Strengthen Immunity

Immune support supplements with vitamin D3, zinc and selenium, in tablets and sugar-free gummies.

About our immune support supplements

Vitamin D contributes to the normal function of the immune system, and the NHS advises everyone in the UK to consider a daily vitamin D supplement during autumn and winter. Choose the Vitamin D3 & K2 tablets (4,000IU D3 with K2 MK-7, 90-day supply) or the vegan, sugar-free D3 & K2 Gummies.

Zinc and selenium also contribute to the normal function of the immune system. Our Biotin, Zinc & Selenium tablets provide 10mg zinc and 55µg selenium, and the Women's Multivitamin covers a broad range of vitamins and minerals in one tablet.

Frequently asked questions

How much vitamin D do I need?

The NHS recommends 10 micrograms (400IU) a day for most adults. 4,000IU (100µg) is the maximum daily amount for adults, so don't take more than one high-strength vitamin D product a day.

Why is K2 added to vitamin D3?

Vitamin D and vitamin K both contribute to the maintenance of normal bones, which is why they are often paired.

Tablets or gummies?

Tablets are a long-lasting 90-day supply. Gummies are vegan, sugar-free and easy to take if you dislike swallowing tablets.

Onyx Nutra Sleep Night Time Gummies jar with valerian root and magnesium

These are non-addictive, tasty and they 120% work. I can sleep without them if I want, and I have noticed they even help straighten out my overall sleep schedule. But when I take 2 before bed… 30 minutes later I can’t keep my eyes open. Guaranteed deep sleep every time 😴🌙✨

Jane · 21 February 2026

Best marine collagen I've used. Mixes well in coffee with a quick stir. Unflavoured really means unflavoured, no fishy aftertaste at all. 9.2g protein per scoop is the macro detail I needed.

Liam · 25 April 2026

85.6% fulvic acid is the strongest I've seen verified. Manuka honey makes the taste manageable, otherwise pure resin can be intense. Sublingual under the tongue is the way. Energy throughout the day is steadier.

James · 17 March 2026

Best liquid collagen on the market. The HA, biotin and vitamin C doses are the highest I've come across. Two friends now take this on my recommendation. That's how confident I am in it.

Adetoun · 10 April 2026