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.
Most plants contain chlorophyll (a green pigment) and by eating an excessive amount of greens you may get a green stool. In most cases itâs only temporary and nothing to be worried about. Eating a lot of greens may be healthy but you need to have a balanced diet. Consuming a lot of iron.