When you think of seaweed, you might picture sushi rolls wrapped in nori or maybe a tangled pile of beach debris. But there’s a whole world of edible seaweeds from the ocean that deserve a spot in your kitchen, and kombu is one of the most impressive. This thick, dark brown kelp has been a staple in Japanese cooking for centuries, and for good reason. Not only does it add a deep, savory flavor to soups and broths, but it also packs a serious nutritional punch that can support your health in ways you might not expect.

Let’s start with what makes kombu so special. Unlike many land vegetables, kombu grows in the cold, nutrient-rich waters of the Pacific Ocean. As it absorbs minerals from the sea, it becomes a concentrated source of iodine, which is essential for a healthy thyroid. Your thyroid uses iodine to produce hormones that regulate your metabolism, energy levels, and even your mood. Many American adults don’t get enough iodine from their regular diet, especially if they don’t eat much seafood or use iodized salt. Adding a strip of kombu to your cooking is a simple, natural way to close that gap. Just be mindful not to overdo it—a little goes a long way, and too much iodine can be counterproductive.

But kombu’s benefits go far beyond iodine. It’s also rich in calcium, magnesium, iron, and potassium. These minerals work together to support strong bones, healthy blood pressure, and proper muscle function. For anyone who struggles to get enough magnesium from foods like nuts and leafy greens, kombu offers a unique alternative. And because it’s a sea vegetable, it contains trace minerals that are harder to find on land, like zinc and copper, which play roles in immune function and cell repair.

One of the most exciting aspects of kombu is its fiber content. Kombu contains a type of soluble fiber called alginate, which has been studied for its ability to bind with heavy metals and toxins in the digestive tract, helping your body remove them before they cause harm. While we all want to avoid heavy metal exposure, tiny amounts can come from things like fish, rice, or even the air in some urban areas. The gentle detoxifying effect of kombu is a bonus that most other foods simply don’t offer. Plus, that same fiber feeds the beneficial bacteria in your gut, which is crucial for digestion, immunity, and even mental health. A happy gut truly makes a happier you.

Another standout compound in kombu is fucoxanthin, a carotenoid that gives the seaweed its brownish-green color. Research suggests fucoxanthin may help support healthy metabolism and fat oxidation. While it’s not a magic fat burner, incorporating foods like kombu into a balanced diet could give your metabolic system a helpful nudge. Think of it as one more tool in your wellness toolkit, not a quick fix. Pair it with regular movement and whole foods, and you have a recipe for sustainable health.

Now, you might be wondering how to actually eat kombu. It’s not something you’ll typically snack on raw like nori sheets. Instead, kombu shines as a flavor enhancer. One of the easiest ways to use it is to drop a 2-inch piece into a pot of simmering beans or stew. The kombu not only adds umami, but it also makes beans more digestible by breaking down some of the compounds that cause gas. It’s a clever trick that even your grandma would appreciate. You can also simmer kombu with mushrooms or vegetables to make a quick broth, then use that broth as a base for soups, rice, or ramen. The possibilities are endless.

For a more direct approach, you can buy dried kombu and rehydrate it to toss into salads or stir-fries. After simmering, the kombu itself becomes tender and can be sliced into thin strips. Some people even pickle it or enjoy it as a small side dish. If you’re new to seaweeds, start with a small amount and let your palate adjust. The flavor is earthy and savory, not fishy at all, so you might be surprised at how quickly you grow to love it.

Of course, there are a few things to keep in mind. Always source kombu from reputable brands that test for heavy metals, since seaweed can absorb contaminants from polluted waters. Look for organic options if possible. And if you have a thyroid condition or are pregnant, it’s wise to talk to your doctor before adding kombu to your daily routine. But for most healthy adults, incorporating a few strips of kombu each week is a safe, delicious way to boost your nutrient intake.

So the next time you’re in the grocery store, take a look in the international or natural foods aisle. Grab a package of dried kombu and bring a taste of the ocean into your home. Whether you’re simmering a pot of beans or making a warming broth, this humble seaweed delivers flavor, nourishment, and a host of health benefits that fit perfectly into a modern American lifestyle. It’s a small change with a big payoff—your body will thank you.