There is no proven way to prevent throat cancer from occurring. However, in order to reduce your risk of throat cancer, you can:
Stop smoking or do not start smoking: If you smoke, quit. If you do not smoke, do not start. Stopping smoking can be very difficult, so get some help. Your doctor can discuss the benefits and risks of the many stop-smoking strategies, such as medication, nicotine replacement products and counseling.
Drink alcohol only in moderation, if at all: If you choose to drink alcohol, do so in moderation. For healthy adults, that means up to one drink a day for women and up to two drinks a day for men.
Choose a healthy diet full of fruits and vegetables: The vitamins and antioxidants in fruits and vegetables may reduce your risk of throat cancer. Eat a variety of colorful fruits and vegetables.
Protect yourself from HPV: Some throat cancers are thought to be caused by the sexually transmitted infection human papillomavirus (HPV). You can reduce your risk of HPV by limiting your number of sexual partners and using a condom every time you have sex. Ask your doctor about the HPV vaccine, which may reduce the risk of throat cancer and other HPV-related cancers.
Courtesy: Mayo Clinic