Diabetes Specialist

Duck Lim, MD -  - Internal Medicine

Valley Medical Center

Duck Lim, MD

Internal Medicine located in Granada Hills, CA

If you’re among the millions of men and women who have been diagnosed with diabetes, you may wonder whether an active, healthy life is still possible. Duck Lim, MD, a specialist in internal medicine with Valley Medical Center: Duck Lim, MD, in Granada Hills, California, helps people like you every day by offering treatment for diabetes that goes beyond basic prescriptions. If you’re managing your diabetes or worried you might have the condition, call or schedule a consultation online today and take a step toward empowering yourself about your overall health.

Diabetes Q & A

What is diabetes?

Diabetes mellitus is the name for a collection of diseases that influence the way your body processes blood sugar. Diabetes generates an unhealthy level of sugar, or glucose, in your blood,  which can cause significant and lasting health problems if left unmanaged.

The purpose of insulin in your bloodstream is to regulate your sugar levels, but people with diabetes don’t make enough insulin. Without insulin, the amount of glucose in your blood climbs to unhealthy levels.

Millions of people have diabetes. The most common form is type 2 diabetes. You can have type 2 diabetes at any age, but it's more common if you’re over age 40. Type 2 diabetes is typically caused by a mix of family history and environmental factors, though being overweight in your teens is considered a major risk factor for contracting diabetes.

Type 1 diabetes can also happen at any age, although it’s far more common to see it in children and teens. Like type 2, type 1 diabetes may have a genetic component.

What are the symptoms of diabetes?

You may hardly notice some of the symptoms of type 2 diabetes, or may confuse the symptoms with something else. Here are some of the signs and symptoms for both type 1 and type 2 diabetes:

  • Intense hunger or thirst
  • Frequent urination
  • Fatigue
  • Blurry eyesight
  • Unexplained weight loss
  • Irritability
  • Slow-healing sores
  • Recurring infections in the gums, vagina, or on the skin


Another warning sign is ketones in your urine. Ketones build up when your body doesn’t have enough insulin and starts breaking down fat and muscle.

How is diabetes diagnosed?

Dr. Lim runs certain tests to determine whether you have type 1 diabetes or type 2 diabetes. Most of these tests analyze the glucose levels in your blood. You may be asked to take one or more of these tests:

  • Fasting blood sugar test. You’ll be asked to fast overnight before providing a blood sample. A normal fasting blood sugar level less than 100 mg/dL, and blood sugar levels higher than that indicate prediabetes or diabetes.
  • Glycated hemoglobin (A1C) test. You’ll be asked to provide a blood sample to measure the share of blood sugar attached to hemoglobin — a protein in your red blood cells that carries oxygen. The higher your blood sugar, the more hemoglobin you'll have with sugar attached.
  • Oral glucose tolerance test. You’ll be asked to fast overnight and drink a sugary liquid. Then, Dr. Lim tests your blood sugar levels over a two-hour period. A blood sugar level above 200 mg/dL after two hours suggests you have diabetes.

How is diabetes treated?

Your treatment will depend on your type of diabetes. Effective treatment can include monitoring your blood sugar and taking insulin or oral medications.

If you have diabetes, you’ll also want to take care of your overall health and fitness. This includes getting regular exercise, sticking to a diet of healthy foods, and shedding any weight that might worsen your diabetes.

If you’d like to learn about the diagnosis and treatment options for your diabetes, call or schedule a consultation online today with Dr. Lim. His friendly staff caters to people who speak Korean and Spanish.