pce-pro.com

Close-up of black corn cob on the stalk.

PCE-PRO™ | Purple Corn Extract

Sourced from a purpose-bred, officially registered Korean corn variety, PCE-PRO™ delivers clinically studied support for prostate health and eye health, with a complete nonclinical safety program behind it.

PCE-PRO™ is Sunbio Corporation's flagship ingredient—a standardized purple corn extract delivering clinically validated benefits for both prostate health and eye health. With the highest anthocyanin density of any domestic botanical, PCE-PRO represents a new generation of evidence-based nutraceutical ingredients.

PCE-PRO is derived from the husks and cobs of Zea mays L.—a non-GMO purple corn variety locally bred and cultivated in Korea's Gangwon Province. Its deep purple pigmentation reflects an exceptional concentration of cyanidin-3-O-glucoside (C3G), the primary anthocyanin responsible for its biological activity.

Manufactured at a KGMP-certified, US FDA-registered facility, PCE-PRO is standardized to a guaranteed minimum of ≥12 mg/g C3G (cyanidin-3-O-glucoside)—the primary active anthocyanin responsible for PCE-PRO's biological activity—alongside ≥13% total anthocyanins (w/w) per batch. Korean functional food approval for eye health was received in May 2026.

A Purpose-Bred Botanical

PCE-PRO comes from the husk and cob of a non-GMO purple corn variety (Zea mays L.) specifically bred for high anthocyanin content and officially registered as a new corn variety in Korea's Gangwon Province.

Standardized & Verified

Every batch is standardized to C3G (Cyanidin-3-O-glucoside) ≥12 mg/g—the primary bioactive anthocyanin and PCE-PRO's key active marker—alongside a guaranteed minimum of ≥13% total anthocyanins (w/w). These two markers verify potency and consistency batch to batch.

Manufacturing

Produced at a KGMP-certified facility that is also registered with the US FDA. Korean functional food approval for eye health was granted in May 2026.

Safety

PCE-PRO is supported by a full nonclinical safety program conducted under GLP conditions per OECD test guidelines:

Bacterial reverse mutation (Ames) test
In vitro chromosomal aberration test
In vivo micronucleus test
Acute oral toxicity study
Dose-escalating oral toxicity study
90-day repeated-dose oral toxicity study

All genotoxicity studies were negative, and no adverse findings were observed in the toxicity studies at the doses tested. Full study reports are available upon request—Contact Us

Published Research

Kim et al., Journal of Agricultural and Food Chemistry, 2022 — purple corn extract and BPH
Frontiers in Pharmacology, 2025 — BPH, testosterone-propionate model
Nutrients, 2023 — purple corn extract and dry eye

These statements have not been evaluated by the Food and Drug Administration. This product is not intended to diagnose, treat, cure, or prevent any disease.

The Products

Prostate health

PCE-PRO is clinically studied for prostate health. In a randomized, placebo-controlled 12-week trial (500 mg/day), PCE-PRO showed statistically significant improvement over placebo in:

Post-void residual urine (bladder emptying)
Serum testosterone (maintained, vs. placebo decline)
Erectile function (IIEF question 8)

Broader urinary symptom scores (IPSS), quality of life, and overactive bladder measures improved numerically in the PCE-PRO group but did not reach statistical significance between groups in this trial. Notably, PCE-PRO maintained testosterone levels — unlike finasteride, which is associated with sexual side effects.

Preclinical research further shows PCE-PRO inhibits the conversion of testosterone to DHT and reduces prostate inflammation through the NF-κB and Nrf2 pathways.

Prostate support

Eye health

PCE-PRO is clinically studied for dry eye relief. In a randomized, placebo-controlled 12-week trial (500 mg/day), PCE-PRO showed statistically significant improvement over placebo in:

Ocular Surface Disease Index (OSDI)
Tear break-up time (TBUT)
Corneal fluorescein staining

Preclinical research further supports PCE-PRO's role in eye strain (asthenopia) relief and protection against oxidative stress and age-related macular changes.

Eye Comfort

Antioxidant Defense

PCE-PRO is standardized to deliver a high concentration of anthocyanins — plant pigments studied for their antioxidant properties — with every batch verified to contain ≥13% total anthocyanins (w/w) and ≥12 mg/g C3G, the primary bioactive anthocyanin in purple corn.

Antioxidant Defense

Why PCE-PRO Stands Apart

Most eye health and prostate health ingredients target a single mechanism. PCE-PRO works across multiple pathways simultaneously—making it uniquely effective and differentiated in both categories.

C3G Density

PCE-PRO is standardized to ≥12 mg/g of C3G (cyanidin-3-O-glucoside), the primary active anthocyanin driving its clinical effects. Purple Corn Extracts from husks and cobs as a botanical category have been measured as high as 18,500 mg/kg total anthocyanins—reflecting the exceptional potential of this plant family, well above common sources such as bilberry (~365 mg/kg), elderberry (~300 mg/kg), and blueberry (~150 mg/kg).

Standardization

Every batch is optimized for cyanidin-3-O-glucoside (C3G)—the primary bioactive anthocyanin—ensuring consistent, verified therapeutic potency from batch to batch.

Superior Sourcing

PCE-PRO is extracted from the cob and husk of purple corn, which contain over 10 times more anthocyanins than the kernels used in standard corn-based products. This is not a commodity corn extract. It is a purpose-bred, registered proprietary variety cultivated specifically for maximum anthocyanin yield.

Dual Indication / One Ingredient

PCE-PRO is the only botanical ingredient with completed human clinical trial data supporting both prostate health and eye health indications — allowing formulators to address two large and growing markets with a single, well-characterized ingredient.

Supply Chain Ready

Manufactured at a KGMP-certified, US FDA-registered facility in South Korea. Standardized CoA per batch. Korean functional food approval received in May 2026. Available exclusively in the US through Sunbio Corporation.

PCE-PRO™

PROSTATE HEALTH & EYE HEALTH — CLINICALLY VALIDATED

PCE-PRO™ | Purple Corn Extract

The Science

A Purpose-Bred Botanical

Standardized & Verified

Manufacturing

Safety

Published Research

The Products

Prostate health

Eye health

Antioxidant Defense

Anthocyanin Contents / Cyanidin-3-O-glucoside

Why PCE-PRO Stands Apart

C3G Density

Standardization

Superior Sourcing

Dual Indication / One Ingredient

Supply Chain Ready

PCE-PRO™

PROSTATE HEALTH & EYE HEALTH — CLINICALLY VALIDATED

PCE-PRO™ | Purple Corn Extract

The Science

A Purpose-Bred Botanical

Standardized & Verified

Manufacturing

Safety

Published Research

The Products

Prostate health

Eye health

Antioxidant Defense

Anthocyanin Contents / Cyanidin-3-O-glucoside

Why PCE-PRO Stands Apart

C3G Density

Standardization

Superior Sourcing

Dual Indication / One Ingredient

Supply Chain Ready

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