Recipe + calculator
How to Make Sea Moss Gel
Sea moss gel takes about 15 minutes of work and a day of soaking. Here is the full method, with a calculator that scales the water for any amount of dried moss.
Last updated October 2026. Educational content, not medical advice.
Sea moss gel calculator
Enter how much dried sea moss you have. Results are estimates, so adjust to taste.
- Soak in
- 900 ml
- about 3.8 cups of water
- Blend with fresh water
- 501 ml
- about 2.1 cups
- Approx. gel yield
- 561 ml
- about 2.4 cups
- 2-tablespoon servings
- ~18
- 30 ml each
What you need
- Dried sea moss. Look for a clearly labelled species and origin, and ideally a supplier that publishes heavy-metal test results (see the safety guide).
- Water. Filtered or spring water for soaking and blending.
- A blender and a clean, airtight glass jar.
- Optional: a squeeze of lime or lemon during the soak to reduce the sea smell.
Step-by-step method
1. Inspect and rinse
Dried moss often carries salt, sand, and bits of shell. Rub it between your fingers under cool running water and pick out anything that doesn't look like moss.
2. Soak for 12 to 24 hours
Put the moss in a bowl and cover it with plenty of water (the calculator above gives a minimum). It will swell to two or three times its size and turn soft and translucent. Four hours is the shortest soak that works, but longer soaks give a smoother gel with less smell.
3. Rinse again
Drain the moss, discard the soak water, and rinse well. Check once more for grit. Don't use the soak water in the gel.
4. Blend until completely smooth
Add the soaked moss to the blender with fresh water. Blend one to two minutes until there are no flecks. For a thicker gel use less water, for a pourable gel use more. Start with medium and adjust next time.
5. Chill to set
Pour into a clean jar, seal, and refrigerate. It firms up over two to four hours into a soft, jelly-like gel.
Storage and food safety
- Use a clean, dry spoon every time to avoid introducing bacteria.
- Refrigerate promptly and use within about 2 to 3 weeks.
- To keep it longer, freeze portions in an ice cube tray, then move the cubes to a freezer bag.
- Discard gel that smells sour or off, looks discoloured, or shows any mould.
Ways to use sea moss gel
- Stirred into smoothies (one to two tablespoons is typical).
- Whisked into soups, sauces, and stews as a thickener.
- Mixed into warm tea or oat milk.
- Set into chia puddings or fruit jellies.
Gel has a very mild flavour once the soak and rinse are done, which is why it disappears easily into other foods.
Frequently asked questions
How long does homemade sea moss gel last?
Plan on about 2 to 3 weeks in a clean, sealed jar in the refrigerator. For longer storage, freeze it in ice cube trays and thaw what you need. If it smells sour or off, changes colour, or looks slimy or fuzzy, throw it out.
Why is my sea moss gel runny?
Usually too much blending water, or the moss was under-soaked. Re-blend the gel with a little more soaked moss, or make the next batch with the thick setting in the calculator. Gel also firms up noticeably after a few hours in the fridge.
Why does my gel smell like the ocean?
Some sea smell is normal. A strong fishy or sulphur smell often means the moss wasn't rinsed well enough or came from a heavily wildcrafted batch. Rinse more thoroughly and soak longer, changing the water once.
Do I need to boil sea moss?
No. Most recipes only soak, rinse, and blend. Some people simmer briefly for a smoother, more neutral gel, but it isn't required.
How much sea moss gel should I eat?
Servings of 1 to 2 tablespoons a day are common, but there is no official recommended dose. Iodine content varies a lot between products, so see the safety guide before making it a daily habit.