The Presence of Toxins
This presence of chlorophyll is probably sounding fairly harmless to you. After all, you can purchase chlorophyll-based drinks and supplements. This pigment is supposed to be really good for your health, right? While the green color itself is harmless and, yes, chlorophyll is good for you, it can also signal the presence of a toxic plant compound called solanine. This toxin is produced in higher levels when potatoes are exposed to light, damaged, or stored improperly. The link between these two things is sunlight. Sunlight causes chlorophyll to be produced, but it also causes solanine. The handy part here is that you can see the chlorophyll, whereas you can’t see the solanine.