Symptoms — Verified Supplement Data

By Erin Rose · Updated June 25, 2026 · Methodology · About Us

• The 2pm Crash: Why You Hit a Wall Every Afternoon (2026)

  The afternoon crash isn\

• Always Tired? The Two Deficiencies Your Doctor Should Test For

  Persistent fatigue that won\

• Anxiety That Won\

  If anxiety persists despite lifestyle changes, certain supplements have clinical trial evidence. Magnesium glycinate reduced anxiety scores by 4.5 points (P<0.001) in an RCT. Here\

• Brain Fog: The Nutrient Deficiencies Behind Mental Cloudiness (2026)

  Brain fog — inability to think clearly, poor concentration, mental haze — is often caused by deficiencies in B12, iron, vitamin D, omega-3 DHA, or magnesium. Here\

• Can\

  If you can\

• Your Doctor Said Take Magnesium — Here\

  Doctor recommended magnesium but didn\

• Eye Twitching That Won\

  Persistent eye twitching (myokymia) is often caused by magnesium deficiency, stress, or poor sleep. Learn the evidence-based causes and what actually helps — including which supplements work.

• Feeling Depressed? Nutrient Deficiencies That Mimic or Worsen Depression (2026)

  Low mood, no motivation, and emotional flatness can be caused or worsened by deficiencies in vitamin D, folate, B12, omega-3, zinc, and magnesium. Testable. Fixable. Here\

• Hair Loss on Ozempic, Wegovy & Mounjaro: What Actually Helps (2026)

  25-33% of GLP-1 users experience hair thinning. It\

• Hair Falling Out? The Nutrient Deficiencies That Cause Hair Loss (2026)

  Hair loss in women is most commonly caused by iron deficiency (ferritin <30), vitamin D deficiency, or zinc deficiency — not genetics. Here\

• Heart Palpitations and Skipped Beats: When It\

  Heart palpitations, fluttering, and skipped beats are commonly caused by magnesium and potassium deficiency — not heart disease. A controlled study found 5 of 14 women on a low-magnesium diet developed arrhythmias.

• Heavy Periods and Iron Deficiency: The Cycle That Keeps Getting Worse (2026)

  Heavy menstrual bleeding depletes iron every month, causing fatigue, brain fog, and hair loss — which worsens with each cycle. Here\

• Leg Cramps at Night Every Night? Here\

  Nocturnal leg cramps keeping you awake? Evidence-based review of causes and treatments, including the one supplement with RCT evidence for reducing nighttime cramp frequency.

• Restless Legs at Night: The Iron and Magnesium Connection (2026)

  Restless leg syndrome (RLS) is strongly linked to iron deficiency — even when ferritin is "normal." Evidence shows ferritin below 75 mcg/L worsens RLS. Here\

• Tingling in Hands and Feet: The B12 Warning Sign You Shouldn\

  Tingling, numbness, or pins and needles in your hands and feet is the hallmark of B12 deficiency — and it can start at \

About our data

Every comparison uses clinical evidence from PubMed systematic reviews, product label data from the NIH Dietary Supplement Label Database, and third-party certifications (USP, NSF). Products are ranked by cost per clinically-effective dose. See our methodology and editorial standards.