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This company even has kosher grape colors.
San Joaquin Valley Concentrates is the largest supplier of natural grape anthocyanin colors to the food and beverage industries. The company offers a wide range of intensities and shades in liquid and crystal form, made from blends of Rubired grape, purple carrot, and purple sweet potato. All of the company’s products, including their grape products, are OU kosher.
San Joaquin Valley Concentrates’ newest natural color is crystal purple sweet potato: a vibrant pink shade with superb color intensity. Its crystal form is not dusty and is easy to solubilize.
San Joaquin Valley Concentrates