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Vitamin C supplementation is often an afterthought, yet many people — particularly those under sustained stress or eating a restricted diet — fall short of optimal intake. We chose Thorne's buffered version specifically because standard ascorbic acid causes genuine gastrointestinal issues for a meaningful number of people at therapeutic doses. The powder format removes the capsule-count guesswork and makes flexible, consistent dosing straightforward. Thorne's manufacturing rigour and minimal-ingredient approach align with what we expect from a practitioner-grade brand.
About this product
Buffered C Powder
Buffered C Powder by Thorne is a vitamin C supplement in powdered form, using a buffered version of ascorbic acid — meaning the acidity is partially neutralised, typically with mineral salts such as calcium, magnesium, or potassium ascorbate. This makes it considerably gentler on the gastrointestinal tract than standard ascorbic acid, which can cause discomfort at higher doses.
Vitamin C is one of the most studied micronutrients in human health. It contributes to normal immune function, collagen synthesis, and the protection of cells from oxidative stress. As a water-soluble vitamin, it is not stored in the body and must be obtained consistently through diet or supplementation.
The powder format suits people who find capsules difficult to swallow, those who want to titrate their intake with flexibility, or those who need higher doses — such as individuals recovering from illness, under significant physical stress, or with identified deficiency. It dissolves readily in water and can be added to any cold drink.
Thorne is a brand with a long-standing reputation in the practitioner supplement space, known for rigorous manufacturing standards and clean formulations. This product contains no unnecessary fillers, making it a straightforward choice for those who want vitamin C without additional ingredients. It is a particularly sensible option for anyone who has experienced digestive sensitivity with standard ascorbic acid in the past.
What it does
Benefits
- 01
Buffered formula is gentler on the digestive tract
- 02
Supports normal immune function year-round
- 03
Flexible dosing via measured powder format
- 04
Contributes to collagen synthesis and tissue repair
- 05
Suits those with ascorbic acid sensitivity
Get the most from it
How to use
Mix half a teaspoon into a glass of water or cold drink. Follow the dosage guidance on the packaging, as individual requirements vary. Taking it with food may further reduce any chance of digestive discomfort.
What's inside
Ingredients
View full ingredient list
Ascorbic Acid (buffered)
Common questions
Frequently asked
Why is buffered vitamin C easier on the stomach than regular ascorbic acid?
Standard ascorbic acid is quite acidic, which can irritate the stomach lining or cause loose stools at higher doses. Buffering it with mineral salts raises the pH, making it significantly gentler — a meaningful difference for anyone taking more than a modest daily amount.
How long until I notice a difference?
Vitamin C works as part of your ongoing nutritional status rather than producing an acute effect you would notice quickly. Consistent daily intake over several weeks is the relevant timeframe for supporting immune resilience and tissue health.
Is this suitable for people with sensitive stomachs?
It is specifically formulated with that in mind. The buffered form is the standard recommendation for anyone who has experienced nausea, heartburn, or loose stools with regular ascorbic acid supplements.
Can I take this alongside other supplements?
Vitamin C is generally well-tolerated alongside most common supplements and may actually enhance the absorption of non-haem iron. If you are on any prescribed medication, check with your GP or pharmacist before adding any new supplement.
Who might need more than the standard dietary reference intake of vitamin C?
Smokers, people under chronic stress, those recovering from illness or surgery, and individuals with limited fruit and vegetable intake are among those who may have higher requirements. A blood test can help clarify whether your levels are adequate.
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