# Sea Grapes **Canonical URL:** https://ingredients.hermeticasuperfoods.com/ingredients/sea-grapes **Data Source:** Hermetica Superfoods Ingredient Encyclopedia **Updated:** 2026-03-15 **Evidence Score:** 4 / 10 **Category:** Other **Also Known As:** Caulerpa lentillifera, Umibudo, Green Caviar ## Overview Sea grapes (*Caulerpa lentillifera*) are recognized for their rich content of essential minerals like iodine, calcium, and magnesium, alongside antioxidant compounds such as polyphenols and carotenoids. While these components contribute to general nutritional support and [antioxidant activity](/ingredients/condition/antioxidant), detailed mechanisms of specific isolated compounds in humans are not yet fully elucidated in current research. ## Health Benefits - **Rich in Iodine**: Supports [thyroid function](/ingredients/condition/hormonal), hormonal balance, and metabolic health. - **Mineral-Rich**: Provides calcium, magnesium, and potassium for bone, muscle, and electrolyte support. - **Antioxidant-Rich**: Contains polyphenols and carotenoids that reduce [oxidative stress](/ingredients/condition/antioxidant) and enhance [immunity](/ingredients/condition/immune-support). - **Hydration Support**: High water content helps replenish fluids and maintain hydration. - **Gut Health**: Provides fiber and prebiotics that nourish the [gut microbiome](/ingredients/condition/gut-health) and promote digestive regularity. ## Mechanism of Action The health benefits of *Caulerpa lentillifera* primarily stem from its nutritional profile, providing iodine crucial for the synthesis of [thyroid](/ingredients/condition/hormonal) hormones (T3 and T4), which regulate [metabolism](/ingredients/condition/weight-management) and [energy production](/ingredients/condition/energy). Additionally, its rich mineral content supports various physiological functions; for example, calcium and magnesium contribute to bone density and muscle contraction, while potassium aids in electrolyte balance. Although high in general antioxidants like polyphenols and carotenoids, the specific pathways or receptors modulated by isolated compounds from sea grapes for reducing [oxidative stress](/ingredients/condition/antioxidant) require further detailed investigation. ## Clinical Summary Despite its traditional consumption and commercial cultivation, comprehensive human clinical trials specifically evaluating the therapeutic health benefits of *Caulerpa lentillifera* are not detailed in current research. The purported benefits, such as enhanced [thyroid function](/ingredients/condition/hormonal) or reduced [oxidative stress](/ingredients/condition/antioxidant), are largely extrapolated from its nutritional composition and general understanding of nutrients like iodine, calcium, and broad-spectrum antioxidants. Therefore, while it is a nutrient-dense food, direct clinical evidence demonstrating specific therapeutic outcomes or dose-response relationships in humans is currently limited. ## Nutritional Profile - Minerals: Iodine, Calcium, Magnesium, Potassium - [Antioxidant](/ingredients/condition/antioxidant)s: Carotenoids, Polyphenols - Dietary Fiber & [Prebiotic](/ingredients/condition/gut-health)s ## Dosage & Preparation - Traditional Uses: Consumed fresh in salads, sushi, and dipping sauces. In coastal cuisines, they may be pickled or added to soups and broths. - Modern Uses: Featured in wellness cuisine, smoothies, snacks, and supplements for [thyroid](/ingredients/condition/hormonal) and gut health. Recommended intake: 1/4–1/2 cup fresh or 200–400 mg extract daily. ## Safety & Drug Interactions Caulerpa lentillifera is generally considered safe when consumed as a food; however, due to its high iodine content, individuals with pre-existing [thyroid](/ingredients/condition/hormonal) conditions, particularly hyperthyroidism, should exercise caution to avoid excessive iodine intake. Overconsumption of iodine can exacerbate thyroid dysfunction and may interfere with thyroid hormone medications, requiring medical consultation before regular use as a supplement. For pregnant and breastfeeding individuals, moderate consumption as part of a balanced diet is likely safe, but extremely high intake of iodine from any source should be avoided without medical supervision. ## Scientific Research Sea grape polysaccharides (25-50 μg/ml) induced 20-, 35-, and 15-fold mRNA increases in OCT4, NANOG, SOX2 in dermal papilla cells, with protein and CD133/CD44 elevations; similar effects (1.5-2.5-fold) in bone marrow stem cells, plus anti-melanogenic activity.[2] In rats with cafeteria-fed diet-induced metabolic syndrome, sea grape extract (450 mg/kg BW) raised liver PGC-1α and SOD levels dose-dependently, improving [antioxidant](/ingredients/condition/antioxidant) capacity.[5] Another rat study showed sea grapes (16.6% insoluble fiber) reduced [blood pressure](/ingredients/condition/heart-health), modulated gut microbiota (lowered Firmicutes/Bacteroidetes), and attenuated cardiovascular/metabolic symptoms via SCFAs and anti-[inflammation](/ingredients/condition/inflammation).[6] Ethanol extracts increased PGC-1α beyond control levels, enhancing [mitochondrial biogenesis](/ingredients/condition/energy) and glucose/cholesterol regulation in high-fat diet rats.[3] No human clinical trials identified; evidence limited to in vitro cells and rodent models.[1][2] ## Historical & Cultural Context Sea Grapes have long held cultural significance in Japan, the Philippines, and coastal Southeast Asia. They have been used in traditional medicine to support [thyroid](/ingredients/condition/hormonal) health, [digestion](/ingredients/condition/gut-health), and skin vitality. Their ability to flourish in saline environments has earned them symbolic value as a food of endurance, vitality, and renewal. ## Synergistic Combinations Role: Functional whole-food/ingredient Intention: Gut & [Microbiome](/ingredients/condition/gut-health) | 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 Sea Grapes? Sea grapes, primarily referring to *Caulerpa lentillifera*, are an edible marine algae known for their distinctive small, bead-like spheres and crisp texture. They are widely consumed in Southeast Asia, the Pacific Islands, and East Asia, often enjoyed raw in salads or as a garnish. ### What are the primary nutritional benefits of Sea Grapes? Sea grapes are highly nutritious, providing a rich source of iodine, which is essential for thyroid function and metabolic health. They also contain vital minerals like calcium, magnesium, and potassium, alongside antioxidants such as polyphenols and carotenoids, supporting bone health, muscle function, and immunity. ### Can Sea Grapes support thyroid health? Yes, sea grapes are a natural source of iodine, a critical component for the synthesis of thyroid hormones. Adequate iodine intake is necessary for proper thyroid function, hormonal balance, and maintaining a healthy metabolism. ### Are there any known side effects or interactions with Sea Grapes? While generally safe as a food, individuals with thyroid conditions, especially hyperthyroidism, should consume sea grapes cautiously due to their high iodine content. Excessive iodine intake can interfere with thyroid medications and may exacerbate existing thyroid issues, making medical consultation advisable. ### How do Sea Grapes contribute to antioxidant support? Sea grapes contain natural antioxidant compounds, including polyphenols and carotenoids, which help combat oxidative stress in the body. These compounds protect cells from damage caused by free radicals, potentially enhancing overall cellular health and immune function. ### How do Sea Grapes compare to other seaweed supplements for iodine content? Sea Grapes are among the richest natural sources of bioavailable iodine, typically containing 1,000–8,000 mcg per 100g depending on harvesting location and processing methods. While other seaweeds like nori and kelp also provide iodine, Sea Grapes offer a more balanced mineral profile with additional calcium, magnesium, and potassium, making them suitable for broader nutritional support beyond thyroid function alone. The iodine in Sea Grapes is naturally chelated with polysaccharides, which may enhance absorption compared to isolated iodine supplements. ### Is Sea Grapes safe for pregnant and breastfeeding women? Sea Grapes can support iodine needs during pregnancy and lactation, which is critical for fetal brain development and maternal metabolic health; however, intake should be monitored to avoid excessive iodine, which may affect thyroid function. Pregnant and breastfeeding women should consult a healthcare provider to determine an appropriate dose, as recommended dietary allowance for iodine is 220 mcg during pregnancy and 290 mcg during lactation. Fresh Sea Grapes from reputable sources are generally safer than concentrated supplements due to more predictable iodine levels. ### What is the most effective form of Sea Grapes for maximum nutrient absorption? Fresh or lightly dried Sea Grapes retain the highest concentrations of water-soluble minerals and polyphenols compared to heavily processed powders or extracts, making them ideal for nutrient bioavailability. Consuming Sea Grapes in their whole form (fresh or rehydrated) allows the natural polysaccharide matrix to support mineral absorption and promote prebiotic effects for gut health. If using a supplement powder, cold-processed or freeze-dried forms preserve more antioxidants and minerals than heat-treated alternatives. ## References Sources: https://pubmed.ncbi.nlm.nih.gov/30822551; https://doi.org/10.1016/j.jff.2020.103722; https://www.sciencedirect.com/science/article/pii/S1874391919307994 --- *Source: Hermetica Superfoods Ingredient Encyclopedia — https://ingredients.hermeticasuperfoods.com* *License: CC BY-NC-SA 4.0 — Attribution required. Commercial use: admin@hermeticasuperfoods.com*