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They're abundant in foods like walnuts, seafood, fatty fish, and certain seed and plant oils. They're subdivided into three types: alpha-linolenic acid (ALA), eicosapentaenoic acid (EPA), and docosahexaenoic acid (DHA).
The CDC issued a recall alert for romaine lettuce, pictured above, from Salinas, Calif. eakkkk / iStock / Getty Images Plus
The Centers for Disease Control (CDC) has issued a stern order for any romaine in your fridge that comes from Salinas, Calif. Throw it out. If you don't know where it comes from, throw it out. If you have a salad mix that contains romaine, throw it out. If you're not sure, throw it out. Then scrub your fridge clean, according to a statement the CDC put out on Friday.