Vitamin C Powder

Name: Vitamin C Powder
Brand: Thorne
SKU: product-0321
Price: 25.00 GBP
Availability: InStock
Rating: 4.9 (31 reviews)

£25.00

Thorne Vitamin C Powder is a pure ascorbic acid supplement in powdered form, designed for flexible, daily vitamin C intake.

Pure ascorbic acid for daily immune and antioxidant support
Flexible dosing to suit individual needs and tolerance
Supports collagen synthesis and connective tissue health
May enhance non-haem iron absorption when taken together
Single-ingredient formula with no unnecessary additives

4.9 (31 reflections)

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ThorneVitamin C Powder

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about this product.

Thorne Vitamin C Powder is a pure ascorbic acid supplement in powdered form, designed for flexible, daily vitamin C intake. Ascorbic acid is the biologically active form of vitamin C, a water-soluble antioxidant that plays a central role in immune function, collagen synthesis, and the neutralisation of free radicals. It also supports the absorption of non-haem iron, making it a useful companion for those managing low ferritin levels.

The powder format suits people who prefer to avoid capsules, need to adjust their dose incrementally, or want to add vitamin C to a broader morning routine — mixing it into water, juice, or a smoothie takes seconds. It is a practical option for those recovering from illness, under sustained physical or psychological stress (both of which deplete circulating ascorbic acid), or simply seeking a reliable daily top-up when dietary intake is inconsistent.

Thorne is a brand with a long-standing reputation for rigorous manufacturing standards and minimal excipients. This product contains a single active ingredient — ascorbic acid — with no fillers, binders, or flavourings listed, which makes it straightforward to use and easy to stack with other supplements without introducing unnecessary additives. For those whose requirements are confirmed by a blood panel, the dose can be titrated precisely, which a fixed-capsule format does not allow.

frequently asked.

How does powder compare to a vitamin C capsule?

The active ingredient — ascorbic acid — is the same. The powder simply allows you to adjust your dose more precisely and avoids the binders or fillers sometimes present in capsule forms. It also dissolves easily into any drink.

Can high doses of vitamin C cause any side effects?

Ascorbic acid is generally well tolerated, but doses above bowel tolerance can cause loose stools or gastric discomfort. Starting with a modest amount and increasing gradually helps identify your personal threshold. Those with a history of kidney stones should consult a doctor before supplementing at higher doses.

Is this suitable to take alongside an iron supplement?

Vitamin C is commonly taken alongside non-haem iron because ascorbic acid is studied for its role in improving iron absorption. Taking both at the same time is a reasonable approach, but check with your doctor if you are on a prescribed iron therapy.

How long until I notice a difference?

For general immune and antioxidant support, consistent daily intake over several weeks is typically recommended. If you are supplementing to address a confirmed deficiency, a follow-up blood test after 8–12 weeks is the most reliable way to assess change.

Who might not be suitable for this product?

People with a history of kidney stones, haemochromatosis, or glucose-6-phosphate dehydrogenase (G6PD) deficiency should seek medical advice before taking high-dose vitamin C. Check the packaging for allergen information and consult your GP if you are pregnant, breastfeeding, or on medication.

Customer reflections

Overall sentiment

4.931 reflections

1 – 6 of 31 reflections

QQVerified Buyer

The first adrenal support that made a quick difference.

4 days ago

Gentle on a sensitive stomach, and I feel like myself again. I had tried two other glandulars before this and neither sat right.

MRVerified Buyer

Steadier mornings within a fortnight.

1 week ago

I was sceptical about glandulars, but my mid-afternoon crash has genuinely eased. One capsule with breakfast and I forget about it.

ALVerified Buyer

Subtle, but real.

2 weeks ago

Not a stimulant, which is exactly what I wanted. It took about ten days, then I realised I wasn’t dreading the afternoon any more.

SKVerified Buyer

My clinician recommended it.

3 weeks ago

Bought after a blood panel flagged a flat cortisol curve. Easy to take, no jitters, and the sourcing is refreshingly transparent.

TPVerified Buyer

Recovery feels faster.

1 month ago

Training hard through a stressful stretch and this has helped me bounce back between sessions. Already on my second bottle.

DVVerified Buyer

Does what it says.

1 month ago

No frills, one ingredient, a sensible dose. I appreciate that it is designed to be used for a season rather than forever.

Vitamin C Powder

about this product.

how to take it

frequently asked.

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