B Complex Plus is a potent vitamin B complex supplement that supports energy production and nerve health for busy days. This product is designed with activated folate and methylcobalamin B12 for better absorption, and it helps keep metabolism and nervous system function on track. Klaire Labs is trusted for professional grade supplements, with rigorous quality standards that you can rely on.

Available Sizes & Variants:

100 capsules B Complex Plus - convenient daily dose for steady energy and nerve support.

Benefits & Features:

• Supports steady energy throughout the day.
• Nerve health is supported by the combination of B6, B12 and folate, helping maintain proper neurotransmitter function for clearer thinking and better mood throughout the day.
• Activated folate and B12 support bioavailability for these essential nutrients.
• Daily capsules simplify routine, letting you focus on your day while your body gets a broad spectrum of the vitamins it relies on for energy, metabolism, and immune resilience.
• Gentle daily support with carefully chosen ingredients and no unnecessary fillers.

Klaire Labs has built a long standing reputation for professional grade supplements and strict quality controls, reflecting its heritage in thoughtful formulation. This B Complex Plus uses activated folate and methylcobalamin B12 to improve bioavailability, a feature customers notice when daily energy and focus feel more reliable. The brand's manufacturing ethos emphasises purity and potency, with high grade ingredients and careful sourcing that many wellness professionals trust. Many customers also pair it with a vitamin d supplement or probiotics, and magnesium glycinate can be a helpful partner for muscle comfort.

(other) Vegetarian capsule (hydroxypropyl methylcellulose, water), microcrystalline cellulose, and ascorbyl palmitate.

• GTIN: 709616803103
• 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.

Take one capsule daily or as advised by your healthcare provider.

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

The Active Ingredient Is: Niacin (Vitamin B3)

Niacin is a water-soluble B vitamin that offers a central role in cellular energy production and metabolic processes.

This form is shown as part of a B complex blend, with niacin contributing to its overall profile of essential B vitamins for energy and nervous system support.

What Does Niacin Do?

Niacin is involved in energy metabolism and supports normal function of the nervous system, in line with EFSA guidance and NHS information on B vitamins.

Evidence from researchers at the University of Cambridge suggests niacin contributes to energy production processes and nerve health through its metabolic roles, reinforcing its place within a comprehensive B vitamin profile.

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

Klaire Labs stands out as a partner for B Complex Plus by aligning with Welzo’s commitment to high quality, professional-grade supplements. This brand is widely recognised in the industry for producing professional-grade products and for prioritising purity and potency in its formulations, which resonated strongly with our standards.

This brand differentiates itself through a heritage of supplying reliable, clinician-focused products that emphasise rigorous quality, and this reputation helped us choose Klaire Labs over other brands. Klaire Labs’ approach to quality is reflected in its use of high‑grade ingredients and its consistent alignment with professional norms, which informs our confidence in its manufacturing philosophy.

This product is particularly well suited to Klaire Labs’ strengths, offering activated folate and methylcobalamin alongside a comprehensive B‑vitamin profile, designed for reliable nutrient support. Our team evaluated Klaire Labs against our quality criteria and confirmed its suitability for a product like B Complex Plus. This choice matters to customers because it translates to trust and safety in everyday use. For more on our team and standards, see our medical team and our quality assurance criteria.