VISTRA Quercetin Immu-C Plus

Name: VISTRA Quercetin Immu-C Plus
Brand: VISTRA
Availability: InStock

Thai FDA Reg. No. 13-1-00449-5-0240 ↗Dietary supplement — not a medicine

WHAT IT IS

VISTRA Quercetin Immu-C Plus is a passion-fruit lozenge that combines 125 mg of QuerceClean™ quercetin from Spain with 500 mg of vitamin C, 3 mg of zinc and 240 IU of vitamin D in a two-tablet serving.

ABOUT THIS FORMULA

The label declares, per 1 tablet: sodium ascorbate 156.230 mg and ascorbic acid 138.900 mg (each providing 125 mg of vitamin C), quercetin 78.000 mg (providing 62.5 mg of quercetin), zinc citrate dihydrate 5.323 mg (providing 1.5 mg of zinc) and vitamin D3 1.320 mg (providing 120 IU of vitamin D). Passion-fruit flavoured lozenge; the quercetin raw material is imported from Spain (QuerceClean™). The label directs 2 tablets a day.

WHO IT’S FOR

·You want steady, everyday support for your body’s natural defences

WHERE TO BUY

Shopee Lazada

Every link goes to an official VISTRA store. Not sure which formula fits?Consult on LINE →

Key ingredients

QcQuercetin →CVitamin C →ZnZinc →

Related categories

Immunity

Product information

Form: Lozenge
Serving size: 2 tablets (2000 mg)
Directions: 2 tablets daily
Net weight: 30 g (30 tablets)
Other ingredients (additives): Anticaking agents (INS 470(iii), INS 551), sugar-substitute sweeteners (isomalt, sucralose), nature-identical flavouring
Allergen information: This product carries no allergen declaration
Ingredient origin: Ingredient imported from Spain
Trademark notices: QuerceClean™ is a Trademark of HealthTech Bio Actives, S.L.U.
Storage: Store in a cool, dry place below 30°C, away from light and moisture. Once opened, consume continuously until finished.
Warnings: Children and pregnant women should not consume. No effect in preventing or treating disease. Eat a variety of foods from the 5 food groups in appropriate proportions regularly. Not a food for weight control.
Barcode (EAN-13): 8 851515 608975
FDA reg. no. (อย.): 13-1-00449-5-0240
Halal certification no.: This product does not carry halal certification
Manufacturer / head office: Pronova Laboratories Co., Ltd., 88 Moo 7, Bueng Thong Lang, Lam Luk Ka, Pathum Thani 12150. Customer relations 02-791-3933

General product information based on the product label. This is a dietary supplement, not a medicine, and has no effect in preventing or treating disease.

Key ingredients

IngredientAmount per serving

Vitamin C500 mg (500%) [sodium ascorbate 156.230 mg + ascorbic acid 138.900 mg per tablet]

Quercetin125 mg [quercetin 78.000 mg per tablet, providing 62.5 mg quercetin]

Zinc3 mg (25%) [zinc citrate dihydrate 5.323 mg per tablet]

Vitamin D240 IU (40%) [vitamin D3 1.320 mg per tablet]

Total carbohydrate2 g (1%)

Sodium35 mg (2%)

Frequently asked about VISTRA Quercetin Immu-C Plus

How many tablets are in one serving of Quercetin Immu-C Plus?

One serving is 2 tablets, 2,000 mg in total, which differs from most VISTRA products where a serving is 1 tablet or 1 capsule. This matters when comparing products, because the amounts in a nutrition panel are per serving rather than per tablet, and a 30-tablet pack is therefore not 30 servings.

What is quercetin?

Quercetin is a plant compound in the flavonoid group. It is abundant in onions, apples, kale, grapes, tea and capers. In plants it is usually attached to natural sugars, whereas supplements normally supply quercetin on its own.

Why is quercetin often formulated with vitamin C?

It is a common formulation. What matters in practice is that the label states clearly which ingredient and how much of it the product provides, and that you follow the directions on the label.

When should I take quercetin?

It is normally taken with a meal at the amount stated on the label. Quercetin does not dissolve easily in water, so some formulations add fat or use technology that improves solubility. The body takes up only a small part of it, so the figure on the label does not indicate how much reaches the bloodstream.

Is this product Thai FDA-registered?

Yes — every VISTRA product is a dietary supplement registered with the Thai FDA. The registration number appears on the label and on this page.

Can it prevent or treat disease?

No. This is a dietary supplement, not a medicine — it has no effect in preventing or treating any disease. Read the label before use.

Last reviewed 9 Sep 2026 · Reviewed by VISTRA Editorial Team

VISTRA Quercetin Immu-C Plus

WHERE TO BUY

Shopee Lazada

VISTRA Quercetin Immu-C PlusWhere to buy ↑