Hi, welcome to healthcare magic
The LDL goals for each person varies according to their calculated level of risk.
To determine how high a person's risk is we need to determine whether they have any disease or condition caused by blockage of blood vessels by cholesterol
such as peripheral artery disease
(poor circulation), coronary heart disease
( angina- chest pain
, palpitations, shortness of breath
on exertion ), symptoms of carotid artery disease
(blood vessel in the neck) or abdominal aneurysm
(dilation of the aorta which is a large blood vessel in the body).
You stated that you had no known medical problems.
After this , you look at the number of risk factors a present.
To calculate the number of risk factors, doctors look at the following : age ( a man older than 45yrs or a woman older than 55yrs)
level of HDL- if it is high( greater than 60) it is a negative factor because it has a protective effect
family history of premature heart disease- male younger than 55 or a female relative younger than 65, hypertension- blood pressure greater than 140/90 or on medication
Your risk factors would be your age. I am unsure about the family history . You stated that you had no illnesses so that would indicate no known hypertension.
That would be one risk factor.
If there is only one risk factor then your cholesterol should be less than 160 , so 133 is ok , though you should remember, the lower the better.
If there are 2 or more risk factors then your doctor will have look at some special tables to determine your 10 yr risk of having a cardiac event which would determine at what level you would need to start treatment but the goal would be less than 130.
I hope this information is helpful to you, you should speak to your doctor about any further queries you have