The oil-based Fultium Daily D3 supplement can play a role in ensuring “healthy cell growth and repair”, as well as “healthy immune function”, Thornton & Ross added.

Vitamin D is produced in the body when the skin is exposed to sunlight, so patients have less of it during the darker winter months, it continued. As vitamin D receptors are “found in virtually every cell in the human body”, taking Fultium Daily D3 can “assist in all-round health”, the manufacturer said.

The capsule form of the product is halal and kosher certified, while the drops are suitable for vegetarians, and all meet Public Health England guidelines, Thornton & Ross said.

A pack of Fultium D3 retails at:

• £3.99 for 30 capsules
• £7.49 for 60 capsules
• £10.99 for 90 capsules
• £7.99 for a 15ml bottle.

For more information, visit the Fultium Daily D3 website. To order contact 01484 848200