1. I'm not happy about this. 2. I'm sorry, but this is unacceptable. 3. I'm not very satisfied with... [ex. this product / this situation] 4. (informal) I can't stand it when... [ex. the internet is slow] 5. (informal) This sucks.
Kumquat contains a high amount of antioxidants like Vitamin A, Vitamin C and Vitamin E. Along with these antioxidants, it contains a good amount of phytonutrients flavonoids like carotene, tannin, zeaxanthin, pectin, etc. Antioxidants and phytonutrients protect the body from oxygen free radicals. Free radicals are produced due to oxidative stress. These free radicals damage DNA of the cell and turns the normal cell into a cancer cell. But antioxidants neutralize these free radicals and acts as a shield to protect DNA from free radicals. Thus it is effective to protect from cancer.