Everything DoseRank tracks on the magnesium oxide shelf — Calcium Carbonate. The category itself is never ranked: 94 products get scored the moment you say what you want them to do.
How to read the scores
This legend covers the scores on this page — for data sources, scoring weights, and limits, read the full methodology →
Answer a few questions about your goals, habits, stack, and budget. Then, DoseRank will find the products that best match your needs based on your answers. It's free and only takes 60 seconds! No account is required.
A saved, shareable breakdown: your matched products, dose math, interaction flags to discuss with a clinician, and a price-tracked stack you can revisit.
Questions
Each product gets a composite score blending clinical strength, evidence, dose fit, trust and value — computed for the goal you picked, across this category's products. The #1 on the DoseRank tab has the highest composite; the other tabs re-rank the same products by Value, Trust, or Popularity. Placement is never paid.
Start with a goal, not a brand
Browsing magnesium oxide supplements without a goal makes no sense — different products do different jobs, and “best” flips depending on which job you're hiring for. These are the 45 health outcomes that matter for this category. Pick yours, and the full evidence-ranked shelf loads for that goal alone.
Gastroesophageal reflux or heartburnReflux symptoms causing burning or discomfort.82 rankedModerate-strong
Magnesium statusBiochemical sufficiency of magnesium.84 rankedStrong
TolerabilityOverall ability to continue the intervention without unacceptable side effects.23 rankedModerate-strong
ConstipationInfrequent, difficult, or hard bowel movements.87 rankedStrong
Migraine severityFrequency, duration, or intensity of migraine episodes.85 rankedStrong
Muscle crampsPainful involuntary muscle contractions.87 rankedModerate-strong
Blood pressureArterial pressure; direction of benefit depends on baseline status.90 rankedStrong
Sleep qualityOverall restfulness and perceived quality of sleep.44 rankedModerate-strong
Anxiety symptomsWorry, tension, fear, or related anxiety manifestations.30 rankedStrong
Insulin sensitivityEfficiency of tissue response to insulin.39 rankedStrong
Arrhythmia occurrenceAbnormal heart rhythm episodes.4 rankedLimited
Withdrawal symptomsSymptoms occurring after reduction or cessation of use.2 rankedLimited
Agitation or restlessnessUndesired activation, jitteriness, or inner restlessness.2 rankedModerate-strong
Calmness or relaxationReduced tension and greater sense of calm.3 rankedStrong
Angina symptomsChest discomfort due to reduced cardiac blood flow.1 rankedModerate-strongNothing is ranked yet — the shelf stays locked until you pick a goal.
No goal, no ranking.
A “best magnesium oxide supplement” list without a goal would be marketing, not evidence. Pick what you want to improve and DoseRank scores all 94 products against that goal's trials.