Pure Encapsulations

Ester-C & flavonoids

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The Promise

Concentrated vitamin C plus flavonoids — high-absorbability antioxidant blend

A vegetarian capsule delivering a calcium ascorbate–based vitamin C complex with complementary bioflavonoids.

Key ingredients

Each capsule supplies a calcium ascorbate blend providing 619 mg vitamin C (typical) plus 68 mg calcium, with 50 mg quercetin, 50 mg rutin and 50 mg pomegranate extract (standardized to 5% ellagic acid).

Formulation distinction

Vitamin C is provided as mineral ascorbates (including calcium ascorbate and associated calcium l‑threonate metabolite) intended for enhanced transport and uptake.

Delivery format

Vegetarian cellulose capsules with ascorbyl palmitate included as an additional form of vitamin C.

Quality and sourcing

Ascorbic acid is derived from corn fermentation; quercetin and rutin come from Sophora japonica and fava danta sources; pomegranate extract is standardized for ellagic acid.

Why It Works

Why these ingredients matter — targeted flavonoid support*

The combination of vitamin C with quercetin, rutin and pomegranate extract provides complementary antioxidant activity and vascular support.*

01

Calcium l‑threonate presence

Calcium l‑threonate, a metabolite of calcium ascorbate, may facilitate cellular transport and uptake of vitamin C.

02

Quercetin specifics

Quercetin in this formula is derived from Sophora japonica flower buds and helps support normal histamine release and balanced leukotriene and prostaglandin metabolism.*

03

Rutin and vascular integrity

Rutin is included to provide support for blood vessel integrity and healthy cell function.*

04

Standardized pomegranate extract

Pomegranate (Punica granatum L.) extract is standardized to 5% ellagic acid to ensure consistent tannin/ellagic acid content.

Reviews

Customer Reviews

Your Journey

How to use it — simple capsule routine

Follow the recommended capsule range and listed precautions.

Serving

Take 1–2 capsules daily

Suggested use is 1–2 capsules per day, taken with or between meals.

Timing & preparation

When to take it

Take capsules with or between meals as part of your daily routine.

Format & dietary fit

Vegetarian capsule

Capsules are vegetable cellulose, suitable for vegetarian use.

Precautions & interactions

Consultation and interactions

Consult a physician before use if pregnant or lactating, or with G6PD deficiency, iron overload, history of kidney stones, or kidney failure. Quercetin may interact with calcium channel blockers, estradiol, and immunosuppressive drugs; consult a healthcare professional if using these medications.

Product education

Suggested Use: 1-2 capsules per day, with or between meals.

Ester-C & flavonoids – Ester-C & flavonoids & flavonoids provides highly absorbable vitamin C and varied flavonoid compounds for synergistic antioxidant, immune and vascular integrity support.

Uses For Ester-C & flavonoids Antioxidant Support:*

Animal studies show increased plasma vitamin C concentration and delayed urinary excretion with administration of Ester-C & flavonoids, suggesting that it is readily absorbed and efficiently utilized. Calcium l-threonate, a metabolite of calcium ascorbate, may facilitate the transport and uptake of vitamin C, playing a key role in optimizing cellular levels. A human study involving 12 subjects indicated favorable bioavailability as well as revealing a boost in white blood cell levels. The bioflavonoids quercetin, rutin and pomegranate extract are powerful free radical scavengers that complement the roles of vitamin C. Quercetin helps maintain healthy histamine release and moderates healthy leukotriene and prostaglandin metabolism. Rutin and pomegranate extract provide important support for blood vessel integrity and healthy cell function.*

What Is The Source?

Ester-C & flavonoids mineral ascorbates are manufactured from ascorbic acid, mineral oxides and mineral carbonates. The mineral oxides and carbonates are mined domestically. The ascorbic acid is derived from corn fermentation. Quercetin and rutin are derived from Japanese pagoda tree (Sophora Japonica) flower buds and the fava danta tree respectively. Pomegranate (punica granatum l.) extract is standardized to contain 5% ellagic acid. Vitamin C (ascorbyl palmitate) is derived from corn dextrose fermentation and palm oil.

Are There Any Potential Side Effects Or Precautions?

If pregnant or lactating, consult your physician before taking this product. People with the following conditions should consult their doctor before supplementing with vitamin C: glucose-6-phosphate dehydrogenase deficiency, iron overload (hemosiderosis or hemochromatosis), history of kidney stones, or kidney failure. It has been suggested that people who form calcium oxalate kidney stones should avoid vitamin C supplements because vitamin C can convert into oxalate and increase urinary oxalate. In rare cases, quercetin may cause headaches and mild tingling of the extremities. Consult your physician for more information.

Are There Any Potential Drug Interactions? Quercetin may react with calcium channel blockers, estradiol, and immune suppressive drugs.

Supplement record

Review serving details and ingredients for this product.

Supplement Facts:
Suggested Use: 1-2 capsules per day, with or between meals.
each vegetable capsule contains:
Ingredients AMT %DV
calcium ascorbate blend (from from ChelaMax®) - -
providing (typical): vitamin C (from calcium ascorbate) 619 mg. -
calcium (from calcium ascorbate) 68 mg. -
quercetin 50 mg. -
rutin 50 mg. -
pomegranate (punica granatum L.) extract (whole fruit) 50 mg. -
(standardized to contain 5% ellagic acid) 2.5 mg. -
Other Ingredients: -  vegetarian capsule (cellulose, water), ascorbyl palmitate
(-) There is no %DV or the manufacturer has not provided this data.