Journal of Agri-Food Science and Technology (JAFoST)
Vol. 7 No. 2 (2026): June

Optimization of Vitamin C and Antioxidant Activity in Jelly Candies through the Addition of Tomato Juice and Red Guava

Fitriyah Zulfa (Agricultural Product Technology Study Program, Vocation School, Universitas Sebelas Maret, Surakarta, Indonesia)
Alfi Nur Rochmah (Agricultural Product Technology Study Program, Vocation School, Universitas Sebelas Maret, Surakarta, Indonesia)
Yenny Febriana Ramadhan Abdi (Agricultural Product Technology Study Program, Vocation School, Universitas Sebelas Maret, Surakarta, Indonesia)
Dininurilmi Putri Suleman (Agricultural Product Technology Study Program, Vocation School, Universitas Sebelas Maret, Surakarta, Indonesia)
Dini Nadhilah (Agricultural Product Technology Study Program, Vocation School, Universitas Sebelas Maret, Surakarta, Indonesia)
Prajwalita Rukmakharisma Rizki (Agricultural Product Technology Study Program, Vocation School, Universitas Sebelas Maret, Surakarta, Indonesia)
Dea Yoana Putri (Agricultural Product Technology Study Program, Vocation School, Universitas Sebelas Maret, Surakarta, Indonesia)



Article Info

Publish Date
20 Jun 2026

Abstract

Adding functional foods to confectionery can increase children's nutritional intake. Gummy candy is a type of confectionery that children enjoy. It contains high sugar but low nutritional value. The innovation of adding fruit extracts rich in vitamin C and antioxidants from abundant local foods, such as tomatoes and red guava, was expected to improve the gummy candy's chemical properties. This research contributes to improving the chemical characteristics and sensory acceptability of gummy candy by adding tomato and red guava extract. The ingredients are tomato and red guava juice, gelatin, high-fructose syrup, sucrose, and citric acid. Treatments Formula F0, F1, F2, and F3 received 0, 10, 30, and 30% tomato juice and 0, 10, 20, and 30% red guava. The results of sensory testing showed that the panelists preferred the F3 gummy candy formulation. Chemical characteristics show that the addition of red guava extract increases the moisture content, vitamin C, antioxidants, and total soluble solids. In F0, the moisture content was 31.14%, vitamin C 0.21 mg, antioxidant activity 21.63%, and total soluble solids 30.17 mg/L. The optimal treatment at F3 produced a moisture content of 40.19%, total soluble solids of 35.83 oBrix, antioxidant activity of 34.56%, and vitamin C of 1.61 mg. Adding tomato and red guava juice to gummy sweets can increase their vitamin C and antioxidant content. Gummy candy is a nutritious food that tastes good and has enough vitamin C and antioxidants for people to consume.

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Journal Info

Abbrev

jafost

Publisher

Subject

Agriculture, Biological Sciences & Forestry Biochemistry, Genetics & Molecular Biology Chemistry

Description

Journal of Agri food Science and Technology is a peer review journal that the Food Technology Department officially publishes Faculty of Industrial Technology Universitas Ahmad Dahlan As a scientific journal JAFOST publishes research and scientific studies related to the development of chemical or ...