OptiBiotix Health’s SlimBiome® Debuts in Holland & Barrett’s FORMI

3 min read | September 02, 2026 07:01 AM BST | By
Ishan Mudgal
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OptiBiotix Health plc (AIM: OPTI, OTCQB: OPTBF) has revealed that Holland & Barrett has introduced its new FORMI™ Weight Loss Complex, a raspberry-flavored powdered drink sachet featuring OptiBiotix’s clinically proven SlimBiome® ingredient. This product is now accessible across H&B’s extensive network of over 1,600 stores in 19 countries, including upwards of 700 outlets in the UK. This launch follows the signing of a three-year non-exclusive trademark licence agreement in December 2025 and represents a major advancement in OptiBiotix’s commercial partnership with one of Europe’s leading health and wellness retailers. Market watchers will be monitoring the product’s performance within the rapidly growing GLP-1 support supplements sector.

Key Points

• OptiBiotix Health plc (AIM: OPTI, OTCQB: OPTBF) specializes in microbiome-based ingredients such as SlimBiome®, WellBiome®, and SweetBiotix®
• Holland & Barrett has launched its own-brand FORMI™ Weight Loss Complex containing OptiBiotix’s patented SlimBiome® formulation
• The December 2025 agreement grants H&B a three-year non-exclusive licence to use the SlimBiome® and LeanBiome® trademarks on new products
• Investors should anticipate further FORMI™ product expansions and additional licensing deals as OptiBiotix targets the GLP-1 support supplements market

SlimBiome® Integrated into Holland & Barrett’s FORMI™ Range

The FORMI™ Weight Loss Complex features on-pack claims supporting weight management, blood sugar regulation, and satiety. It is designed for consumers seeking non-pharmaceutical weight management solutions, individuals intolerant to GLP-1 therapies, and those requiring nutritional support after ceasing GLP-1 medications. The non-exclusive December 2025 licence covers both SlimBiome® and LeanBiome® trademarks, enabling H&B to incorporate OptiBiotix’s patented mineral-enriched dietary fibre and prebiotic ingredients into its wider FORMI™ brand, which also includes active nutrition and healthy food offerings.

Global GLP-1 Support Supplements Market Projected to Grow from $1.8 Billion in 2025 to $8.9 Billion by 2034

This development underscores a structural shift in the weight management industry driven by GLP-1 medications. Research published in the BMJ in January 2026 by the University of Oxford found that individuals discontinuing weight-loss drugs tend to regain weight faster than those ending traditional diet programmes. Additionally, a 2023 study in The Journal of Obesity reported high discontinuation rates among GLP-1 users. MarketIntelo (2026) estimates the global GLP-1 support supplements market was valued at approximately $1.8 billion in 2025 and forecasts growth to $8.9 billion by 2034, reflecting a compound annual growth rate of about 18.5%.

FORMI™ Launch Complements Holland & Barrett’s May 2026 Clinical Weight Management Collaboration with Phlo

The FORMI™ Weight Loss Complex launch follows Holland & Barrett’s May 2026 announcement of a clinical weight management partnership with online pharmacy Phlo, which offers H&B customers access to GLP-1 anti-obesity medications and related services. This integrated approach—combining pharmaceutical treatments with nutritional products—mirrors broader trends in the weight management sector. OptiBiotix also reported growing interest from other companies aiming to licence SlimBiome® for their own branded products, acquire finished goods developed by OptiBiotix, or incorporate SlimBiome® into flavoured or unflavoured sachets as part of range expansions.

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