FairDose

Value math

Cost Per Dose: The Number That Matters

Bottle price hides the truth. Cost-per-dose reveals it.

Short answer

Cost-per-dose is the monthly cost divided by the number of servings. It removes bottle-size and serving-size tricks and lets you compare two products in seconds.

Key comparison points

  1. 01Why bottle price is misleading
  2. 02How to calculate cost-per-dose
  3. 03Serving size traps
  4. 04Subscription pricing gotchas
  5. 05How much variation is normal
  6. 06A reasonable cost-per-dose for magnesium

Same dose, different value

Bottle priceServingsCost / dose
£1230£0.40
£1830£0.60
£3430£1.13

What FairDose compares

  • Cost-per-dose, not cost-per-bottle
  • Subscription vs one-off pricing
  • Servings per container

Stop reading. Start comparing.

Run a like-for-like magnesium glycinate comparison, or read the FairDose methodology.

Compare magnesium glycinateMethodology

Related magnesium guides

Form comparisonMagnesium glycinate vs citrate vs threonate: what's the difference?Value pickBest Value Magnesium Glycinate in the UKForm explainerMagnesium Glycinate vs Bisglycinate

Informational only — not medical advice. FairDose does not tell you to start, stop or switch supplements. Always check the label and speak to a qualified professional if unsure.