I am on a limited income and use Green Max Powder from Swanson Vitamins http://www.swansonvitamins.com . A three to four week supply is about twelve dollars. I first used Barleans Greens which was very good, but quite expensive. Dr. Schulze 's superfood is supposed to be excellent, but it is outside my budget. All Day Energy Greens by the Insitute for Vibrant Living is another good brand, I received some as a gift and really liked them. http://www.instituteforvibrantliving.com
Green foods are excellent for getting a wide variety of minerals and antioxidants from a variety of sources. Green Max Powder has both land and sea veggies and it helped me raise my morning pH from 5.0 to 6.8-7.2 in just a matter of days. I take that as a good sign that it contains the minerals my body was needing.
In whole foods, one of the very best sources of calcium is broccoli. You can eat it raw or for the best way to get the minerals, gently steam it and lightly drizzle it with sesame oil and sprinkle with Sea Salt . Cantaloupe is an excellent source of calcium and makes a wonderful dessert. I never buy melons in the winter by the way, most of them are from South America and were picked so green I doubt the minerals are very plentiful. Arkansas produces wonderful cantaloupes, watermelons and tomatoes (just ask Trapper) so I can pig out in summer and actually lose weight while gorging on my favorite foods.