Is agar-agar high in histamine?

Histamine status

Safe

Find out whether agar-agar is high or low in histamine, see its exact rating, and check its FODMAP, salicylate, oxalate and diet compatibility all in one place.

Related checkers

Compare agar-agar across criteria

Histamine LiberatorsNo data FODMAPsFit FructansSafe GOSSafe FructoseSafe PolyolsSafe

Sensitivity notes

Why histamine food checker matters

Histamine is a compound naturally present in many foods, especially aged, fermented, or preserved items. In sensitive individuals, excess histamine can cause headaches, flushing, hives, digestive issues, and other symptoms. Your body normally breaks down histamine, but some people have reduced capacity to do so.

Focus on fresh foods - histamine builds up as food ages
Cook and eat meals fresh; avoid leftovers sitting more than 24 hours
Be cautious with fermented foods, aged cheeses, and cured meats

Triggers

HistamineSafe

Histamine Liberators

FODMAPsSafe

FructansSafe

GOSSafe

FructoseSafe

PolyolsSafe

GlutenSafe

LactoseSafe

Dairy ProteinsSafe

NightshadesSafe

SalicylatesSafe

OxalatesSafe

NickelSafe

SulfitesSafe

NitritesSafe

GlutamatesSafe

TyramineSafe

CaffeineSafe

LectinSafe

Low FermentationSafe

Diets

GlutenFit

InflammationFit

VeganFit

VegetarianFit

Paleo AIPFit

MediterraneanFit

DASH DietFit

EoE CompatibleFit

FODMAPsFit

Low FermentationFit

Priority ingredient notes

Serving size, prep, and portion notes for agar-agar

Agar agar is the gelling fibre pulled from red seaweed and sold as E406, and it is one of the very few ingredients in this database that grades clean on every single trigger column: histamine, salicylate, oxalate, nickel, sulfite, glutamate, gluten, lactose, every FODMAP group, lectins and fermentability. That surprises people who avoid seaweed, because whole seaweed is a heavyweight for salicylates and free glutamate. Agar is not whole seaweed. It is a purified galactose polymer, stripped of the compounds that make kombu and nori a problem, and human enzymes cannot break it down at all, so it passes through as inert bulk.

Watch for

It is a bulk laxative before it is anything else. Agar swells to many times its volume in water, which is exactly why a teaspoon sets a whole pan of liquid, and why taking it dry or with too little fluid can lodge in the throat or the bowel. Always dissolve and boil it into the liquid rather than swallowing powder. / Recipe quantities are tiny, usually under one percent of the dish, so the fibre load from a set dessert is small. Trouble tends to come from agar sold as a slimming or constipation supplement, where the dose is far higher. / Low iodine protocols before thyroid scanning generally ask you to drop seaweed derivatives including agar, alginate and carrageenan. Purification is not the same as removal, so follow the protocol rather than reasoning from the ingredient list. / Not a substitute for gelatin one for one. Agar sets firmer and at room temperature, so cooks who swap by weight get a rubbery result and sometimes blame the ingredient for a texture problem rather than a ratio one.

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