Think leafy GREEN vegetables
asparagus, beet greens, green bell peppers, bok choy, broccoli, Brussels sprouts, green cabbage, celery, collard greens, cucumbers, green beans, green peas, kale, leeks, mustard greens, green olives, romaine lettuce, green sea vegetables, spinach, Swiss chard, and turnip greens
Found in most plants, wheatgrass, seaweeds, algae, and certain bacteria.