Are there any uses for dried lemon slices that have turned dark?
Blackened dried lemon slices are generally unusable.
Lemons contain abundant vitamins, trace elements, and other components. Sliced and dried lemons can be steeped in tea to provide nutrition, enhance immunity, clear heat, detoxify the body, stimulate saliva production, and relieve summer heat. However, if the slices turn black, this usually indicates spoilage, with significant loss of nutritional content. Consuming them may irritate the gastrointestinal tract, leading to diarrhea, bloating, or similar issues.
Dried lemon slices should normally be stored in a cool, well-ventilated place, avoiding prolonged exposure to air, which could cause oxidation or microbial contamination resulting in discoloration. Once blackened, they should no longer be used.