Weight for weight, raw red chillies have about 144 mg of vitamin C per 100 g, close to three times the 53 mg in a lemon.
Many people think that the best source of vitamin C is provided by fruits such as lemons and oranges, but really there are a lot of foods that beat it. Red chilli peppers, for example, have about 143 mg of the good stuff per 100 g, compared to 53 mg in the same weight of lemon.
Why it matters for growers: Vitamin C drops when chillies are dried or cooked, so pods eaten fresh from the plant give you the most.
Source: USDA FoodData Central
