Nutritional supplements
Learning Center
Weight-loss surgery: Is it an option for you?
Weight-loss surgery is one part of a treatment plan for weight loss. Learn about the criteria and what is expected of you.
Weight loss: Better to cut calories or exercise more?
Understand how calorie restriction and exercise help you meet weight goals.
Water retention: Are there natural diuretics?
Interested in natural diuretics for fluid retention and weight gain? You may be better off watching your diet.
Warm-mist versus cool-mist humidifier: Which is better for a cold?
Warm-mist and cool-mist humidifiers are equally effective in humidifying the air.
Warfarin side effects: Watch for interactions
This common treatment for blood clots may cause concerning side effects. Know which medicines interact with warfarin and how to take the medicine safely.
Warfarin diet: What foods should I avoid?
Certain foods and drinks may affect how the blood thinner warfarin works. Know which foods and beverages are OK when you're taking the medicine.
Von Willebrand disease
Learn more about the symptoms, causes, diagnosis, treatment of this inherited bleeding disorder in which blood doesn't clot well.
Vitamin D toxicity: What if you get too much?
Understand the risks of too much vitamin D, including a toxic reaction.
Vitamin D deficiency
What are the risks of too little vitamin D?
Vitamin C: An essential nutrient
Vitamin C is a water-soluble vitamin that supports normal growth and development and helps your body absorb iron. Because your body doesn't produce or store vitamin C, it's important to include vitamin C in your diet. For most people, an orange or a cup of strawberries, chopped red pepper, or broccoli provides enough vitamin C for the day.
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