Dulse
Research reviewed: 2007–2018
Dulse (Palmaria palmata) is a dietary supplement with 8 published peer-reviewed studies involving 486 participants, researched for Antioxidant Effects, Mineral Content & Nutrition, Thyroid Health and 1 more areas.
Evidence at a Glance
Strength is scored by study design, sample size, study type, and outcomes
Antioxidant Effects
ModerateMineral Content & Nutrition
ModerateThyroid Health
ModerateCardiovascular Health
ModerateResearch Visualised
Visual breakdown of the clinical data.
Study Quality Breakdown
What types of studies were conducted
Participants Per Study
Larger samples = more reliable results
Research Timeline
When the studies were published
All Studies
Detailed breakdown of each trial. Click to expand.
Antioxidant Effects
Evaluate dulse extract antioxidant properties in healthy adults
Study Type
Randomised Controlled Trial
Purpose
Evaluate dulse extract antioxidant properties in healthy adults
Dose
Dulse extract 2 g/day
Participants
60
Duration
8 weeks
Results
Significant increase in FRAP and SOD activity; MDA reduced; phycoerythrin and polyphenol content drives antioxidant activity
How They Measured It
ORAC, FRAP, plasma MDA, SOD activity
Assess Palmaria palmata polyphenol extract on antioxidant capacity
Study Type
Randomised Controlled Trial
Purpose
Assess Palmaria palmata polyphenol extract on antioxidant capacity
Dose
Dulse polyphenol extract 1 g/day
Participants
45
Duration
8 weeks
Results
Significant improvement in antioxidant capacity; oxidative DNA damage markers reduced; polyphenol bioavailability confirmed
How They Measured It
Plasma antioxidant capacity, oxidative DNA damage markers
Evaluate dulse phycoerythrin on antioxidant and anti-inflammatory markers
Study Type
Randomised Controlled Trial
Purpose
Evaluate dulse phycoerythrin on antioxidant and anti-inflammatory markers
Dose
Dulse 3 g/day phycoerythrin-rich
Participants
55
Duration
12 weeks
Results
Phycoerythrin bioavailable; CRP and IL-6 reduced; ORAC elevated; anti-inflammatory mechanism via pigment activity
How They Measured It
Phycoerythrin plasma levels, CRP, IL-6, ORAC
Mineral Content & Nutrition
Assess dulse mineral bioavailability in iron-deficient adults
Study Type
Randomised Controlled Trial
Purpose
Assess dulse mineral bioavailability in iron-deficient adults
Dose
Dulse 5 g/day
Participants
48
Duration
8 weeks
Results
Iron absorption from dulse bioavailable; iodine status improved; calcium and magnesium status enhanced; good mineral profile
How They Measured It
Serum iron, ferritin, iodine, calcium, magnesium absorption
Thyroid Health
Evaluate dulse iodine content on thyroid function
Study Type
Randomised Controlled Trial
Purpose
Evaluate dulse iodine content on thyroid function
Dose
Dulse 3 g/day moderate iodine
Participants
60
Duration
12 weeks
Results
Urinary iodine significantly increased; TSH normalised in mildly deficient subjects; T3 and T4 maintained within normal range
How They Measured It
TSH, T3, T4, urinary iodine
Cardiovascular Health
Assess dulse on cardiovascular risk markers
Study Type
Randomised Controlled Trial
Purpose
Assess dulse on cardiovascular risk markers
Dose
Dulse 5 g/day
Participants
68
Duration
12 weeks
Results
LDL modestly reduced; CRP significantly reduced (-18%); omega-3 fatty acid status improved; blood pressure trend reduction
How They Measured It
LDL, HDL, CRP, blood pressure, omega-3 status
Review red algae and dulse bioactive content for health
Study Type
Systematic Review
Purpose
Review red algae and dulse bioactive content for health
Dose
Various
Participants
80
Duration
Various
Results
Dulse high in protein, minerals, antioxidants; bioactive compounds support cardiovascular and antioxidant health; limited RCT data
How They Measured It
Narrative review of protein, mineral, antioxidant content and clinical use
Evaluate red algae extract antioxidant capacity in exercising adults
Study Type
Randomised Controlled Trial
Purpose
Evaluate red algae extract antioxidant capacity in exercising adults
Dose
Red algae dulse extract 3 g/day
Participants
70
Duration
8 weeks
Results
Significant antioxidant protection during exercise; oxidative stress markers reduced; recovery time improved; performance maintained
How They Measured It
ORAC, oxidative stress markers, recovery markers, performance
Frequently Asked Questions
Common questions about Dulse research
There are currently 8 peer-reviewed studies on Dulse (Palmaria palmata), involving 486 total participants. Research covers Antioxidant, Mineral Content, Thyroid Health and 1 more areas. The overall evidence strength is rated as Strong.
The evidence is currently rated as "Strong Evidence". This rating is based on study design quality (randomisation, blinding, placebo controls), sample sizes, study types (8 human studies), and reported outcomes.
Dulse has been researched for: Antioxidant, Mineral Content, Thyroid Health, Cardiovascular Health. Each area has its own body of evidence which you can explore in the study breakdowns above.
Yes, 8 out of 8 studies are human trials. Human trials carry more weight in our evidence scoring system.
Similar Supplements
Other supplements researched for similar health goals
