A half cup (30 grams) of fresh, chopped parsley gives you about 2 grams of carbs, less than 1 gram of fat, 1 gram of protein, and 1 gram of fiber. Parsley also provides 53% of the reference daily intake (RDI) of vitamin C, 108% of the RDI for vitamin A, and 547% of the RDI for vitamin K .
Vitamin K is crucial for blood clotting and bone health. Vitamins A and C have advantageous antioxidant properties  . What’s more, parsley brings plenty of flavor and few calories.
2. Antibacterial Properties
When used as an extract, parsley seems to have antibacterial properties. Test-tube studies demonstrate antibacterial activity against molds, yeast, and a common bacteria called S. aureus .
Another study showed parsley extract might prevent potentially harmful bacteria like Salmonella and Listeria from growing in food .
Parsley contains powerful antioxidants like vitamin C and flavonoids that are especially beneficial for your health. Free radicals are molecules that can cause cellular damage, and antioxidants combat these harmful free radicals and protect your cells. Your body needs the right balance of free radicals and antioxidants to maintain wellness .
Studies reveal diets rich in flavonoids could lessen your risk of conditions like type 2 diabetes, colon cancer, and heart disease .
4. Bone Health
Because parsley is rich in vitamin K, it’s an excellent choice for your bones! Vitamin K supports bone-building cells called osteoblasts and activates proteins that increase bone mineral density, which refers to the amount of minerals in your bones. Lower bone mineral density is linked to a heightened risk of fractures, particularly in older adults. Many people aren’t getting enough vitamin K in their diet  .
5. Eye Health
Parsley provides vitamin A along with three carotenoids that support vision and protect your eyes—beta carotene, lutein, and zeaxanthin. Carotenoid pigments are present in plants and have impressive antioxidant activity. Eating foods that are excellent sources of lutein and zeaxanthin could lower the risk of late age-related macular degeneration (AMD) by up to 26%, according to interesting research . Going keto, ditching the sugar, and bringing in healthy fats could also help prevent macular degeneration.
Best Ways to Include Parsley in Your Ketogenic Diet