Compare every Vitamin D product across UK retailers on Suppio, ranked by true value - price per serving, not pack size. Prices refreshed daily.
What it is
Vitamin D is a fat soluble vitamin, meaning it is stored in the body's fat tissues and liver rather than being flushed out through water. Supplements usually come in two forms: Vitamin D2, which is plant based, and Vitamin D3, which is more similar to the version the body makes naturally.
Why it's used
It is primarily used to help the body absorb calcium, a mineral essential for keeping bones and teeth strong. Because the body produces it when skin is exposed to sunlight, people often take supplements during winter months or if they spend most of their time indoors.
How it compares to Vitamin C
While both are essential for a healthy immune system, they function very differently in the body.
Feature
Vitamin D
Vitamin C
Solubility
Fat soluble (stored in the body)
Water soluble (excess is excreted)
Primary Source
Sunlight and oily fish
Fruits and vegetables
Main Role
Bone health and calcium absorption
Collagen production and tissue repair
How it's made
To make these supplements, manufacturers start by extracting the vitamin from a raw source, such as lanolin (a wax found in sheep wool) for D3 or yeast for D2. This concentrated oil is then mixed with a carrier oil to keep it stable. Finally, the liquid is either put into a soft gel capsule or dried into a powder to be pressed into a tablet.
What it typically costs
This supplement is generally mid range in price. This is because while the basic raw materials are not overly expensive, the process of ensuring the vitamin remains stable and potent during storage requires specific manufacturing standards.
How Suppio ranks
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.
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 D prices updated?
Prices across our retailer network are refreshed at least daily.