Overview
Brown seaweed carotenoid studied for visceral fat reduction.
- Undaria pinnatifida
- Hijiki
- Brown seaweed extract
Mechanism of action
Upregulates UCP1 in white adipose tissue, increasing thermogenesis.
- · UCP1 ↑
Effects on the body
Organ system effects
Evidence-based benefits
Modest visceral fat reduction in obese women
Limited evidencePotential side effects
- · Fucoxanthin is generally well-tolerated at evidence-based doses
- · Mild GI discomfort (nausea, loose stools, or bloating) possible at higher intakes
- · Headache or transient fatigue reported by a small fraction of users
- · Allergic or hypersensitivity reaction (rash, itching, swelling)
- · Sleep disturbance if taken late in the day
- · Discontinue and seek medical advice if symptoms are severe, persistent, or include difficulty breathing
Drug interactions
Supplement interactions
- A high-quality multivitaminCovers micronutrient cofactors that support most supplement pathways.
- Omega-3 (EPA/DHA)Foundational anti-inflammatory support that complements most regimens.
No specific avoidances listed.
Dosing & bioavailability
Where to buy
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Third-party testedIndependently verified Fucoxanthin — look for USP, NSF, or Informed Sport seals on the label for purity and dose accuracy.Fucoxanthin third party tested NSF
CapsulesPre-measured Fucoxanthin capsules — easiest for travel and consistent daily dosing without scoops or scales.Fucoxanthin capsules
PowderBulk unflavored Fucoxanthin powder — best cost-per-gram and flexible dosing for stacking or mixing into drinks.Fucoxanthin powder unflavored
Best sellersMost-purchased Fucoxanthin products on Amazon — a quick way to see what's reviewed widely before you commit.Fucoxanthin best sellerScientific evidence8Show studiesHide studies
Xanthigen (fucoxanthin + pomegranate) for weight loss
Abidov M, et al.
16-week RCT in obese women.
Significant weight and body-fat reduction.
PubMed: Fucoxanthin — Modest visceral fat reduction in obese women
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