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  1. Mad Cow Disease and Variant Creutzfeldt-Jakob Disease
  2. Maggie: Making Room for Worth-It Foods
  3. Maggie Morris: Plan Ahead When You Eat Out
  4. Maggie's Story: Making Changes for Her Health
  5. Maggie's Strategies for Eating Healthy
  6. Magnesium (Mg) Test - Medical Test
  7. Magnetic Field Therapy
  8. Magnetic Resonance Angiogram (MRA) - Medical Test
  9. Magnetic Resonance Cholangiogram - Medical Test
  10. Magnetic Resonance Imaging (MRI) - Medical Test
  11. Magnetic Resonance Imaging (MRI) of the Abdomen - Medical Test
  12. Magnetic Resonance Imaging (MRI) of the Breast - Medical Test
  13. Magnetic Resonance Imaging (MRI) of the Head - Medical Test
  14. Magnetic Resonance Imaging (MRI) of the Knee - Medical Test
  15. Magnetic Resonance Imaging (MRI) of the Shoulder - Medical Test
  16. Magnetic Resonance Imaging (MRI) of the Spine - Medical Test
  17. Maintaining a Healthy Relationship With a Loved One Who Has a Mental Health Condition
  18. Major Nutrients in Food
  19. Make the Most of Your Doctor Visit (video)
  20. Making a Birth Plan
  21. Making a Change That Matters
  22. Making a Plan to Cut Back on Alcohol Use
  23. Making a Plan to Help Someone Get Treatment for Alcohol Use Disorder
  24. Making a Suicide Safety Plan
  25. Making It Easier to Wear a Mask During COVID-19
  26. Making Meals With Less Sodium (video)
  27. Making Positive Changes in Your Life After Quitting Smoking
  28. Making the Most of Your Appointment
  29. Making Wise Health Decisions
  30. Making Your Change Happen
  31. Malabsorption Syndrome
  32. Malaria
  33. Male Breast Cancer Treatment (PDQ®): Treatment - Health Professional Information [NCI]
  34. Male Breast Cancer Treatment (PDQ®): Treatment - Patient Information [NCI]
  35. Male Condoms
  36. Male Genital Problems and Injuries
  37. Malignant Mesothelioma Treatment (Adult) (PDQ®): Treatment - Health Professional Information [NCI]
  38. Malignant Mesothelioma Treatment (Adult) (PDQ®): Treatment - Patient Information [NCI]
  39. Malocclusion and Orthodontics
  40. Mammogram - Medical Test
  41. Mammogram: What to Expect (video)
  42. Manage Stress for Your Heart
  43. Managing a Croup Attack (video)
  44. Managing Emotional Changes During Pregnancy
  45. Managing Job Stress
  46. Managing Morning Sickness (video)
  47. Managing Pain While You're in the Hospital (video)
  48. Managing Relationship Stress for Couples
  49. Managing Relationship Stress for Families
  50. Managing Seasonal Allergies (video)
  51. Managing Your Emotional Reactions
  52. Managing Your Medical Bills
  53. Managing Your Medicines (video)
  54. Managing Your Toddler's Frustrating Behaviors
  55. Manual Therapy for Neck Pain
  56. Marijuana
  57. Marine Stings and Scrapes
  58. Marine Toxins
  59. Martha's Story: A Voice for Recovery
  60. Marvin's Story: Coping After the Hurricane
  61. Massage Therapy
  62. Massage Therapy During Pregnancy
  63. Mastectomy (video)
  64. Mastectomy (Removal of the Breast) for Breast Cancer
  65. Mastectomy: Returning Home (video)
  66. Master List of Medicines
  67. Mastitis While Breastfeeding
  68. Maze Procedure
  1. Meal Planning
  2. Measles (Rubeola)
  3. Measuring the Intensity of Your Activity (video)
  4. Measuring Your Waist
  5. Media and Your Child: Making Choices
  6. Medial Collateral Ligament (MCL) Injury
  7. Mediastinoscopy - Medical Test
  8. Medical and Nonmedical Options for Gender Affirmation
  9. Medical Checkups for Adolescents
  10. Medical History and Physical Exam for Dementia or Alzheimer's Disease
  11. Medical Marijuana
  12. Medical Specialists
  13. Medical Tests: Questions to Ask the Doctor
  14. Medicare Hospice Benefit
  15. Medicare: What You Need to Know
  16. Medicinal Mushrooms (PDQ®): Integrative, alternative, and complementary therapies - Health Professional Information [NCI]
  17. Medicinal Mushrooms (PDQ®): Integrative, alternative, and complementary therapies - Patient Information [NCI]
  18. Medicine Blood Level Test - Medical Test
  19. Medicine for High Blood Pressure (video)
  20. Medicine or Other Drug Use and Sleep Problems
  21. Medicines and Mouth Problems
  22. Medicines and Other Substances That Can Cause Symptoms of Depression
  23. Medicines and Sun Exposure
  24. Medicines and Urinary Symptoms
  25. Medicines During Pregnancy
  26. Medicines for ADHD (Attention Deficit Hyperactivity Disorder)
  27. Medicines for Bone Loss
  28. Medicines for Cluster Headaches
  29. Medicines for Depression (video)
  30. Medicines or Vitamins That Can Cause Gas, Bloating, or Burping
  31. Medicines That Can Cause Abdominal Pain
  32. Medicines That Can Cause Acute Kidney Injury
  33. Medicines That Can Cause Blisters
  34. Medicines That Can Cause Bruises
  35. Medicines That Can Cause Changes in Heart Rate or Rhythm
  36. Medicines That Can Cause Changes in Menstrual Bleeding
  37. Medicines That Can Cause Confusion or a Decreased Alertness
  38. Medicines That Can Cause Constipation
  39. Medicines That Can Cause Diarrhea
  40. Medicines That Can Cause Headache
  41. Medicines That Can Cause Heartburn
  42. Medicines That Can Cause Nausea and Vomiting
  43. Medicines That Can Cause Pancreatitis
  44. Medicines That Can Cause Tinnitus
  45. Medicines That Can Cause Weakness or Fatigue
  46. Medicines That Cause Hearing Loss
  47. Medicines That Increase the Chance for a Heat-Related Illness
  48. Medicines That May Cause a Rash
  49. Medicines That May Cause Arm or Leg Problems
  50. Medicines That May Cause Lightheadedness or Vertigo
  51. Medicines That May Cause Rashes in Children
  52. Medicines That May Cause Vaginal Symptoms
  53. Medicines to Prevent Abnormal Heart Rhythm in Heart Failure
  54. Meditation
  55. Mediterranean Diet
  56. Melanoma Excision Surgery
  57. Melanoma Treatment (PDQ®): Treatment - Health Professional Information [NCI]
  58. Melanoma Treatment (PDQ®): Treatment - Patient Information [NCI]
  59. Melatonin
  60. Memory Problems: Issues With Driving
  61. Memory Problems: Tips for Helping the Person With Daily Tasks
  62. Memory Problems: Wandering
  63. Menarche
  64. Ménière's Disease
  65. Meningitis
  66. Meningococcal ACWY Vaccine: What You Need to Know
  67. Meningococcal B Vaccine: What You Need to Know
  68. Meniscectomy for a Meniscus Tear
  69. Meniscus Repair
  70. Meniscus Repair: Before Your Surgery (video)
  71. Meniscus Surgery: Recovery Time
  72. Meniscus Tear
  73. Meniscus Tear: Rehabilitation Exercises
  74. Meniscus Tear: Should I Have a Diagnostic Test (MRI or Arthroscopy)?
  75. Meniscus Tear: Should I Have Surgery?
  76. Menopause and Perimenopause
  77. Menopause and Your Risk for Other Health Concerns
  78. Menopause: Managing Hot Flashes
  79. Menopause: Should I Use Hormone Therapy (HT)?
  80. Men's Health
  81. Menstrual Cramps
  82. Menstrual Cramps: Relieving Pain
  83. Menstrual Cups
  84. Menstrual Diary to Monitor Premenstrual Symptoms
  85. Menstruation: Not Having a Period by Age 15
  86. Mental and Behavioral Health
  87. Mental Health Assessment - Medical Test
  88. Mental Health Problems and Stigma
  89. Merkel Cell Carcinoma Treatment (PDQ®): Treatment - Health Professional Information [NCI]
  90. Merkel Cell Carcinoma Treatment (PDQ®): Treatment - Patient Information [NCI]
  91. Metabolic Syndrome
  92. Metastatic Melanoma
  93. Metastatic Squamous Neck Cancer with Occult Primary Treatment (Adult) (PDQ®): Treatment - Patient Information [NCI]
  94. Metastatic Squamous Neck Cancer With Occult Primary Treatment (PDQ®): Treatment - Health Professional Information [NCI]
  95. Metformin and You: A Winning Strategy (video)
  96. Metformin for Diabetes
  97. Methamphetamine
  98. Methicillin-Resistant Staphylococcus Aureus (MRSA)
  1. Middle East Respiratory Syndrome (MERS)
  2. Migraine Headache Triggers
  3. Migraine Headaches
  4. Migraines: Finding and Avoiding Triggers
  5. Mild Cognitive Impairment and Dementia
  6. Mild, Moderate, and Severe Vertigo
  7. Mild, Moderate, or Severe Diarrhea
  8. Milestones for 10-Year-Olds
  9. Milestones for 2-Year-Olds
  10. Milestones for 3-Year-Olds
  11. Milestones for 4-Year-Olds
  12. Milestones for 5-Year-Olds
  13. Milestones for 6-Year-Olds
  14. Milestones for 7-Year-Olds
  15. Milestones for 8-Year-Olds
  16. Milestones for 9-Year-Olds
  17. Milestones for a 1-Year-Old
  18. Milestones for Ages 11 to 14
  19. Milestones for Ages 15 to 18
  20. Milestones for an 18-Month-Old Child
  21. Military Sexual Trauma
  22. Milk Oversupply
  23. Milk Thistle
  24. Milk Thistle (PDQ®): Integrative, alternative, and complementary therapies - Health Professional Information [NCI]
  25. Milk Thistle (PDQ®): Integrative, alternative, and complementary therapies - Patient Information [NCI]
  26. Mind-Body Wellness
  27. Mindfulness: Breathing Practice (video)
  28. Mindfulness Tips for Teens (video)
  29. Mindfulness: What Is It? (video)
  30. Mindfulness-Based Stress Reduction
  31. Minerals: Their Functions and Sources
  32. Miscarriage
  33. Miscarriage: Should I Have Treatment to Complete a Miscarriage?
  34. Misdiagnosis of Lyme Disease
  35. Missed or Irregular Periods
  36. Missed Periods and Endurance Training
  37. Mistletoe Extracts (PDQ®): Integrative, alternative, and complementary therapies - Health Professional Information [NCI]
  38. Mistletoe Extracts (PDQ®): Integrative, alternative, and complementary therapies - Patient Information [NCI]
  39. Mitochondrial Diseases
  40. Mitral Valve Prolapse
  41. Mitral Valve Regurgitation
  42. Mitral Valve Regurgitation: Repair or Replace the Valve?
  43. Mitral Valve Repair Surgery
  44. Mitral Valve Replacement Surgery
  45. Mitral Valve Stenosis
  46. Mitral Valve Stenosis: Repair or Replacement?