UK’s OCEANIUM cracks the prebiotic code with low-dose seaweed extract proven to boost gut health

Published: 26-Sep-2025

A new clinical study shows OCEANIUM’s OCEAN ACTIVES H+ delivers clinically proven gut health benefits at a 95% lower dose than traditional prebiotics, leading to reduced gas and bloating

UK biotech company OCEANIUM has clinically proven that gut health does not require large doses or uncomfortable side effects.

Their new seaweed-derived ingredient OCEAN ACTIVES H+ delivers the same microbiome benefits as traditional bulky prebiotics, but with only 250 mg per day – about the size of a vitamin C tablet.

The breakthrough addresses a major consumer pain point.

UK’s OCEANIUM cracks the prebiotic code with low-dose seaweed extract proven to boost gut healthConventional prebiotics such as inulin, GOS and FOS require 5-10 grams daily and often cause gas, bloating and digestive discomfort.

These symptoms often drive people to quit taking them.

"Consumers kept telling us that although their prebiotics work, they couldn’t handle the side effects, " said Neil Waslidge, R&D Manager, OCEANIUM.

"Our seaweed extract changes that, as one tiny dose gives you powerful gut health benefits with 87% less gas production."

Clinical results speak for themselves

A 12-week, double-blind study published in Microorganisms tracked 40 healthy adults taking either OCEAN ACTIVES H+ or a placebo.

The results included the following:

  • harmful bacteria linked to bloating and small intestinal bacterial overgrowth reduced by 29%
  • Nearly 9x improvement in the ratio of beneficial to harmful bacteria
  • butyrate production, a key compound that strengthens gut lining and reduces inflammation, increased by 20%
  • anti-inflammatory response increased by 33%, reducing the risk of gut flare-ups and discomfort after eating
  • Significant growth in beneficial bacteria strains that support immune function and cholesterol management.

Importantly, participants reported minimal digestive side effects, in stark contrast to high-dose fibre supplements that commonly cause gas and bloating.

Whilst the published study focused on digestive health, OCEANIUM's other research suggests OCEAN ACTIVES H+ may influence multiple body systems.

Evidence points to potential benefits for immune function, skin health, blood sugar regulation and mental clarity.

Sustainable innovation meets market demand

UK’s OCEANIUM cracks the prebiotic code with low-dose seaweed extract proven to boost gut healthOCEAN ACTIVES H+ is extracted from Saccharina Latissima, a type of sustainably farmed kelp.

As this seaweed grows, it improves ocean health by absorbing carbon and excess nutrients.

"Consumers increasingly want products that benefit both personal and planetary health," said Karen Scofield Seal, CEO and co-founder, OCEANIUM.

"Our seaweed farming partners are essentially carbon-negative food producers, which aligns perfectly with sustainability-focussed brands."


OCEAN ACTIVES H+ dissolves easily in water, making it suitable for everything from capsules and gummies to beverages and functional foods.

With self-affirmed GRAS status in the US, it is ready for immediate commercial use.

The company is currently conducting additional studies to further validate the systemic health benefits and expects to announce partnerships with major supplement and functional food brands in the coming months.

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