Hard training blocks come with a well-known cost most people don't plan for: you get run down and catch every cold going around. That's not bad luck, it's a documented effect of high training load on immune function, and it's exactly what Wellmune® in BIG D is there to address.
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Why Heavy Training Affects Your Immune System
Intense, high-volume training is a genuine physical stressor. In the hours after a hard session, there's a well-documented temporary dip in immune function, sometimes called the "open window" effect, which is part of why athletes in heavy training blocks report getting sick more often than people training moderately. It's a real, measurable phenomenon, not just bad luck.
What Is Wellmune®?
Wellmune® is a patented beta glucan derived from baker's yeast (Saccharomyces cerevisiae), one of the most clinically studied immune-support ingredients on the market. Beast BIG D includes 250mg per serving. Wellmune® is a registered trademark of Kerry Group.
What the Evidence Shows
Beta glucans work by priming immune cells, particularly neutrophils and macrophages, to respond more effectively when they encounter a genuine threat, rather than acting as a broad stimulant. Research on Wellmune® specifically has focused on reducing upper respiratory tract infection symptoms and supporting immune readiness during periods of physical and psychological stress, exactly the kind of stress a heavy training block puts on the body.1
Dosage
250mg daily, as delivered in BIG D, is a standard studied dose for beta glucan immune support. Like the other saturation ingredients in BIG D, it's a daily-use ingredient rather than something you'd take reactively once you already feel unwell.
Common Myths
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"Immune supplements cure colds." No supplement treats an active infection. The evidence base for beta glucans is around supporting immune readiness and potentially reducing symptom frequency or severity, not curing illness once it's started.
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"You only need immune support when you're already run down." The research on Wellmune® is based on consistent daily use, taken proactively through a training block, not reactively after symptoms appear.
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"All beta glucans are the same." Source and processing matter. Wellmune® is a specific, patented, clinically studied form, not a generic catch-all term.
Wellmune® FAQs
Eddie's take: "Getting sick mid-training-block sets you back weeks, not days. Immune support isn't glamorous but it's part of staying consistent, and consistency is what actually builds strength."
Beast BIG D
BIG D - Daily Saturation Formula
30 Servings£34.99
Creatine. Evolved.
Beast BIG D is the daily saturation formula. 200 mesh creatine monohydrate plus five additional clinical-grade ingredients in one scoop. Same daily habit as plain creatine. Six times the formula.
Peak ATP® delivers ATP directly, not a precursor. Wellmune® protects immune health during hard training blocks. AstraGin® maximises absorption of everything else. Beta-Alanine extends endurance. Betaine Anhydrous supports power output.
The daily non-negotiable. Developed and approved by Eddie Hall, World's Strongest Man.
WARNING: BIG D will likely produce a temporary tingling sensation. That's Beta-Alanine paraesthesia, harmless, well-documented, and proof the formula is working. It fades with consistent use.
†Consuming at least 3g of creatine daily increases physical performance in successive bursts of short-term, high-intensity exercise.
Directions
Mix 1 scoop (13g) with 500ml to 750ml of water.
Consume 1 serving per day. Do not exceed recommended dosage.
Ingredients
Creatine Monohydrate, Beta Alanine, Betaine Anhydrous, Adenosine 5'-triphosphate (as Peak ATP®) Bakers Yeast Beta Glucan Saccharomyces cerevisiae (as Wellmune®), Astralagus membranaceus Extract (root) (as Astragin®) Flavouring, Citric Acid, Sweetener (Sucralose).
NET WT. 390g. No artificial colours.
Warnings
Please consult your physician prior to use (especially if you have a medical condition). Not recommended for anyone under the age of 18. Do not take this product if you are pregnant or breast feeding. If you are taking any medication consult your doctor before taking this product. Do not exceed the suggested use. Keep out of the reach of children. This product is not intended to diagnose, treat, cure, or prevent any disease or illness. Food supplements should not be used as a substitute for a varied, balanced diet and healthy lifestyle.
Allergens
Manufactured in a facility that processes celery/celeriac, crustaceans, fish, milk, mustard, peanuts, soya, gluten, egg, lupin, molluscs, nuts, sesame and sulphur dioxide.
Delivery
All UK orders are shipped using a 1-2 working day service.
Free Tracked 24 shipping is available on all orders over £25, for orders under £25 shipping is charged at £4.99
Orders placed before 1pm on weekdays are shipped the same day.
Orders placed at weekends and bank holidays will be processed on the next working day.
Europe - Please allow 5 - 10 business days for delivery. Orders under 150 EUR - including shipping costs - will not incur any customs or VAT charges.
Rest of the World - Please allow 7 - 14 business days for delivery.
DHL EXPRESS WORLDWIDE - 1 - 3 business days.
All orders are shipped tracked - a tracking link will be provided in your shipping confirmation email.
Additional Charges
Customers may incur VAT charges and Customs Duty specific to their country. The buyer assumes responsibility for any importation costs. If customs and duty fees imposed by your country are not paid, we cannot accept responsibility for the items. It is essential to familiarize yourself with your country's regulations regarding the importation of goods. If an item is confiscated due to regulations, we are not liable, and any resulting charges will be the customer's responsibility. For information regarding return shipping costs, please refer to our Refund Policy.
References
- Talbott, S. M., & Talbott, J. A. (2010). Effect of Beta 1, 3/1,6 Glucan on Upper Respiratory Tract Infection Symptoms and Mood State in Marathon Athletes. Journal of Sports Science and Medicine, 9(3), 509–514.
This article is for informational purposes and is not medical advice. Consult a healthcare professional before starting any new supplement, particularly if you have an existing health condition, are pregnant or breastfeeding, or are under 18.
