Because vitamin c is found in the citrus fruits. for example - Lemon etc.

Key Nutrient in Citrus Fruits: Vitamin C
Citrus fruits are well-known for their high content of vitamin C, which is a vital nutrient for the human body. Here is why vitamin C is the key nutrient in citrus fruits:

Antioxidant Properties
- Vitamin C acts as an antioxidant, helping to protect cells from damage caused by free radicals.
- It also helps the body absorb iron from plant-based foods.

Immune System Support
- Vitamin C is essential for the proper functioning of the immune system.
- It helps in the production of white blood cells, which are crucial for fighting off infections.

Collagen Production
- Citrus fruits play a role in collagen synthesis, which is important for maintaining healthy skin, bones, and blood vessels.
- Collagen is a protein that provides structure to the body's tissues.

Other Nutrients in Citrus Fruits
- While vitamin C is the most abundant nutrient in citrus fruits, they also contain other essential nutrients such as fiber, potassium, and folate.
- These nutrients contribute to overall health and well-being.
In conclusion, the main nutrient found in citrus fruits is vitamin C, which plays a crucial role in various bodily functions. Including citrus fruits in your diet can help ensure you meet your daily vitamin C requirements and enjoy the many health benefits associated with this essential nutrient.