Collocations for cholesterol - noun

elevated (esp. AmE), high, raised
low
blood
raised blood cholesterol levels

bad, good

level
a high/low level of cholesterol

have (only used with high or low)
He has high cholesterol.

contain
Avocados contain no cholesterol.

lower, reduce
Eating garlic can significantly reduce cholesterol in the blood.

increase, raise
This is the fat that won't raise your cholesterol.

level
test
screening
drug, medication (esp. AmE), medicine

be high in cholesterol, be low in cholesterol
foods that are low in cholesterol