Compare every Vitamin D3 product across UK retailers on Suppio, ranked by true value - price per active dose, not pack size. Prices refreshed daily.
Cholecalciferol - supports calcium absorption, immunity, and mood
We rank Vitamin D3 by price per 5mcg - not by pack size - so a bigger tub with a worse price per dose can't outrank a smaller one that's actually cheaper.
What it is
Vitamin D3, also known as cholecalciferol, is a fat soluble vitamin. This means it dissolves in fats rather than water, allowing the body to store it for later use.
Why it's used
It is primarily used to help the body absorb calcium, which is essential for maintaining strong bones. It is also used to support the immune system and help regulate mood.
How it's made
To make this supplement, companies typically start with lanolin, which is a greasy substance secreted by the woolly fleece of sheep. This lanolin is processed and treated with ultraviolet light to convert it into the active form of the vitamin, which is then purified into a powder or liquid for capsules.
What it typically costs
The cost of Vitamin D3 is generally mid range. This is because the raw materials are relatively easy to source in large quantities, but the specific light treatment and purification processes required to ensure potency add to the production cost.
Dosage by purpose
Purpose
Typical studied dose
Evidence
bone health and prevention of osteoporosis
400 to 1000 IU per day
established
risk groups for vitamin D deficiency
2000 to 4000 IU per day
emerging
reduction of depressive symptoms, fatigue, and pain in a pediatric population
Suppio matches identical products across UK retailers by barcode, then ranks by price per active dose rather than sticker price. Value rankings only ever include listings Suppio has independently verified against the live retailer page - unverified data is shown on each product’s own page but excluded from ranking.
Prices across our retailer network are refreshed at least daily.
Cholecalciferol - supports calcium absorption, immunity, and mood
How does Suppio calculate the best-value Vitamin D3?
We rank Vitamin D3 by price per 5mcg - not by pack size - so a bigger tub with a worse price per dose can't outrank a smaller one that's actually cheaper.
Are these prices verified?
Suppio matches identical products across UK retailers by barcode, then ranks by price per active dose rather than sticker price. Value rankings only ever include listings Suppio has independently verified against the live retailer page - unverified data is shown on each product’s own page but excluded from ranking.
How often are Vitamin D3 prices updated?
Prices across our retailer network are refreshed at least daily.