What Should I Look For When Buying Fish Oil?īecause fish oil is so susceptible to rancidity, creating a high-quality fish oil is difficult, and it’s important to know that not all brands are created equal. If your fish oil has been exposed to any of these conditions, it’s time to ditch it and start with a fresh bottle. One day of being in the sun or stored in a hot car is all it takes for your fish oil to begin oxidizing. Its Been Under the Light or High Heatįish oils are highly susceptible to warm temperatures and light. Rancid fish oil breaks down quickly, increasing acidity in the stomach, commonly leading to those fishy-tasting burps. Research on oxidized fish oils shows that one of the most common signs of rancidity is a fishy aftertaste and fish-flavored burps (unpleasant, we know). Your Fish Oil has an Unpleasant After-Taste The moral of the story is, if your oil starts to smell like Seattle’s famous Pike Place Fish Market, take it as a cautionary sign to avoid consumption. Your Fish Oil Has a Strong Fishy Smellĭespite popular belief, fish oil is not supposed to taste fishy! Once oxidation happens, you may notice a fishy smell which is a sign of spoiling. Even if you’ve never opened the bottle, you’re charting into risky territory consuming a fish oil after the expiration date has passed. No matter how great a fish oil's packaging may be at preserving freshness, the expiration date is there for a reason. Here are some tell-tale signs to know when it’s time to toss out your fish oil: The Expiration Date Has Passed Several animal studies have also shown that oxidized fish oil can have severe health consequences, causing organ damage, inflammation, and insulin insensitivity that led to weight gain. By the end of the month, the women who took the extremely-oxidized oil had higher levels of LDL cholesterol, while the group with the fresh, unoxidized oil had lowered their levels of LDL. The month-long study featured two groups of women one group was given highly-oxidized fish oil, while the other group consumed a fresh fish oil. One study showed that rancid fish oil can increase “bad” cholesterol (LDL) levels. Though fresh fish oil has many benefits like reducing inflammation, boosting memory, and improving cardiovascular health, when fish oil goes bad, it doesn’t have a neutral effect, it actually does harm. Rancid fish oil is a huge cause for concern due to its negative health consequences. Compared to fresh fish oil, the altered chemical structures of these oxidized molecules can cause harm to your body. These polyunsaturated fats have multiple double bonds between their carbon atoms, which are prone to oxidation when they’re exposed to heat, light, or oxygen. Here’s why fish oil goes rancid so quickly: Fish oil is naturally abundant in EPA and DHA omega-3, which are polyunsaturated fats. That’s almost one out of every two fish oil products! In fact, a recent report showed that nearly 40% of fish oil brands on the market exceed the safe limits of oxidation. Unfortunately, yes, fish oil is very susceptible to going rancid. What Should I Look For When Buying Fish Oil?.To ensure that your fish oil is fresh, choose a product packaged in UV-blocking glass and that is tested for oxidation. You can spot the signs of rancidity by looking for a strong fishy smell and aftertaste, or a cloudy and splotchy appearance. This sensitive oil is prone to oxidation when exposed to light, heat, or oxygen, and once oxidation occurs, fish oil can cause more harm than benefit. Fish oil is highly effective at reducing inflammation, boosting memory, and improving cardiovascular health, but unfortunately, fish oil supplements can easily become rancid.
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