It’s easy to find dry goods at any of the minimarts or at LantaMart in Saladan. ┬áSome of the minimarts along the main road will sell fruits and vegetables, but for the freshest produce, I recommend a visit to one of the various markets located in various areas on Koh Lanta.

 
The markets are open every day, and their location changes, but I’ve managed to figure out where they are on most days:

Monday: Klong Dao – by the Reggae Bar
Tuesday:
Wednesday: Saladan Car Ferry
Thursday: Phra Ae – Right across from the school
Friday: Klong Nin, on the way to Old Town
Saturday: Saladan
Sunday:

If in doubt with regards to their exact location, look for a lot of traffic and motorbikes parked by the side of the road!