Agar is the product of several species of seaweed. It is also known as agar-agar. Different from gelatin in some ways, agar does not melt easily. Its texture is also more firm. Agar has a slightly sweet flavor and contains no calories, which is useful if you are looking for a low calorie food. It is used often for making desserts to replace gelatine in sweet and savoury dishes. Agar is a good source of calcium and iron, and is very high in fiber. It contains no sugar, no fat and no carbohydrates. It is known for its ability to aid in digestion and weight loss. It carries toxic waste out of the body.