<s>[INST] I don’t like milk and don’t want to supplement, but I am concerned about my bones, so I am eating a lot of greens, especially spinach and broccoli. Is this enough? [/INST] Green vegetables like spinach and broccoli are very good for you, but are not the best source of calcium. Those vegetables contain phytic and oxalic acids that bind with the calcium and make it less bioavailable. This means that the body is not able to absorb the calcium. Additionally, these high fiber vegetables move through the body quickly and reduce the ability of the body to extract the calcium. 

Calcium bioavailability varies from food to food. Foods that are high in oxalates like spinach, rhubarb, sweet potatoes, and dried beans are poorly absorbed. But there are still a number of good calcium sources outside of milk. Source: American Bone Health. Link: https://americanbonehealth.org/frequently-asked-questions/. Field: Rheumatology. Disease: Ostoeporosis </s>