Source Naturals Red Marine Algae backs immune health and helps strengthen your body's natural defences with carrageenan-rich red seaweed extract. That key ingredient, carrageenan-rich red marine algae polysaccharides, helps tune immune responses by backing the body's natural shields against unfriendly proteins, and so it promotes calm, balanced inflammatory responses. It’s vegetarian and free from common allergens, which keeps things clean and reflects Source Naturals' dedication to top-quality supplements.

Available Sizes & Variants:

350 mg Red Marine Algae tablets - simple daily support for immune health and natural defence

Benefits & Features:

• Supports immune health with natural defence help
• Carrageenan-rich red marine algae polysaccharides help tune immune responses by backing the body's natural shields against unfriendly proteins, while promoting calm, balanced inflammatory responses
• Natural antioxidants help guard cells from oxidative stress, supporting overall vitality
• Antiviral properties may help support the body's defence against certain viruses
• Vegetarian and hypoallergenic formula offers a clean, daily immune support option

Source Naturals has built its reputation on straightforward, dependable supplements you can trust. Red marine algae here comes from the seaweed Gigartina skottsbergii and carries carrageenans that may support immune defence. The tablets are vegetarian and free from common allergens, with microcrystalline cellulose, stearic acid, modified cellulose gum and silica as standard excipients. The blend reflects careful sourcing and a commitment to quality that customers recognise, from ethical harvest practices to rigorous quality checks. Genuine quality matters. Trust is earned.

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.

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

The Active Ingredient Is: Red Marine Algae Extract (Gigartina skottsbergii)

Red marine algae extract is a seaweed-derived ingredient containing polysaccharides, notably carrageenans, that contribute to normal immune function and cellular defence mechanisms.

This form is sourced from red seaweed and provides natural polysaccharide compounds that participate in the body’s frontline defence and antioxidant activity.

What Does Red Marine Algae Do?

Red marine algae supports immune health by helping modulate the body’s natural responses and by reducing the binding of unfriendly proteins to cell surfaces. It also provides antioxidant activity that helps protect cells from oxidative stress and can be associated with joint mobility support in some contexts.

These effects align with traditional and scientific observations of carrageenan-containing seaweeds contributing to immune modulation and antioxidant activity, as recognised in EFSA-aligned summaries of nutrient function.

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

Source Naturals has earned recognition in the supplement space for dependable marine-derived ingredients and a transparent, Vegetarian formulation. We selected Source Naturals for this Red Marine Algae product because their approach aligns with Welzo’s commitment to quality and clear ingredient science, prioritising purity and consistent sourcing. This brand is known for delivering carrageenan-rich red seaweed extracts, which are linked in the referenced material with immune support and antioxidant activity, supporting the body’s natural barriers and defence systems. Our team valued this alignment with Welzo’s standards and consulted Welzo's healthcare professionals to ensure the formulation meets our internal expectations for safety and transparency, in line with our supplement quality standards.

Product-specific fit is strong: the supplement provides a vegetarian, allergen-friendly option whose primary active ingredient is red marine algae polysaccharides, noted for potential immune modulation and antioxidant activity. This combination makes Source Naturals a natural partner for this supplement, delivering a credible, science-aligned offering that fits Welzo’s rigorous vetting process.