Botanical Glossary

Sea Lettuce

Ulva lactuca

Sea lettuce is a bright green, leafy macroalga resembling garden lettuce, widespread in shallow coastal waters worldwide with ruffled, translucent fronds. Eaten as a nutritious sea vegetable and used in medicinal remedies, it packs vitamins, minerals, and marine vitality. It is valued for its hydrating and barrier protection properties

Sea Lettuce
Sea Lettuce

At a glance

Common name
Sea Lettuce
Latin name
Ulva lactuca
Type
Algae
Ecosystem
Cornwall
Geographic origin
Atlantic
Harvesting season
Summer
Plant parts used
Thalus
Extraction methods
Hot Water ExtractionMacceration
Beneficial chemicals
Ulvan
Secondary benefits
NoursishingAnti-inflammatory
Works well with
Dulse
Aroma profile
Oceanic
Products
Bloom

“It exists in constant exchange, shaped by water, light, and time.”

Benefits

Oceanic Hydrator

Sea lettuce delivers exceptional benefits via polysaccharides (Ulvans), omega acids, vitamins, and minerals. Together these super-hydrate, boost collagen soothe inflammation, brighten tone, and shield against UV/pollution for firm, radiant skin.

Oceanic Hydrator

History

Tidal Nourisher

Sea lettuce nourished ancient coastal peoples in Europe as a vitamin-rich food and poultice for wounds. Modern cosmetics harness its extracts for plumping hyaluronic-like effects, evolving from folk tonic to hydration staple

Tidal Nourisher

Cultivation

Shallow Tide Thriver

Sea lettuce proliferates in nutrient-rich, shallow intertidal zones with good light and currents, on rocks or substrates in temperate-cold seas; it tolerates wide salinities. Sustainable farming uses ropes or tanks in clean coastal waters, harvesting fast-growing fronds year-round for eco-friendly yield.

Shallow Tide Thriver

Harvest & Extraction

Frond Freshness

Bright green fronds are hand-harvested or mechanically cut in clean waters during peak growth, rinsed, then cold-pressed, water-extracted, or filtered to isolate polysaccharides, minerals, and actives into liquid extracts or powders retaining their hydrating, antioxidant potency for skincare.

Frond Freshness
← Back to glossary
Your bag(0)
Your cart is empty
Continue Shopping