Activated charcoal is used to treat food poisoning and drug overdose. It is perfectly safe to eat since the vendors are required by the City Government of Davao (my hometown) to undergo a Food Safety and Sanitation Seminar. For us to be sure, we eat in the stall where we can see their certificate of participation in the seminar. Aside from that certificate, the surroundings is clean as they are also required to clean the place before they close their stalls. Everyday the Sanitary Inspector monitors the vicinity.
I enjoy eating street foods. It's affordable, palatable and safe. There are an array of street foods that I can choose from.