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immune system, immunity, defense, vitamin C, D, zinc, glucan
Optim Immunity

Immune System

Natural Defenses

Food supplement based on vitamins C & D,
zinc, selenium and yeast beta-glucans

immunity, defense, immunité, immuniteit Immunity - Natural Defenses


Vitamins C & D, zinc and selenium contribute to the normal functioning of the immune system.

Yeast beta-glucans (Saccharomyces cerevisiae) help strengthen the natural defenses.

An innovative, natural and effective formulation to support your natural defenses.

A complex of vitamins C and D, zinc and selenium to support the immune system

Optim Immunity contains natural and vegetable vitamins. Vitamin C comes from an organic acerola juice extract.  Vitamin D3 is also natural and of plant-based origin. It comes from algae.

The minerals are highly bioavailable to guarantee better efficiency.  Zinc comes in the form of zinc gluconate. Selenium is obtained from selenium-enriched yeast, which guarantees excellent absorption.

Two capsules of Optim Immunity provide 100% of the recommended daily doses of vitamin C, zinc and selenium; and 250% of the recommended doses of vitamin D.

Yeast beta-glucans: natural compounds to optimise the immune system

Beta-glucans are nutrients (polysaccharides) that form the cell wall of yeast. Several clinical studies show that yeast beta-glucans (Saccharomyces cerevisiae) help strengthen natural defenses.

In fact, beta-glucans activate the immune cells known as macrophages. Macrophages act as waste collectors to phagocytize or engulf foreign particles such as bacteria or cell debris. They “trigger” a whole cascade of immune functions, strengthening the immune system. (Zheng, 2016)

Optim Immunity‘s yeast extract, Yestimun®, contains at least 85% (1,3)-(1,6)-D-beta-glucans. Yestimun® is produced in Germany where only malt, hops, yeast (100% Saccharomyces cerevisiae) and water are used in the fermentation of brewer’s yeast. Clinical studies demonstrate the efficacy of Yestimun® in adults from 250mg/day, the equivalent of two capsules per day of Optim Immunity.

optim immunity

What does Optim Immunity contain? Where do our ingredients come from?

supplement, immune system, optim, immunity, defence, organic, natural, glucans, yestimun

How can you boost your immune system?

The immune system is the body’s natural defense mechanism to fight viruses, bacteria and other pathogenic micro-organisms.

It consists of a complex network of organs, tissues and cells that can effectively distinguish between pathogenic and harmless substances. It is found throughout the body but is particularly concentrated in the mucous membranes of the respiratory system and in the intestinal mucous membrane.


What are the 10 tips for strengthening the immune system? What can I do to boost my natural defenses? 

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Optim Immunity

Frequently Asked Questions

Who can take Optim Immunity?

Optim Immunity is recommended for adults but also for teenagers.

Are there any contraindications?

No side effects are known with yeast beta-glucans at the recommended dosages.

Yeast beta-glucans can be consumed daily in doses up to 1275mg for people over 12 years of age and 675mg for children under 12 years of age (Commission Implementing Decision (EU) 2017/2078; Auinger 2013 ).

Can I take a vitamin D supplement in addition to Optim Immunity?

If you are deficient in vitamin D or if you wish to increase your vitamin D intake, you can take a vitamin D supplement such as Optim D3 in addition to Optim Immunity.

Taking 2 capsules of Optim Immunity provides 1000 IU of vitamin D3. The EFSA (European Food Safety Authority) recommends a maximum daily intake of 4000 IU of vitamin D.


Click here to see the references

Zheng X, Zou S, Xu H, Liu Q, Song J, Xu M, et al. The linear structure of β-glucan from baker’s yeast and its activation of macrophage-like RAW264.7 cells. Carbohydr Polym. (2016) 148:61–8.

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