Are mint leaves edible?
Generally speaking, mint leaves can be eaten when the variety is suitable and they are clean and hygienic; however, they should not be consumed if the variety is unknown or if there is a possibility of contamination. Detailed analysis is as follows:

When mint leaves are of edible varieties, such as spearmint or lemon mint, and have been grown in a favorable environment without the use of harmful substances like pesticides or chemical fertilizers, and have been thoroughly washed after harvesting to remove surface contaminants such as dust and pathogens, these mint leaves can be safely consumed. Whether eaten raw to enjoy their cool and distinctive flavor, or used to prepare beverages and dishes, they can enhance taste and also aid digestion and freshen breath.
If the mint variety is uncertain, especially ornamental types, they may contain components harmful to human health. Additionally, if pesticides were used during growth or the leaves are contaminated with pollutants on the surface and have not been properly cleaned, they must not be consumed. Eating such mint leaves may introduce harmful substances into the body, causing gastrointestinal discomfort and potentially endangering health.
When consuming mint leaves, it is essential to carefully identify the variety, ensure a safe growing environment, and properly clean the leaves. If safety cannot be confirmed, do not attempt consumption lightly, to avoid health risks due to improper use.