Undecylex helps curb yeast growth thanks to undecylenic acid, supporting a balanced gut microbiota and smoother digestion, backed by Klaire Labs' trusted purity standards.

Available Sizes & Variants:

120 tablets - Ideal for regular dosing as directed by a healthcare professional.

Benefits & Features:

• Supports a healthy gut balance day after day.
• Undecylenic acid targets yeast growth and sorbic acid provides antimicrobial support.
• Berberine from Indian Barberry standardised to 6%, goldthread extract at 20%, and green tea polyphenols at 95% polyphenols with 50% EGCG deliver consistent activity across the board.
• GMP compliant manufacturing and allergen controls support safety and consistent potency.
• Combines botanicals with undecylenic acid for wide-spectrum gut support.

Undecylex brings together a targeted blend developed by Klaire Labs, designed to discourage yeast and other undesirable gut microbes. The key actives: calcium undecylenate (undecylenic acid), berberine from Indian Barberry standardised to 6%, goldthread extract at 20%, and green tea polyphenols at 95% polyphenols with 50% EGCG deliver consistent activity. Klaire Labs upholds strict purity, allergen control, and GMP compliant manufacturing. For gut wellness, many customers pair this with probiotics for gut health. Note: this is not a ferrous sulfate product or a vitamin d supplement.

(other) Silicified microcrystalline cellulose, vegetable stearine, silicon dioxide, croscarmellose sodium, cellulose, stearic acid, magnesium stearate and cellulose coating.

• GTIN: 828054005402
• Manufacturer: Klaire Labs
• Categories: CHECKOUT UPSELLKlaire LabsNew ArrivalsPopular Supplement Brands
• 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.

The supplement should be taken with food, either once a day or up to six times a day, as recommended by a healthcare professional.

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

1. Undecylex is a powerful supplement that contains undecylenic acid, which has been shown to have antifungal and antibacterial properties. This makes it an excellent choice for supporting a healthy immune system and promoting overall wellness.
2. In addition to its immune-boosting properties, Undecylex also supports gastrointestinal health by maintaining a balanced microbial environment in the gut. This can help to alleviate symptoms of digestive issues such as bloating, gas, and discomfort.

The Active Ingredient Is: Undecylenic Acid (Calcium Undecylenate)

Undecylenic acid is a monounsaturated fatty acid sourced from calcium undecylenate, a compound used to support gut microbial balance. This ingredient comes in a form that delivers undecylenic acid for activity inside the digestive tract.

This formulation blends undecylenic acid with other botanical and acid components to support the gut ecosystem, matching Klaire Labs’ emphasis on purity and potency.

What Does Undecylenic Acid Do?

Undecylenic acid helps curb hyphal growth in yeast cells, contributing to a balanced gut environment as part of a broader antimicrobial approach. This function is described in the context of keeping digestive flora balance in relevant research and regulatory discussions.

Its action is supported by berberine, green tea polyphenols and sorbic acid within the same formula, which together help microbial balance while remaining aligned with EFSA uptake principles.

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

Klaire Labs is Welzo's trusted pick for Undecylex because this brand is widely seen as doctor-approved and professional-grade, with a longstanding reputation for strict purity and potency standards in integrative and functional medicine practices. Their commitment to reliable ingredient sourcing and consistent third-party allergen-free status underpins our confidence in supply quality and safety.

From a quality viewpoint, Klaire Labs manufactures under rigorous guidelines that emphasise allergen control and the absence of artificial additives or preservatives, aligning with our high-quality expectations and our commitment to transparent manufacturing processes. This is reinforced by their established reputation among healthcare professionals for dependable, high-purity products, making Klaire Labs a standout choice in a competitive market.

This brand stands out for Welzo because of their proven manufacturing discipline and focus on consumer safety, which directly translates to consistent product integrity for Undecylex. Our medical team evaluates Klaire Labs against our supplement quality standards to ensure alignment with our rigorous criteria our medical team and our supplement quality standards.

In partnering with Klaire Labs, Welzo benefits from a forward-looking dedication to purity and traceable quality that supports user confidence and reliable results for this specific antimicrobial-focused supplement.