Key Takeaways

• Cooking boosts nutrient absorption in certain vegetables. Heat helps break down cell walls and antinutrients, making important compounds-like beta-carotene in carrots, lycopene in tomatoes, and iron and calcium in spinach-more bioavailable for the body to absorb.
• Some veggies become easier to digest when cooked. Cooking vegetables such as kale and asparagus softens their tough fibers, enhances antioxidant availability, and supports digestion-especially for those with sensitive stomachs.
• Gentle cooking methods preserve maximum nutrition. Techniques like steaming, sautéing, or roasting with healthy fats (like olive oil) improve nutrient absorption while minimizing loss of water-soluble vitamins, helping you get the best of both flavor and health.

Why Cooked Vegetables Can Be Healthier Than Raw Ones

Eating vegetables is undoubtedly one of the best things you can do for your health. But if you want to get the most out of your veggies, you'll want to cook some of them first. As it turns out, heat can make certain nutrients more bioavailable-i.e., better absorbed by the body. Cooking can also make the actual vegetables easier to digest, which is helpful if you have a sensitive stomach.

What vegetables are healthier cooked vs. raw, exactly? To find out, we asked registered dietitians to name veggies that are more nutritious when cooked, along with ways to enjoy them at home.

Meet the Expert

• Lauren Manaker, MS, RDN, LD, is a registered dietitian and the founder of Nutrition Now
• Victoria Whittington, RDN, is a registered dietitian based in Orange County, California

1. Carrots

Carrots benefit from cooking because heat softens their tough cell walls, boosting the availability of beta-carotene," explains registered dietitian Lauren Manaker, MS, RDN, LD. This is notable because beta-carotene turns into vitamin A-a key nutrient for healthy vision and immune function-in the body. Try roasting, steaming, or boiling carrots, which will also bring out their natural sweetness, per Manaker. While you're at it, use healthy fats (like olive oil) when cooking the vegetable, suggests registered dietitian Victoria Whittington, RDN. Why? Beta-carotene is a fat-soluble nutrient, meaning it needs fat to be absorbed.

2. Mushrooms

"Mushrooms are packed with antioxidants [that have] anti-inflammatory and immunity-boosting benefits," Whittington explains. "These nutrients are hard for the body to digest when eaten raw, but cooking helps increase their bioavailability," she adds. Likewise, the application of heat increases the bioavailability of vitamin D and beta-glucan-a type of fiber-in mushrooms, per Whittington. To get the most nutrients (and flavor) out of the "fun guys," try sautéing, roasting, or grilling them, Whittington suggests.

3. Tomatoes

If you love tomato sauce, you'll be happy to know that tomatoes are more nutritious when cooked. "Heat breaks down their cell walls, releasing and converting lycopene into a more bioavailable form," explains Whittington. ICYDK, lycopene is a powerful antioxidant linked to heart health and lower inflammation levels, Whittington notes. Cooking tomatoes with a bit of olive oil enhances absorption even more, as lycopene is a fat-soluble compound.

4. Asparagus

"Asparagus becomes even more nutrient-packed when cooked, as heat enhances the availability of antioxidants like ferulic acid and vitamins A, E, and K," shares Manaker. Vitamins A and E support vision and immune function, while vitamin K promotes healthy blood clotting and bone strength.

5. Kale

The nutrients in kale may be more bioavailable when cooked. "Heat helps release minerals like calcium and magnesium while breaking down its tough fibers, making it easier to digest," Manaker says.

6. Spinach

Another vegetable that's healthier when cooked is spinach. "Spinach is an excellent source of essential minerals like iron and calcium, but raw spinach contains oxalic acid, which binds to these nutrients and reduces absorption," Whittington explains. But light cooking (think steaming or sautéing) breaks down some of these oxalates, making the minerals more readily available during digestion.