The Science
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The Science
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.
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.
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.
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.
Anthocyanin Contents / Cyanidin-3-O-glucoside
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.
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These statements have not been evaluated by the Food and Drug Administration. These products are not intended to diagnose, treat, cure or prevent any disease. This information is furnished without warranty, representation, inducement or license of any kind. You are responsible for determining if these products are appropriate for your use.
Sunbio Corporation, Yorba Linda, California
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