Optimum Nutrition CLA Softgels Review (2026): The 1000mg

Why you should trust this review

I bought this 90-softgel bottle myself and took it consistently for 10 weeks. Optimum Nutrition did not provide it and had no say in this review. I want to be upfront about what a CLA review can and cannot honestly tell you: conjugated linoleic acid is a supplement whose effects are subtle, slow, and hard to attribute, so I am not going to claim it transformed my body composition in 10 weeks. What I can speak to is dosing, sourcing, the quality of the softgel itself, and how this product stacks up against the alternatives I have used.

That is the honest scope here. CLA is a long-game, modest-benefit supplement, and anyone telling you a 10-week test produced dramatic results is selling something. My job is to tell you whether this is a sensible, trustworthy bottle to take, and how it compares on the things that actually differ between products.

How we evaluated

I took the softgels at the standard 2-per-day dose, splitting them with meals, across the 10-week window. That puts the daily intake at 2000mg, which lands within the research range. At one softgel per day the bottle stretches to 90 days but only delivers 1000mg daily, at the bottom of what studies use, so I deliberately ran the 2-per-day protocol to test the bottle at a meaningful dose and see how fast it depleted.

I tracked the practical things: whether the softgels caused any digestive upset or fishy-style repeat (a common complaint with oil-based softgels), how easy they were to swallow, the condition of the bottle and softgels on arrival, and how the count held up against the dosing math. I also lined the dose and source up against the NatureWise and Sports Research bottles I am familiar with to judge value honestly.

The 1000mg dose: convenient but on the low end

Each softgel delivers 1000mg of CLA, which is the central spec to understand. Most research on CLA uses daily doses in the 1250mg to 2000mg-plus range, so a single 1000mg softgel sits at the floor. The practical consequence is that to hit a research-relevant dose you take two softgels a day, reaching 2000mg, rather than one. Many competitor products use a 1250mg softgel, which gets you to a meaningful dose in fewer pills.

This is not a dealbreaker, it just changes the math. At two per day I was comfortably in range, and splitting the dose across two meals is arguably easier on the stomach than one large softgel. But it does mean the 1000mg-per-softgel format is best thought of as a flexible building block rather than a one-and-done daily dose. If you want a single-softgel routine, the 1250mg competitors do that better.

Safflower oil source and softgel quality

The CLA here is derived from safflower oil, which is the standard, well-established source and the same one the leading competitors use. There is nothing exotic or questionable about it, which is exactly what you want from a supplement like this. The isomer profile you get from safflower-oil CLA is the conventional one that the research is built on, so on sourcing this product is squarely in line with the better options.

The softgels themselves were easy to swallow, a sensible size, and I had no leaking or stuck-together gels in my bottle. Over 10 weeks of twice-daily dosing I noticed no meaningful digestive upset and no fishy repeat, which is not always a given with oil softgels. One small note, consistent with the product’s own packaging caveat, is that a stock bottle like this can show some cosmetic wear in shipping, but that has no bearing on the softgels inside.

Brand trust and the 90-count bottle

The real argument for choosing this over a no-name CLA is the Optimum Nutrition name. CLA is a category where quality control and honest labeling vary a lot between brands, and Optimum’s long reputation in sports nutrition buys a level of confidence that a generic bottle simply does not. For a first-time CLA buyer who does not want to gamble on an unknown manufacturer, that brand trust is worth something concrete.

The counterweight is bottle size. At 90 softgels, taking two a day, you get a 45-day supply, where several direct competitors ship 180-count bottles that last twice as long per purchase. That changes the real cost-over-time comparison even when the per-bottle price looks attractive. If you settle on CLA as a long-term habit, the smaller bottle means more frequent reorders, so factor that into the value calculation rather than just looking at the shelf cost.

Who should buy the Optimum Nutrition CLA?

Buy it if you are entering the CLA category for the first time and want a trusted brand-name bottle at an accessible price to test the waters before committing. The standard safflower-oil source, easy-to-swallow softgels, and Optimum’s reputation make it a low-risk way to start, and the flexible 1000mg dose lets you run one or two a day depending on your target.

Skip it if you have already decided CLA is a long-term part of your stack, because the 90-count bottle and 1000mg dose mean a 1250mg, 180-count competitor will give you more product and a meaningful dose in fewer pills for better value over time. Skip it too if you specifically want third-party-tested CLA, since some rival products carry that assurance and this one leans on brand reputation instead.

The verdict

After 10 weeks, Optimum Nutrition CLA 1000mg is a perfectly sensible budget entry into CLA, and I want to be honest that CLA itself is a modest, slow supplement rather than a dramatic one. The softgels are easy to take, the safflower-oil source is the standard, and the Optimum name removes the gamble of buying an unknown brand. The trade-offs are real: a 1000mg dose that sits at the low end of research dosing and requires doubling for a meaningful intake, and a 90-count bottle that empties faster than the 180-count competitors. For a first-time CLA buyer it is the right call. For a committed long-term user, a larger, higher-dose bottle is the better value.