a favorable response on Amazon, with most consumers appreciating its ability to support intermittent fasting and its smaller capsule size. On the negative side, some users experienced delayed or insignificant results despite consistent use of Deal Supplement CLA 3000.

   Customers who tried Zazzee Naturals Extra Strength CLA 3600 appreciated its affordability, appetite-suppressing effects, and ease of use, although some customers noted underwhelming energy benefits and concerns over packaging quality during shipping. Meanwhile, consumers experienced better portion control and sustained energy after using Purity Labs CLA 4500. On Amazon, Primaforce Max CLA was commended for its quality, effectiveness when paired with exercise, and user-friendly softgel format. That said, a few customers noted a slower response period and suggested that bulk purchasing options might be more cost-effective.

   GNC Total Lean CLA was positively reviewed for supporting targeted fat loss, especially in areas like the midsection and chin. On the downside, a few users experienced digestive discomfort with full dosages. Consumers who tried Force Factor CLA experienced benefits like appetite suppression, waistline fat reduction, and joint comfort. However, some users expressed concerns about potential fillers and experienced digestive issues.

   Bulk Supplements CLA Softgels appealed to Amazon users seeking a minimalist, filler-free formulation. However, some users noted a lack of significant results, while others were discouraged by the need to take multiple capsules daily.

3. Returns and Refund Policy

   When evaluating the best CLA supplements, we assessed the returns and refund policies of each brand as an important indicator of customer service reliability. Zazzee Naturals offers a Lifetime Money Back Guarantee on all purchases, offering long-term flexibility in returns. It is followed by Bronson, which allows returns of unused portions within one year of purchase for a refund, exchange, or credit, excluding shipping costs.

   NatureWise provides a 60-day return window and accepts returns on both opened and unopened products for any reason, refunding the full purchase price via the original payment mode, minus any shipping and handling fees. Deal Supplement also offers a 60-day return period under an Unconditional Money Back Guarantee, applicable in cases of product quality concerns or adverse health-related reactions.

   Sports Research features a 45-day return period from the date of shipment. Returns require a valid receipt and return authorization number (RMA), and you are responsible for return shipping. The brand claims to process refunds within 5–7 business days after the returned item is received. Bulk Supplements allows returns within 30 days from the invoice date, offering full refunds on unopened items and partial refunds on opened items based on the smallest unit price. Shipping costs and discounts are not reimbursed.

   Brands like Primaforce, Force Factor, and GNC Live Well each offer a 30-day return policy with varying terms. Primaforce requires that items remain unused, in their original package, and accompanied by proof of purchase, with refund processing typically taking up to 10 business days. Force Factor limits returns to unopened and unused products in original packaging, requiring an RMA for processing, typically processed within 5–7 business days. GNC permits returns of used or unused items within 30 days, provided they are in good condition with original boxes and paperwork, although shipping and other charges are not refunded.

   On the other hand, Purity Labs does not disclose a return or refund policy publicly, which may create uncertainty regarding post-purchase support.

Frequently Asked Questions

1. Do CLA Supplements Made from Safflower or Sunflower Oils Have Varying Effects?
   Yes, CLA formulations from different oils may produce varying effects due to differences in isomer content. Safflower-derived CLA typically has more of the t10, c12 isomer, which is linked to fat loss and improved insulin sensitivity. Sunflower-derived CLA supplements tend to contain more of the c9, t11 isomer, associated with anti-inflammatory benefits and better lipid metabolism.
2. Are There Any Cardiovascular Risks Linked to CLA Use?
   Yes, prolonged or excessive use of CLA supplements might increase oxidative stress or alter cholesterol ratios. In some cases, they might also lower HDL (good cholesterol) and raise LDL (bad cholesterol). Such effects might potentially raise the risk of experiencing atherosclerosis and even heart disease.
3. Can CLA Supplementation Help Support Keto or Low-Carb Diets?
   CLA supplements do not contain carbs and may be technically compatible with low-carb diets. However, they should not be relied on as a major metabolic booster. Whole-food fats may offer better nutritional benefits along with keto or low-carb diets.
4. Do CLA Supplements Oxidize or Degrade Easily Over Time?
   Yes, like many fatty acid supplements, CLA may oxidize if exposed to prolonged heat, air, or light. Rancid oils in CLA may produce harmful compounds. Proper storage in cool, dark places is essential. Expired or poorly stored supplements should be discarded.

Conclusion

Conjugated linoleic acid (CLA) supplements have the potential to support energy levels, boost metabolism, and promote fitness goals. They may be particularly beneficial if you’re aiming to lower body fat while maintaining lean muscle mass during caloric restriction or a structured exercise routine.

That said, CLA supplementation is not without drawbacks. You may experience side effects like digestive discomfort (bloating, nausea, and diarrhea), fatigue, headaches, or changes in insulin sensitivity. Prolonged use of high-dose CLA formulations may also increase oxidative stress and inflammation in your body, which may trigger insulin resistance, liver damage, or an increased risk of developing metabolic syndrome.

Before choosing a CLA supplement, you should consider the source and form (such as Tonalin® or safflower oil-derived CLA), the ratio of active isomers (c9,t11 vs. t10,c12), and whether the supplements have undergone third-party testing for quality and potency.

Sustainable improvements in body composition rely on more than just CLA supplementation. Following a structured routine that includes both resistance training, such as weightlifting, and aerobic activity, like brisk walking and cycling, may help preserve lean muscle mass.

Consuming a fiber-rich diet, sourced from whole grains, lentils, flaxseeds, leafy greens, and cruciferous vegetables, may help complement CLA formulation’s appetite-suppressing effects while supporting fat metabolism. When used alongside these targeted lifestyle strategies, CLA supplements may promote better fat oxidation and contribute to your fitness goals.