# Seaweed Grape **Canonical URL:** https://ingredients.hermeticasuperfoods.com/ingredients/seaweed-grape **Data Source:** Hermetica Superfoods Ingredient Encyclopedia **Updated:** 2026-03-15 **Evidence Score:** 8 / 10 **Category:** Other **Also Known As:** Caulerpa racemosa, Sea grapes, Green caviar, Caulerpa lentillifera ## Overview Caulerpa racemosa, commonly called seaweed grape, contains sulfated polysaccharides and mycosporine-like amino acids that upregulate [antioxidant](/ingredients/condition/antioxidant) enzymes including superoxide dismutase, catalase, and [glutathione](/ingredients/condition/detox) peroxidases. These bioactive compounds inhibit [NF-κB](/ingredients/condition/inflammation) activation while promoting cellular defense pathways through Nrf2 upregulation and AMPK activation. ## Health Benefits - Supports [thyroid function](/ingredients/condition/hormonal) by providing essential iodine, which regulates [metabolism](/ingredients/condition/weight-management) and energy balance. - Enhances [cardiovascular health](/ingredients/condition/heart-health) by improving circulation and regulating blood pressure through potassium, magnesium, and omega-3 fatty acids. - Strengthens immune defenses and reduces [oxidative stress](/ingredients/condition/antioxidant) with potent antioxidants like chlorophyll, beta-carotene, and vitamin C. - Promotes digestive health by supporting gut motility and [microbiome diversity](/ingredients/condition/gut-health) through soluble fiber and polysaccharides. - Supports bone density, muscle function, and oxygen transport via its rich content of calcium, magnesium, and iron. - Reduces systemic [inflammation](/ingredients/condition/inflammation) and promotes skin vitality due to omega-3 fatty acids and a spectrum of antioxidants. ## Mechanism of Action Sulfated polysaccharides and phlorotannins in seaweed grape activate [antioxidant](/ingredients/condition/antioxidant) enzyme systems by upregulating superoxide dismutase, catalase, and [glutathione](/ingredients/condition/detox) peroxidases, converting harmful superoxide radicals to water. [Anti-inflammatory](/ingredients/condition/inflammation) effects occur through NF-κB pathway inhibition, reducing TNF-α, IL-6, and COX-2 expression. Additional mechanisms include Nrf2 pathway activation for cellular protection and AMPK stimulation promoting [autophagy](/ingredients/condition/longevity) and [mitochondrial function](/ingredients/condition/energy). ## Clinical Summary Current evidence for seaweed grape consists primarily of in vitro studies and plant defense research rather than human clinical trials. Plant studies using Rugulopteryx okamurae extract showed increased defense gene expression (PR10, PAL, STS48, GST1) at 24 hours post-application with elevated [antioxidant](/ingredients/condition/antioxidant) enzyme activity. Preliminary research on related Caulerpa species demonstrates antioxidant and [anti-inflammatory](/ingredients/condition/inflammation) properties through enzyme assays, but quantified human outcomes are lacking. The evidence base remains limited to laboratory studies without controlled human trials providing specific therapeutic dosages or clinical endpoints. ## Nutritional Profile - Iodine: Essential for [thyroid](/ingredients/condition/hormonal) support and metabolic regulation. - Potassium, Magnesium, Calcium, Iron: Support [cardiovascular health](/ingredients/condition/heart-health), muscle function, bone density, and oxygen transport. - Omega-3 Fatty Acids: Provide cardiovascular, [cognitive](/ingredients/condition/cognitive), and [anti-inflammatory](/ingredients/condition/inflammation) benefits. - Chlorophyll, Beta-carotene, Vitamin C: Offer potent [antioxidant protection](/ingredients/condition/antioxidant) and immune support. - Polysaccharides: Contribute to [immune modulation](/ingredients/condition/immune-support) and gut health. - Dietary Fiber: Aids digestive wellness and satiety. ## Dosage & Preparation - Traditional: Consumed fresh by Okinawan and Filipino coastal communities for vitality, [longevity](/ingredients/condition/longevity), and [digestive health](/ingredients/condition/gut-health). - Modern: Incorporated into poke bowls, sushi rolls, vegan seafood alternatives, and functional health foods. - Dosage: 50–100 grams fresh daily or 500–1000 mg standardized extract. ## Safety & Drug Interactions No specific safety data, drug interactions, or contraindications have been established for seaweed grape in published research. The lack of human clinical trials means adverse effects, optimal dosing parameters, and potential interactions with medications remain unknown. Individuals with [thyroid](/ingredients/condition/hormonal) conditions should exercise caution due to potential iodine content typical of marine algae. Pregnant and breastfeeding women should avoid use until comprehensive safety studies establish appropriate guidelines for these populations. ## Scientific Research Research indicates its potential in supporting [thyroid](/ingredients/condition/hormonal) health, [cardiovascular](/ingredients/condition/heart-health) function, and [antioxidant](/ingredients/condition/antioxidant) defense, with studies exploring its metabolic and [anti-inflammatory](/ingredients/condition/inflammation) properties. Preliminary findings suggest benefits for gut health and overall systemic wellness. ## Historical & Cultural Context Deeply woven into the culinary and healing traditions of Okinawa and the Pacific, Seaweed Grape symbolized vitality, [longevity](/ingredients/condition/longevity), and the bountiful strength of the ocean. It is valued in Okinawan cuisine as a symbol of long life and maritime resilience, bridging coastal tradition with contemporary holistic wellness. ## Synergistic Combinations Role: Polyphenol/[antioxidant](/ingredients/condition/antioxidant) base Intention: Cardio & Circulation | Energy & [Metabolism](/ingredients/condition/weight-management) Primary Pairings: - Turmeric (Curcuma longa) - Ginger (Zingiber officinale) - Vitamin C (Ascorbic Acid) - Ashwagandha (Withania somnifera) ## Frequently Asked Questions ### What are the main bioactive compounds in seaweed grape? Seaweed grape contains sulfated polysaccharides, mycosporine-like amino acids, phlorotannins, and fucoxanthin as primary bioactive compounds. These molecules provide antioxidant protection and anti-inflammatory effects through multiple cellular pathways. ### How does seaweed grape support antioxidant defenses? Seaweed grape upregulates key antioxidant enzymes including superoxide dismutase, catalase, and glutathione peroxidases that neutralize harmful free radicals. The sulfated polysaccharides activate Nrf2 pathways, enhancing cellular resistance to oxidative stress. ### Are there clinical studies proving seaweed grape benefits? Current evidence consists mainly of in vitro and plant studies rather than human clinical trials. While laboratory research shows promising antioxidant and anti-inflammatory activities, controlled human studies are needed to establish therapeutic efficacy. ### What is the difference between seaweed grape species? Caulerpa racemosa and Caulerpa lentillifera are both called seaweed grape but may have different bioactive profiles. C. racemosa forms grape-like clusters while C. lentillifera produces small spherical vesicles, though both contain similar sulfated polysaccharides. ### Is seaweed grape safe for people with thyroid conditions? Safety data for seaweed grape in thyroid conditions is not established through clinical research. Given that marine algae typically contain iodine, individuals with thyroid disorders should consult healthcare providers before use to avoid potential complications. ### How much seaweed grape should I take daily, and when is the best time? Typical seaweed grape supplementation ranges from 500–2,000 mg daily, though optimal dosage depends on individual health goals and iodine intake from other sources. Taking seaweed grape with meals enhances absorption of fat-soluble compounds like beta-carotene and supports better tolerability in the digestive system. Always start with lower doses to assess tolerance and consult a healthcare provider if you have existing thyroid conditions or take thyroid medications. ### Does seaweed grape interact with blood pressure or thyroid medications? Seaweed grape's potassium and magnesium content may enhance the effects of blood pressure medications, potentially requiring dose adjustment under medical supervision. The iodine content can interact with thyroid medications or affect thyroid hormone levels, making it critical to monitor thyroid function if you take levothyroxine or other thyroid drugs. Discuss seaweed grape supplementation with your doctor before combining it with cardiovascular or endocrine medications. ### Is seaweed grape safe during pregnancy, and are there age restrictions? Seaweed grape is generally safe during pregnancy in moderate amounts due to its iodine content supporting fetal development, but excessive iodine intake during pregnancy should be avoided—consult an obstetrician for personalized guidance. For children, seaweed grape can support growth and immune function, though pediatric dosing should be lower than adult recommendations and adjusted by a pediatrician. Elderly individuals benefit from seaweed grape's cardiovascular and bone-supporting minerals, but those on anticoagulants or with kidney disease should seek medical clearance first. ## References Sources: https://pubmed.ncbi.nlm.nih.gov/32469344; https://www.sciencedirect.com/science/article/pii/S0963996920301989; https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7108521/ --- *Source: Hermetica Superfoods Ingredient Encyclopedia — https://ingredients.hermeticasuperfoods.com* *License: CC BY-NC-SA 4.0 — Attribution required. Commercial use: admin@hermeticasuperfoods.com*