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Clear or very pale blue might mean insufficient copper binding or extremely dilute concentrations

This also includes the gastric mucosa, where oral supplementation with PC has been shown to provide gastrointestinal support to damaged cells.Phosphatidylcholine and lecithin are often used interchangeably to mean, purified phosphatidylcholine. This can be a misleading as lecithin extract is actually a complex mixture of phospholipids, glycolipids, and triglycerides, containing less than 20% total phosphatidylcholine composition

Plant Cell Environ 40(8):12811295

When the outermost layer of your skin becomes congested, light reflects unevenly, thus making it look tired