Quali-C is a registered trademark of DSM Nutritional Products, guaranteeing vitamin C produced at the Dalry plant in Scotland. While almost all the world’s vitamin C is made in China, Quali-C stands out for its complete European traceability, rigorous quality controls and purity above 99.5%, with no contaminants, heavy metals or solvent residues throughout the manufacturing process.

Dynveo chose Quali-C to offer the best vitamin C available, in keeping with its focus on the purest, best-documented raw materials. The 100 g powder format is extremely cost-effective and allows precise, personalised dosing that standard tablets or capsules can’t match.

Vitamin C is an essential cofactor for several enzymes involved in collagen synthesis, the body’s main structural protein. It supports the normal function of the immune system, protects cells from oxidative stress, aids the absorption of non-haem (plant-based) iron, supports normal energy metabolism and normal nervous system function.

As a major water-soluble antioxidant, vitamin C neutralises free radicals and can regenerate oxidised vitamin E, extending the action of that fat-soluble antioxidant. Since the body can’t make or store significant amounts of vitamin C, a regular daily intake is needed.

The recommended dose is 500 mg to 1 g a day (half to one scoop), dissolved in a glass of water or fruit juice; as vitamin C is acidic, taking it with a meal helps limit stomach irritation, and diluting it in a larger volume of water is recommended for sensitive stomachs. Being water-soluble, any excess is naturally eliminated through urine; some experts recommend splitting the dose (morning and midday) for more stable levels throughout the day. Do not exceed 2 g a day unless advised by a doctor.

Doses above 2 g a day can cause digestive upset (diarrhoea, bloating, abdominal cramps) in some sensitive people. People prone to oxalate kidney stones should consult a doctor before high-dose supplementation. Food supplements are not a substitute for a varied, balanced diet and a healthy lifestyle. Keep out of reach of young children. If you are on medical treatment, particularly anticoagulants or medicines containing iron or aluminium, consult a healthcare professional. Vitamin C increases iron absorption; this can be beneficial in case of deficiency but should be taken into account in haemochromatosis. Store the tub tightly closed in a cool, dry place, away from light.

What is the ideal daily dose of vitamin C?

The recommended nutrient intake in France is 110 mg a day for an adult, though many nutrition experts consider doses of 500 mg to 1 g a day beneficial, particularly during periods of stress, tiredness or infection exposure. The Quali-C powder format lets you fine-tune the dose from 200 mg to 1 g or more, according to your situation and your healthcare professional’s advice.

Does vitamin C keep you awake?

Contrary to popular belief, vitamin C does not keep you awake — no scientific study has shown a stimulant effect on alertness or a negative effect on sleep. It can be taken at any time of day; people with a sensitive stomach may still prefer taking it with meals rather than at bedtime.

Can vitamin C be combined with other supplements?

Yes, vitamin C pairs well with many other supplements — it improves the absorption of plant-based iron, making it a great partner for iron supplements, extends the antioxidant action of vitamin E, and combines well with zinc, collagen (whose synthesis it supports) and bioflavonoids. Our team at Herba Barona in Paris 12 can advise on the best combinations for your situation.

Herba Barona is an independent specialist supplement shop in the heart of Paris — established in 2006. What you order is genuinely on our shelves: we ship from our own stock, with no dropshipping and no long waits.

Visit us at 10 rue Théophile Roussel, Paris 12 — or use Click & Collect and pick up your order in-store. We also deliver across France and Europe. Friendly, expert advice in English from our team.

Where is the shop?

Herba Barona is at 10 rue Théophile Roussel, 75012 Paris — a two-minute walk from Ledru-Rollin (line 8), close to Bastille. Open Tuesday to Saturday, 9:30 am–6:30 pm.

Can I order online or collect in store?

Yes. We ship across France and Europe under the same conditions as our French store, or choose Click & Collect to pick up your order for free at our Paris shop.