Active B12/B-12 is a vitamin B12 supplement offering two coenzyme forms for quick absorption through the mouth, supporting methylation and energy. The two active forms, methylcobalamin and adenosylcobalamin, help support methylation pathways and mitochondrial energy production. Seeking Health delivers professional grade quality with top quality ingredients, meeting the strictest manufacturing standards to keep your B12 intake pure and effective.

Available Sizes & Variants:

60 Lozenges — easy to split for flexible dosing.

Benefits & Features:

• Lozenge delivery offers quick absorption.
• Two coenzyme forms work together to support methylation and mitochondrial energy production, which can help keep energy levels and cognitive function steady without the need for metabolic conversion.
• Designed for daily use with flexible dosing options.
• Quality and potency are high among vitamin b12 supplements, with cGMP compliant manufacturing.
• Digestive comfort improves with this formula.

Active B12/B-12 uses a dual coenzyme blend: 80% methylcobalamin and 20% adenosylcobalamin, chosen to support methylation and mitochondrial energy. Lozenges absorb quickly through the mouth, bypassing digestion for steadier B12. The formula is manufactured to professional grade standards with high quality ingredients and no artificial colours, dairy, gluten, soy or GMOs. Seeking Health's heritage is built on purity, transparency and careful formulation. This product sits well alongside a vitamin d supplement in a balanced wellness routine.

Vitamin B12, xylitol, ascorbyl palmitate, silica, and natural flavors.
MECOBALACTIVE® is a registered trademark trademark of HealthTech BioActives SLU d.b.a. Ferrer HealthTech

• GTIN: 810007520070
• Manufacturer: Seeking Health
• Categories: New ArrivalsPopular Supplement BrandsSeeking HealthVitamin B12 (Cobalamin) Supplements & Tablets
• 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 one lozenge daily, or as advised by your healthcare provider. You can break the lozenge into smaller pieces for a lower dose if desired. Avoid taking it within 5 hours of bedtime to prevent sleep disturbances.

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

The Active Ingredient Is: Vitamin B12 (Methylcobalamin and Adenosylcobalamin)

Vitamin B12 comes in bioactive coenzyme forms that take part directly in essential cellular processes. In this formula, two active forms, methylcobalamin and adenosylcobalamin, are supplied to support metabolic functions and energy-related processes. The lozenge format helps absorption through the oral mucosa when taken.

This pairing brings coenzyme B12 forms that are ready for use by the body, supporting methylation pathways and mitochondrial energy metabolism. The product includes other ingredients to enhance palatability and stability, while keeping a focus on the main active nutrient.

What Does Vitamin B12 Do?

Vitamin B12 helps with methylation and energy production by enabling B12-dependent enzyme activity in methylation and mitochondrial pathways. This supports normal bodily functions linked to DNA synthesis and cellular energy maintenance.

In line with EFSA and NHS-aligned understanding of nutrient function, the coenzyme forms help maintain these normal processes as part of a wider nutrient framework that supports daily wellness and energy balance.

Compliance disclaimer: This supplement isn't meant to diagnose, treat, cure, or prevent any disease.

Why Seeking Health Active B12 is Welzo Selected

Seeking Health is a reliable supplier with a solid track record in delivering professional-grade supplements and a commitment to top-quality ingredients. This brand stands out for its dual-coenzyme B12 formula using methylcobalamin and adenosylcobalamin, made to support quick absorption via lozenges and to bypass some digestive limits, a feature we recognise as important for this category.

To us, the brand’s emphasis on meeting or exceeding cGMP standards and its role as a professional-grade formulator with the highest-grade ingredients underlines its credibility in the market. Our evaluation also highlights Seeking Health as a specialist in delivering bioactive B12, aligning well with this product’s specific formulation and delivery method. This brand was evaluated by our medical team for compliance with the certifications we require, reinforcing our trust in its quality assurances.

Welzo chose Seeking Health for Active B12 because of the brand’s manufacturing philosophy, strict quality standards, and proven suitability for this coenzyme B12 formulation, which sets it apart from alternatives in the marketplace.