Jelly is a thickener (sodium alginate, agar, gelatin, carrageenan, etc.) by adding a variety of synthetic fragrances, coloring agents, sweeteners, sour agents from the preparation. Although from the algae and land plants, but in the process after extraction of acid, alkali, bleaching process and so on to the original vitamins, mineral nutrients, such as the loss of Yi are doing. Sodium alginate, agar, etc. belong to types of dietary fiber, but too much will affect the human intake of fat and protein absorption, especially iron, zinc and other salts are not soluble as a result of the mixture into to reduce the body of iron, zinc and other trace absorbing elements. Synthetic essence, the general multi-esters and aldehydes by the chemicals dissolved in the preparation of alcohol from. Pineapple flavor jelly, mainly by adding a small synthetic ester-based fragrance; apple jelly containing isoamyl; banana jelly contain acid such as amyl acetate. The bright color of jelly, is adding the result of artificial coloring agents. These artificial coloring agents, based on coal tar as the raw material by chemical synthesis, these substances on the human body there is no nutritional value, eat good, and even a certain degree of toxicity.
In recent years, a number of markets a wide range of jelly, an increase of milk, chocolate, as well as fruit jelly, fruit jelly in the layered pulp, crystal clear, very bright attractive, not only an increase of fancy, and a certain degree of nutritional value.