How does the nutritional profile of green bell peppers typically compare to their yellow/orange or red counterparts?
Lower in carotenoids, slightly more bitter flavor
Green bell peppers are fundamentally unripe versions of the sweeter, more mature colors (yellow, orange, or red). Due to their unripened state, they exhibit key differences in their nutritional composition. Specifically, green peppers are characterized as having lower overall levels of carotenoids, including beta-carotene, compared to their ripened counterparts. Furthermore, they possess a slightly more bitter or grassy flavor profile, which contrasts with the intense sweetness developed as the pepper matures on the vine. Although green peppers still offer benefits, such as Vitamin C and fiber, they do not deliver the maximum antioxidant punch related to carotenoids found in the red varieties.

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Bell Peppers 101-Nutrition Facts & Health Benefits - YouTube