Fruits whose flesh is red, and contain lots of water also has a high content of anti-oxidants and glutathione.
Glutathione can help strengthen the immune system so it can fight infections. Watermelon fruit is also useful to boost the immune system.
Watermelon fruit contains vitamin C which is very useful to boost the immune system.
Although the content is not as much as vitamin C in citrus fruits, but vitamin C in watermelon is enough to meet the needs of vitamin C in the human body, but also to protect the body from free radicals.
Watermelon contains a very high amount of anti-oxidants that can protect the body from free radical attack. Anti-oxidants contained by watermelon fruit is carotenoids.