1 In general, the total dissolved solids concentration is the sum of the cations (positively charged) and anions (negatively charged) ions in the water. 2  Parts per Million (ppm) is the weight-to-weight ratio of any ion to water.  A TDS meter is based on the electrical conductivity (EC) of water.
Collard greens may be worth considering for health additions to your diet. These dark-green leafy vegetables provide iron, vitamin K, folate, calcium and the antioxidants lutein and zeaxanthin. They may even help you prevent gout or reduce your symptoms when you eat collard greens in moderation as part of a healthy diet.
Raw, steamed or boiled collard greens are low in calories, but the calories will be higher if you cook your greens in fat, such as butter or oil. Other Nutrients. A potential benefit of collard greens for gout is their 5.3 grams of dietary fiber per cup, since dietary fiber lowers levels of cholesterol in your blood. High cholesterol is a risk factor for gout. You may also be at risk for gout when your blood pressure is high. Collard greens cooked without salt have only 30 milligrams of sodium per cup, and they provide 220 milligrams of potassium, which is necessary for regulating blood pressure.