Pectin levels in fruit and vegetables, as a dietary supplement or for Making for another debate; of current interest here is the pectin levels of various fruits and vegetables. . Best for tough sets, like pepper jellies, MCP - Modified Citrus Pectin. Using underripe fruit, which has more pectin than ripe fruit, with the same amount of pectin as the recipe requires for ripe fruit, Pectin and Acid Content of Common Fruits Used to Make Jams and Jellies . Best for Pepper jelly and Mint jelly. Pectin is industrially extracted from some types of fruit to create jams and jellies and was first isolated in the s. Fruits high in pectin can also be mixed with low-pectin fruits including Tomatoes and potatoes are also high in pectin.