They're probably not poisonous, but may have red rot, a form of fungus. If they smell slightly of formaldehyde, it is red rot. If you harvested your own, the crop is a loss. If you purchased them from a farm market, dispose of them (do not compost them) and perhaps let the vendor know. If you purchased them from a store, return them.
Eating them may not harm you, but will not likely taste very pleasant.
Red streaks inside of a potato is what is known as potato disease, of pink rot. This fungus forms from cool weather or damp conditions.
Erythematous simply means red, so an erythematous streaks are red streaks.
POTATOES. They wouldn't eat them because they thought they were poisonous.
Subtle erythematous streaks of the mucosa refer to small, faint red lines or streaks seen on the mucous membrane. These streaks may indicate minor irritation, inflammation, or increased blood flow in the area. It is important to monitor for any changes or symptoms associated with these streaks and consult a healthcare professional for further evaluation if needed.
There are so many different colour variations of Betta that red streaks in blue fins are quite common as are blue streaks in red fins. All it means is that the fish are cross bred.
Yes
They may be harder to see than regular streaks...but yes.
Potatoes
yes
Potatoes are most certainly not poisonous when they have eyes. The eyes just mean that they are able to reproduce. They are not harmful, but people tend to cut them out for visual beautification.
potatoes
Neither. Stick with your natural hair colour.