Sligo is a great town for good old-fashioned shop-keeping, and Mary and Norah O'Donnell's excellent wholefood store is one of its best-loved institutions, having supported local producers and supplied the town with a great range of health foods, organic vegetables and homeopathic remedies for many years.
Also advice a-plenty, and plenty of goodies to tempt you too - including vegan ice cream in the freezer.