It answers one narrow question
At the selected tickets,the400ml Simple bottle is£0.825 per100ml,the400ml Faith bottle£2.1225,and the60ml Nizoral medicine approximately£14.833333. These figures compare purchased volume only. They do not compare cleansing performance,treatment outcomes or suitability.
Do not manufacture a wash count
A cost-per-wash calculation would need a supported amount actually used for the exact product and context. This site does not assume a pump size,a hair-length amount or a fixed number of applications. A medicine course also requires its own current instructions and professional context.
A concrete buying decision
For two already suitable cosmetic candidates,a buyer can use volume rate alongside current ingredients and delivery conditions. If the actual question is whether a medicine is appropriate,the volume ranking cannot decide it. Keep cosmetic and medicinal purpose visible next to the arithmetic.
Unsupported bases stay unsupported
The tools refuse grams,active-ingredient totals and performance-per-pound conversions without the required evidence. A declared millilitre is not automatically a gram. Enter the actual selected price if checkout differs,and retain the current product reference rather than substituting a promotional or overseas pack.
A concrete decision record
The100ml denominator makes two different bottle sizes easier to read,but it does not make medicine and cosmetic outcomes comparable. Keep the product-purpose column visible in any exported notes. A unit rate should answer how much declared volume the money purchases,while ingredients,access and actual product suitability remain separate purchase questions.
Sources & scope
Checked November 5, 2026. Manufacturer and retailer references support the specific statements. Dated displayed prices are not final checkout quotes, performance rankings or performance testing. This shopping reference does not replace the exact product label or retailer instructions. Current received labels and independent clinical/chemical/content/commerce review remain pending.
Boots Simple400ml selected redirect10375990/8219443 ↗
Faith In Nature400ml one-time manufacturer record ↗
Boots Nizoral2%w/w60ml10025089/2695103 ↗