合ごう成せい甘かん味み料りょう

Meanings

1

noun

artificial sweetener; synthetic sweetener

Refers to chemically synthesized sugar substitutes, as opposed to natural sweeteners like sugar or honey.

flavor, taste

料fee, materials

天てん然ねん甘かん味み料りょう
天然甘味料 refers to natural sweeteners (e.g., stevia, honey), while 合成甘味料 is chemically synthesized.
砂さ糖とう
砂糖 is common sugar, a natural caloric sweetener, unlike the non-caloric or low-calorie 合成甘味料.

Compound of 合成 (synthesis) + 甘味料 (sweetener).