What are carbohydrates? Carbohydrates are organic molecules typically classified according to their structure. And, structurally speaking, there are two types of carbohydrates - simple and complex.Simple carbohydrates are smaller, more easily processed molecules and they’re named things like mono- and disaccharides since they contain either 1 sugar molecule or 2 sugar molecules linked together. Complex carbohydrates, on the other hand, are called polysaccharides since they have more than 1 sugar
