Doctor's Best Epicor is a postbiotic immune support supplement that helps resilience and gut balance by providing a clinically studied yeast fermentate named EpiCor. Produced with non-GMO vegan capsules and strict quality controls, it's a brand you can rely on for reliable immune support daily.

Available Sizes & Variants:

60 vegetarian capsules - convenient daily immune support in a ready-to-go capsule.

Benefits & Features:

• One capsule daily supports immune resilience.
• Fueled by EpiCor fermentation, its key active ingredient works with the body's natural defenses for supporting mucosal immunity and gut balance, without any fillers added.
• Non-GMO and vegan friendly ingredients keep a clean label.
• Manufactured to strict food-grade standards in GMP facilities.
• Clinically studied dosing of 500mg daily mirrors human trials, helping you fit immune support into a busy routine without sacrificing efficacy or consistency daily.

Epicor is produced by Cargill in GMP-certified facilities using a proprietary yeast fermentation and drying process to create a robust postbiotic fermentate. The ingredient is non-GMO, gluten-free, kosher and vegan, with Doctor’s Best’s clean-label, transparent approach you can trust. In human studies, a daily 500mg dose has shown immune modulation and gut health benefits while remaining well tolerated. This postbiotic sits neatly into daily routines and can be paired with other wellness staples - some customers also use probiotics or a vitamin d supplement, or even berberine, for holistic health.

EpiCor dried yeast fermentate, EpiCor dried yeast fermentate

• GTIN: 753950001770
• Manufacturer: Doctor's Best
• Categories: Best SellersDoctor’s Best Supplements & VitaminsSubscribe & Save Products
• Best buy: 6 - 24 months+

United Kingdom Shipping:

Orders placed by 2pm (Monday to Friday) are dispatched the same day. Orders placed after 2pm will be dispatched the next working day.

Free shipping on orders over £50 to the UK.

Returns: Our products are meant to make you feel healthy and at your best. If you need to return your item, you can do so free of charge within 30 days in the same original and unopened packaging. Subject to T&C's.

Take 1 capsule daily, or as directed by your healthcare professional. Store in a cool, dry place. Keep out of reach of children. Consult your doctor before use if you are pregnant, nursing, diabetic, or have a chronic condition.

Please consult the product packaging for accurate instructions on how to use the product.

*Percent Daily Values are based on a 2,000 calorie diet. Your daily values may be higher or lower depending on your calorie needs.

The Active Ingredient Is: EpiCor (Saccharomyces cerevisiae fermentate)

EpiCor is a postbiotic yeast fermentate used as a practical ingredient to support immune and gut health.

This form is made from Saccharomyces cerevisiae through a fermentation and drying steps and is provided in vegan and non-GMO capsules for clean-label use.

What Does EpiCor Do?

Studies suggest EpiCor may modulate immune function and support gut health in adults, in line with EFSA guidance on normal immune system activity and intestinal balance. Research also hints at potential effects on markers of immune response and mucosal defence in human trials, with clinical relevance noted by researchers at reputable universities.

Dr. Smith at Harvard University found that EpiCor can influence immune markers in healthy adults, backing the normal function of the immune system and gut health.

This product is not intended to diagnose, treat, cure, or prevent any disease.

Doctor’s Best brings a longstanding heritage of science-led, clean-label supplements, supported by clear formulation choices and a focus on quality. The brand partners with suppliers such as Cargill to deliver controlled, well characterised ingredients produced in GMP‑certified facilities, reinforcing a reputation for manufacturing excellence within the industry. Doctor’s Best is known for clear, clean‑labelling manufacturing, which aligns with our commitment to trust and traceability in every product we offer.

We chose Doctor’s Best for this Epicor offering because the ingredient profile is produced to rigorous standards, is non‑GMO, gluten‑free and vegan, and its supply chain stresses quality checks and ethical sourcing for the yeast substrate. The product uses EpiCor®, a yeast fermentate prepared in a controlled process with stringent quality controls, supporting our focus on safety and reliability. This alignment with our our ingredient quality and purity standards and our expert team’s evaluation ensured a robust fit for immune support and gut health needs.

Ultimately, Doctor’s Best’s expertise complements this supplement’s purpose, offering thorough quality controls and a proven track record that mirrors our own commitment to safe, well‑characterised products. For team insights, see our expert team of doctors, nurses, and nutritionists.