'may increase risk' is correct and usable in written English.
You can use it in a variety of contexts to express the possibility that something will lead to an increased risk. For example: "Smoking cigarettes may increase risk of developing certain types of cancer."
Head injuries may increase risk; high blood pressure is a new suspect.
This study supports the notion that consuming quantities of relatively high GI foods (such as white bread, pasta and potato) may increase risk of diabetes.
On the other hand, failing to treat the condition can also stress the heart, and some studies suggest it may increase risk of Alzheimer's disease and other dementias.
Poor dietary habits may increase risk for obesity and chronic diseases among Canadian adolescents.
Low GCS may increase risk but may also be due to lack of sedation wean pre-extubation.
To measure the incidence of disability in individuals aged 90 years and older and examine factors that may increase risk of disability.
Many of the traditional diets only include small amounts of red and processed and salt-cured meats, whose consumption may increase risk of colorectal and stomach cancers.
3. Having a hormone unbalance may increase risk.
Consuming three or more alcoholic drinks per day may increase risk for elevated triglycerides (fat in the bloodstream).
Alcohol intake (even in moderate amounts) also may increase risk of breast, colorectal and some other cancers and may contribute to falls and injuries.
While some "feminine" norms such as trying to be seen as nice and nurturing may have a protective effect against heavy drinking, others, like being especially concerned about appearance and looks, may increase risk.
