In this issue: Caffeine in drinks, smoking and Crohn's disease, pet allergy, meditation and more.

How much caffeine is in your favorite drink? Manage my newsletter.   HOUSECALL Vol. 15, Issue 66 | September 22, 2014   THIS WEEK'S TOP STORIES     Myelofibrosis Get the facts about this type of chronic leukemia. It's a bone marrow disorder that disrupts your body's normal production of blood cells.     Caffeine content for coffee, tea, soda and more   Are you bothered by headaches, restlessness or anxiety? Your daily caffeine fix may be the culprit. See how much caffeine is in your favorite drinks.           EXPERT ANSWERS   Does smoking have an effect on Crohn's disease? Smoking increases your risk of developing Crohn's disease. When you have Crohn's disease, smoking can trigger more flare-ups. Pet allergy: Are there hypoallergenic dog breeds? There are no hypoallergenic dog breeds, but you can reduce your allergic reactions.   PLUS ADDITIONAL HIGHLIGHTS ... Polycythemia vera Video: Need to relax? Take a break for meditation Essential thrombocythemia Treating GPA and MPA: What are the options?     TRUSTED HEALTH TOOLS   Use our Symptom Checker to explore possible causes of your symptoms based upon Mayo Clinic's patient care experience.   Use these simple calculators and self-assessments for personalized health tips.   Mayo Clinic healthy weight pyramid Calorie calculator     NOW BLOGGING   Nutrition-wise: Are there whole-grain options that are gluten-free? Avoiding gluten doesn't have to mean skipping out on all grains. Consider these five foods that are whole-grain and gluten-free.     MAYO CLINIC PRODUCTS & SERVICES   Try Mayo Clinic Health Letter today and get a free special report Don't miss this special offer. We'll send you a risk-free issue of Mayo Clinic Health Letter, America's favorite health newsletter, developed by Mayo Clinic doctors. As a bonus gift, we'll send you a free special report on arthritis. With this report, discover how you can reduce pain, overcome obstacles and lead an active life. Order now!     HEALTHY RECIPES   Pork tenderloin with apples and balsamic vinegar Savory buckwheat pilaf with toasted spices Glazed root vegetables Grapes and walnuts with lemon sour cream sauce   HEALTH TIP OF THE WEEK   Herbal supplements: Caution ahead If you take herbal supplements, include a dose of safety in your routine: 1. Don't exceed the recommended dosages. 2. Tell your doctor what you're taking. Some herbs may interfere with other drugs or have other harmful effects. 3. Avoid herbs if you're pregnant or breast-feeding, unless your doctor approves. 4. Be cautious about using herbal products manufactured in foreign countries.   Need practical advice on diet and exercise? Want creative solutions for stress and other lifestyle issues? Discover even more healthy lifestyle topics at MayoClinic.org.   Mayo Clinic is a not-for-profit organization. Proceeds from website advertising help support our mission. Mayo Clinic does not endorse any non-Mayo products and services. Advertising & Sponsorship Policy    |    Opportunities     Create hope and healing Create hope and healing with a gift to Mayo Clinic. Mayo Clinic is a nonprofit organization, and every dollar of your gift goes to funding the lifesaving research, outstanding patient care and critical medical education our patients and their families will be counting on this year. Please consider making a gift today.     Connect with Mayo Clinic For more of our reliable health information and tools, visit us at MayoClinic.org. Or add us to your social network!   Like us on Facebook Follow on Twitter Follow on Pinterest   Watch on YouTube Patient Stories View More Newsletters       Thanks for joining our mailing list, dr.samah.saied.ahmed@gmail.com, for Mayo Clinic HOUSECALL.   REMOVE me from this list | Add me to this list | Customer service   © 2014 Mayo Foundation for Medical Education and Research, 200 First Street SW, Rochester, MN 55905. All rights reserved.