I Wasn't Catching More Colds. I Was Just Losing More Weeks To Them.
I found the race number still sealed in its envelope on the hall table in April. Entry had closed in November. Of the five months in between, I'd spent two of them sick — and I hadn't missed a single session for any other reason.
The pattern had been the same for three winters. Build for four weeks, feel strong, then lose eight to ten days to something that went round the office and barely touched anyone else. Come back flat. Start again.
I said it out loud to a training partner in a car park before a Tuesday session I'd turned up to on antibiotics. He didn't say "get more sleep." He said, "you know it's not random, right? It's always three or four days after your hardest week."
I went back through my log that night. He was right, and it had been right there in my own handwriting for three years.
Here's the part I had backwards, and it took a sports doctor to explain it plainly. Your first line of defence against a respiratory bug isn't in your bloodstream. It's a layer of antibodies sitting on the wet surfaces of your nose, mouth and throat — secretory IgA — and it's the thing a virus meets before anything else in your body even knows it arrived.
That layer isn't fixed. It dips after hard, prolonged efforts, and the dip lands in roughly the same window every time: the hours and days after your biggest sessions. Which is exactly where my log kept putting my sick weeks.
Why vitamin C, zinc, and "just sleep more" never moved the needle
- Vitamin C — supports the immune system you already have; it does nothing to the surface where the virus actually lands
- Zinc — studied for shortening a cold once it has started, not for stopping one from taking hold
- More sleep — genuinely helps, but the dip arrives in the hours after a hard session whether you slept nine hours or not
- Hand sanitiser and avoiding sick colleagues — that manages exposure, not susceptibility
- A daily multivitamin — that covers a deficiency, and I wasn't deficient
Your Immune System Has A Border. Training Thins It.
That single sentence explains every item on the list above. All of them support the army. None of them reinforce the border.
Which is where colostrum stops being a wellness-aisle curiosity and starts being interesting. Colostrum is the first milk produced after birth, and its entire job is handing a newborn a working set of defences before it can build its own. It is dense in immunoglobulins — the same class of antibody that does the work at those mucosal surfaces.
The outcome has been measured more than once. A systematic review of five randomised trials in adults in regular training found colostrum groups recorded about 44% fewer days with upper-respiratory symptoms and 38% fewer episodes across 8–12 weeks.1 A larger 2022 review across seven trials put the risk of infection at roughly two-thirds of placebo.2
Two honest caveats, because you should have them before you spend anything. The trials are small, and most were rated at moderate-to-high risk of bias by the reviewers themselves.1 And the mucosal explanation above is the leading interpretation of why it works — the fewer sick days were measured, the mechanism is inferred.
Introducing: Colostrum Capsules
Bovine colostrum in a daily capsule — the same ingredient used in those trials, aimed at the surface where infections start rather than at the system that fights them once they've arrived.
- Naturally rich in immunoglobulins, the antibody class that does its work at mucosal surfaces
- Supports the body's normal immune defenses through heavy training blocks
- Studied in adults in regular training, which is who it's actually for
- One capsule serving, third-party tested — no mixing, no taste, nothing to remember twice a day
Stop Losing February To A Cold Everyone Else Shook Off In Two Days
Check Availability →Who This Is For
The Pattern Is In Your Log. The Fix Isn't In The Vitamin Aisle.
Aimed at the surface where a cold actually starts — and taken daily through the block, not reached for once you're already ill.
Check Availability →Disclosure. This is an advertisement published by Modern Potion, which sells the product described above. It is not independent editorial or a news report.
These statements have not been evaluated by the Food and Drug Administration. This product is not intended to diagnose, treat, cure, or prevent any disease. Colostrum is dairy-derived — do not take it if you have a milk allergy. Consult your healthcare provider before starting any supplement, particularly if you are pregnant, nursing, immunocompromised, or taking medication.
1 Jones et al., systematic review and meta-analysis of randomised controlled trials, 2016 (5 trials, 152 participants; 4 of 5 rated moderate-to-high risk of bias). 2 Systematic review, meta-analysis and meta-regression of randomised controlled trials, 2022 (7 trials, 445 participants; risk ratio 0.64, 95% CI 0.498–0.822).
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