The second period, Mesolithic 2, is also called the Natufian culture. The change from Mesolithic 1 to Natufian culture can be dated more closely. The latest date from a Mesolithic 1 site in the Levant is 12,150 BCE. The earliest date from a Natufian site is 11,140 BCE.
Food. Milk, yogurt, and cheese are rich natural sources of calcium and are the major food contributors of this nutrient to people in the United States [ 1 ]. Nondairy sources include vegetables, such as Chinese cabbage, kale, and broccoli.Spinach provides calcium, but its bioavailability is poor.ood. Milk, yogurt, and cheese are rich natural sources of calcium and are the major food contributors of this nutrient to people in the United States [ 1 ]. Nondairy sources include vegetables, such as Chinese cabbage, kale, and broccoli.
Other food sources are more absorbable like bone broth, dark leafy greens, fish with bones, and even carrots. Some foods like spinach, which is often suggested as a good dietary source of calcium, are only 5% absorbable, which make them great for other nutrients but not a good source of calcium. Bottom line: We need about 300-400 milligrams of absorbed calcium per day from food sources and not much more than that.