I like the image of the pill/orange combination that Vicks DayQuil Plus Vitamin C uses in this ad. The orange imparts the message that the product contains vitamin C.
There aren’t many ways to say vitamin C visually other than using an orange. But the orange implies that the product is going to taste like an orange. Since the product is a capsule, it doesn’t taste like anything. The orange also implies that there’s some natural fruit benefit to the product, which is why they ran a tiny disclaimer at the bottom of the page that no one can or will read:
Does not contain juice or fruit-based ingredients.