Vitamins & Supplements Center
- Abortion
- ACE inhibitor-associated cough
- Acetaminophen poisoning
- Acne
- Acrodermatitis enteropathica
- Actinic keratoses
- Acupuncture anesthesia
- Acute bronchitis
- Acute lymphoblastic leukemia
- Acute myocardial infarction (MI)
- Acute promyelocytic leukemia
- Acute respiratory distress syndrome (ARDS)
- Acute rotaviral diarrhea
- Addison's disease
- Adjustment disorder with anxious mood
- Adrenal insufficiency
- Adrenoleukodystrophy (ALD)
- Adrenomyeloneuropathy
- Age-related cognitive impairment
- Age-related fatigue
- Age-related macular degeneration (AMD)
- Age-related maculopathy
- Age-related memory impairment
- Age-related muscle loss
- Age-related testosterone deficiency
- Aging
- Aging skin
- Agitation
- AIDS diarrhea-wasting syndrome
- AIDS-related cryptosporidiosis
- AIDS-related diarrhea
- AIDS-related lactic acidosis
- AIDS-related myelopathy
- AIDS-related opportunistic infections
- AIDS-related wasting
- Albuminuria
- Alcoholic hepatitis
- Alcoholism
- Alcohol-related liver disease
- Allergic rhinitis (hayfever)
- Allergies
- Alopecia
- Alopecia areata
- Altitude sickness
- Aluminum phosphide poisoning
- Alveolar osteitis
- Alzheimer's disease
- Amanita mushroom poisoning
- Amblyopia
- Amenorrhea
- Aminoglycoside-induced nephrotoxicity
- Amphotericin B-induced nephrotoxicity
- Amyloidosis
- Amyotrophic lateral sclerosis (ALS, Lou Gehrig's disease)
- Anal fissures
- Anal pruritus
- Androgenic alopecia
- Anemia
- Anemia of chronic disease
- Angelman syndrome
- Angina
- Angina pectoris
- Angioplasty
- Anorexia
- Anorexia nervosa
- Anterior uveitis
- Anthracycline-induced cardiotoxicity
- Antibiotic-associated diarrhea
- Antidepressant-induced sexual dysfunction
- Antiphospholipid syndrome-associated miscarriage
- Antipsychotic-induced metabolic side effects
- Antiretroviral toxic neuropathy
- Antiretroviral-induced diarrhea
- Antiretroviral-induced insulin resistance
- Antiretroviral-induced nausea and vomiting
- Anxiety
- Aplastic anemia
- Ariboflavinosis
- Aromatase inhibitor-induced arthralgias
- Arrhythmia
- Arsenic poisoning
- Arthralgias
- Arthritis
- Arthroscopic surgery
- Aspirin-associated gastric damage
- Asthenopia (eye strain)
- Asthma
- Ataxia associated with vitamin E deficiency (AVED)
- Atelectasis
- Atherosclerosis
- Atherosclerosis and peripheral arterial disease
- Athletic performance
- Atopic dermatitis (eczema)
- Atopic disease
- Atrial fibrillation
- Atrichia pubis
- Atrophic acne scars
- Attention
- Attention deficit-hyperactivity disorder (ADHD)
- Atypical depression
- Autism
- Autism or pervasive developmental disorder
- Autoimmune thyroiditis