Why High-Dose Vitamin C is a Game-Changer for Winter Immunity and more.....
- sara6297
- Sep 24
- 4 min read
Updated: Oct 2

We all know vitamin C is good for us — it’s the one everyone reaches for when a cold hits. But here’s the thing: those little orange supermarket tablets? They’re often so weak they barely touch the sides.
Your immune system needs far more than the token 80mg you’ll find in a “one-a-day” to actually fight off bugs, repair tissues, and keep inflammation under control. And this is where the real story of vitamin C gets interesting…
Why Humans Don’t Make Vitamin C
Most animals can make their own vitamin C. Goats, for example, can produce up to 13 grams a day when stressed or fighting infection — that’s thousands of times more than what’s in your typical supplement. Dogs, cats, and many other animals do the same.
But humans, along with monkeys and guinea pigs, lost this ability due to a genetic mutation millions of years ago. That means we’re completely dependent on food and supplements — and yet, our need for vitamin C hasn’t gone away.
How Vitamin C Supports Your Immune System
Fuel for your white blood cells – Vitamin C helps immune cells respond quickly and effectively to invading bugs.
Anti-inflammatory – It calms down unnecessary inflammation, which is what makes you feel so rough when you’re ill.
Antioxidant power – It mops up free radicals generated by infection and stress.
Collagen support – From your skin to your gut lining, vitamin C keeps your tissues strong and resilient, which is another barrier against illness.
Added benefits..... How Vitamin C Helps the Upper Gut
Research shows that taking around 5 grams of vitamin C daily doesn’t just strengthen the immune system — it also acts as a natural antimicrobial in the small intestine.
This part of the gut should really be a clean corridor, with little to no microbial activity. Your microbiome belongs much lower down in the large intestine, where it ferments fibre in a healthy way. But thanks to the carb- and sugar-heavy modern Western diet, many people now have unwanted fermentation happening higher up in the gut. This overgrowth of bacteria and yeasts is an overlooked root cause of countless health issues.
By clearing out those microbes, vitamin C helps restore the upper gut to its proper state. The result? Better digestion, reduced inflammation, improved nutrient absorption, and steadier energy and mood.
So while most people only think of vitamin C as something for colds, it’s actually doing far more behind the scenes — addressing one of the hidden triggers of fatigue, inflammation, and chronic illness.
Why High Doses Matter
When you’re stressed, fighting a bug, or even just run down, your body burns through vitamin C rapidly. A small tablet here and there won’t cut it — your immune system needs a bucket-load more fuel to do its job properly.
That’s why high-dose vitamin C works. Instead of “topping up,” it floods the system with enough support for your immune cells to actually get ahead of the infection.
How to Take It
Aim for 5 grams of vitamin C powder dissolved in water, sipped gradually throughout the day.
Increase when poorly: If you’re fighting off a bug, you may need to take even more — up to bowel tolerance (if stools become loose, ease back slightly).
Divide your dose: Your body absorbs vitamin C better when it’s spread across the day, which is why sipping works so well.
Food sources count too: Load up on peppers, kiwi, berries, citrus, parsley, and rosehip tea to add a natural boost.
Why Supplement Quality Matters
Not all supplements are created equal. Supermarket versions are often low dose and may not have been tested to ensure what’s on the label is actually in the bottle.
That’s why I always recommend high-quality brands that undergo third-party testing. This means an independent lab has checked that the product contains what it claims, in the right amounts, and is free from contaminants.
And a quick note on excipients: these are simply the inactive ingredients that help hold a capsule together or make a powder flow properly. In good-quality brands, excipients are safe and minimal — nothing to worry about. The focus should always be on dose, purity, and testing standards.
The Bottom Line
Vitamin C is safe, affordable, and one of the most powerful tools you can use to protect yourself through the winter months. Don’t rely on a token “one-a-day” from the chemist — it’s simply not enough. Give your immune system the levels it really needs, with supplements you can trust, and you’ll be far better placed to beat the sniffles before they begin.
I’ve chosen my favourite high-quality Vitamin C supplements that ticks all the boxes (potent, tested, reliable). You can check it out here:
Code: BIE-BE016 for Pure Vitamin C Powder 500g
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For a free discovery call click the link below.....