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Sea Lettuce: Applications and Formulation Tips
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Sea Lettuce: Applications and Formulation Tips

Date published:
February 20, 2025
Writers/Contributors:
Arnav Mariwala
Arnav is the founder and CEO of MariTide, a company developing advanced cultivation systems for high-protein, nutrient-dense seaweeds in India. Their first focus is on Sea Lettuce.

Applications

   Nutritional Supplements

   Nutraceutical Extracts

   Superfood Supplement

   Nutrition Enhancer in Foods

   Whole Food Applications

   Seasonings

Growing Trends

Formulation Tips

   Formats

   Dosage

   Tips for Formulation

Sources

Applications

Sea Lettuce’s versatility has resulted in it gaining traction as a functional food ingredient, nutritional supplement, and a source of nutraceutical extracts (particularly Ulvan). Some examples of product categories are listed below:

Category Takeaway Form Factor
Nutritional Supplements Capsules or powders for complete nutrition and better absorption. Powdered
Nutraceutical Extracts Emerging category of functional compound extracts. Powdered, liquid
Superfood Supplement Enhances smoothies, juices, and protein supplements with nutrients. Powdered, flaked
Nutrition Enhancer in Foods Boosts nutrition in dry foods and baked goods with minimal changes. Powdered
Whole Food Applications Used fresh or dried in soups, salads, snacks, and as a leafy green. Whole dried, fresh, frozen, flaked
Seasonings Adds flavor, color, and nutrition in seasoning blends. Powdered, flaked

Nutritional Supplements

Powdered sea lettuce can be consumed directly in capsule form, or can be processed into a protein or superfood supplement. It can also be added to supplement formulations to provide complete nutrition and aid absorption.


Application Tip: Use as a nutritional supplement in capsule form or add to formulations to provide complete nutrition and aid absorption.

Form Factor: Powdered.

Nutraceutical Extracts

This is an emerging product category that involves creating antioxidant, hydrocolloid (ulvan), protein, and other liquid or powdered extracts of the functional compounds in sea lettuce. The extracts can then be directly added to nutritional supplements or functional foods.

Application Tip: Emerging category involving functional compound extracts.

Form Factor: Powdered, liquid.

Superfood Supplement

Due to its high micronutrient, fiber, and protein levels, sea lettuce can be easily added to smoothies, fresh juices, or protein supplements as a superfood or nutrition enhancer. It’s analogous to spirulina, maca, or other similar superfood enhancers, but with the added benefit of a mild, highly palatable savory flavor that enhances baseline notes well.

Application Tip: Use as a superfood supplement in applications such as juices, smoothies, or protein supplements.

Form Factor: Powdered, flaked.

Nutrition Enhancer in Foods

Sea Lettuce can be incorporated as a nutrition enhancer into processed or packaged foods such as baked goods, chips, crackers, pasta, instant soups, instant noodles, or snack foods. It can be easily incorporated into doughs or batters with minimal change to palatability, texture, or color and also incorporated into seasoning blends for snack foods. The main draw here is its micronutrient content, protein content, and digestibility.

Application Tip: Use as a nutrition enhancer with minimal changes to palatability, texture, or color in dry foods and baked goods.

Form Factor: Powdered.

Whole Food Applications

Sea Lettuce can be used in fresh, frozen, whole dried, or flaked forms as an ingredient in a range of food applications, specifically salads, soups, fried or baked snacks, or as an analog for leafy green vegetables. It has traditionally been added to soups and seaweed salad in Japan and Korea, and also blended with other seaweeds such as nori to make sheets for sushi and as seaweed snacks. In this application, sea lettuce adds a unique texture and flavor that enhances the nutrition and savory flavor of a variety of dishes.

Application Tip: Use as a whole ingredient for making soups, seaweed salad, baked or fried seaweed snacks, and as a leafy green vegetable.

Form Factor: Whole dried, fresh, frozen, flaked.

Seasonings

Sea Lettuce adds a subtle, savory ocean and vegetable flavor to a variety of snacks and fried foods when added as a seasoning. Traditionally, it’s used as a seasoning for fried foods like Takoyaki or Okonomiyaki in Japan, where it is also valued for its bright color to provide contrast. Additionally, it’s used as the base for seasoning blends such as furikake, since it provides bulk, flavor, and nutrition without overwhelming the other ingredients.

Application Tip: Use as a base for seasoning blends to add color, nutrition, and flavor enhancement.

Form Factor: Powdered, flaked.

Growing Trends

Sea Lettuce is gaining traction as an ingredient for the following applications due to its nutritional and flavor profile:

Sea Lettuce is being used for Reason
Protein Supplementation High protein content and complete amino acid profile
Antioxidant Ingredient Presence of vitamin E, polyphenols, and ulvan
Immune Support Presence of vitamin E, polyphenols, and ulvan
Gut Health High levels of prebiotic fiber, ulvan, and some insoluble fiber

Formulation Tips

Formats

Sea Lettuce is typically available in whole dried, flaked, and powdered formats, making it easy to incorporate into a wide range of food and nutraceutical products. Frozen, fermented, and liquid extracts are not available widely.

Dosage

The dosage of sea lettuce varies depending on the intended application but typically ranges from 5 - 10g per serving of final product. It is not recommended to consume more than 25g daily due to the risk of excess iodine consumption.

Tips for Formulation

Sea Lettuce is relatively stable once processed and stored in a cool, dark, and dry environment. The flavor is typically mild and vegetal, with some salty and briny notes, and as such can be easily incorporated into a wide range of taste profiles. No special consideration, such as for kelp, needs to be given in this regard.


Sea Lettuce is typically low in lipids and fat-soluble vitamins. For complete nutrition, pairing with essential fatty acids such as omega-3 is something to keep in mind.

Cultured Supply provides strategic sourcing and product development consulting to support companies in bringing innovative, high-quality algae-based products to market. Feel free to contact us.

Sources