- With Mayo Clinic nutritionist
Katherine Zeratsky, R.D., L.D.read biographyclose window
Katherine Zeratsky, R.D., L.D.Katherine Zeratsky, R.D., L.D.
As a specialty editor for the nutrition and healthy eating guide, Katherine Zeratsky helps you sort through the facts and figures, the fads and the hype to learn more about nutrition and diet.
A Marinette, Wis., native, Katherine is certified in dietetics by the state of Minnesota and the American Dietetic Association. She has been with Mayo Clinic since 1999.
She is active in nutrition-related curriculum and course development in wellness nutrition at Mayo Clinic in Rochester, Minn., and nutrition education related to weight management and practical applications of nutrition-related lifestyle changes.
Other areas of interest include food and nutrition for all life stages, active lifestyles and the culinary arts.
She graduated from the University of Wisconsin-Madison, served a dietetic internship at the University of Iowa Hospitals and Clinics, and worked as a registered dietitian and health risk counselor at ThedaCare of Appleton, Wis., before joining the Mayo Clinic staff.
Nutrition basics (31)
- Water softeners: How much sodium do they add?
- Fat grams: How to track your dietary fat
- Yerba mate: Is it safe to drink?
- see all in Nutrition basics
Healthy diets (10)
- Canola oil: Does it contain toxins?
- Butter vs. margarine: Which is better for my heart?
- Detox diets: Do they work?
- see all in Healthy diets
Healthy cooking (7)
- When the heat is on, which oil should you use?
- Moldy cheese: Is it OK to eat?
- Food poisoning: How long can you safely keep leftovers?
- see all in Healthy cooking
Healthy menus and shopping strategies (8)
- What is BPA? Should I be worried about it?
- Brominated vegetable oil: Why is BVO in my drink?
- Sea salt vs. table salt: What's the difference?
- see all in Healthy menus and shopping strategies
Nutritional supplements (18)
- Ground flaxseed: Better than whole?
- Fiber supplements: Safe to take every day?
- Chocolate: Does it impair calcium absorption?
- see all in Nutritional supplements
Alkaline water: Better than plain water?
Is alkaline water better for you than plain water?
from Katherine Zeratsky, R.D., L.D.
For most people, plain water is best.
Because alkaline water has a higher pH level than does plain tap water, proponents say that it can neutralize acid in your bloodstream, boost your metabolism and help your body absorb nutrients more effectively. Some even say that alkaline water can help prevent disease and slow the aging process. However, researchers haven't verified these claims.
Some studies suggests that alkaline water may help slow bone loss, but further investigation is needed to determine if this influences overall bone mineral density and if the benefit is maintained over the long term.Next question
Healthy chocolate: Dream or reality?
- Heil DP. Acid-base balance and hydration status following consumption of mineral-based alkaline bottled water. Journal of the International Society of Sports Nutrition. 2010;7:29.
- Wynn E, et al. Alkaline mineral water lowers bone resorption even in calcium sufficiency: Alkaline mineral water and bone metabolism. Bone. 2009;44:120.
- Burckhardt P, et al. The effect of the alkali load of mineral water on bone metabolism: Interventional studies. Journal of Nutrition. 2008;138:435S.
- Cunningham E. What impact does pH have on food and nutrition? Journal of the American Dietetic Association. 2009;109:1816.