Can a vegan eat jay food?

Mostly, yes, because jay excludes meat, egg, dairy and honey. But jay places are not all equally strict, so ask about ingredients and seasonings every time.

Is it enough to tell a made-to-order stall "no meat"?

No. The cook may leave out the pork or chicken but still add fish sauce or oyster sauce. Name the seasonings too: no fish sauce, no oyster sauce, use light soy sauce instead.

Why does jay food leave out garlic?

By the beliefs behind jay, five pungent vegetables, such as garlic, onions and garlic chives, are avoided. That is a matter of belief, not nutrition. Vegetarians and vegans do not have to avoid them.

Jay, vegetarian and vegan in Thailand: what differs, and how to order safely

Jay, vegetarian and vegan are not the same. Jay (เจ) excludes meat, every animal product, pungent vegetables and intoxicants. Vegetarian, mangsawirat (มังสวิรัติ) in Thai, excludes meat, but many vegetarians still eat egg and dairy. Vegan excludes everything from animals but does not exclude garlic or onion. Whichever you follow, the big trap in Thai food is the animal products hidden in seasonings: fish sauce, oyster sauce and shrimp paste.

Three diets, three different lists; tell the cook what you don't eat

How jay, vegetarian and vegan differ

	Jay	Vegetarian	Vegan
Meat, seafood	no	no	no
Egg	no	depends; many eat it	no
Milk, butter, cheese, yogurt	no	depends; many eat it	no
Honey	no	depends	no
Fish sauce, oyster sauce	no	no	no
Garlic, onion, garlic chives	no	yes	yes
Alcohol, intoxicants	avoided	not specified	not specified

Jay comes from a Chinese tradition: no “fishy” fresh animal food, plant food only, and no cooking with five pungent vegetables. The lists in Thai media include garlic, all kinds of onion, garlic chives, Chinese garlic (lak kiao) and tobacco leaf; some sources count them slightly differently. The jay festival runs from the 1st to the 9th day of the 9th Chinese lunar month; in 2026 that was 10-18 October. Many jay places sell all year round.

Mangsawirat joins mangsa (meat) and wirat (abstaining): giving up meat. Thai vegetarians differ in how strict they are; some eat egg and dairy, some do not.

Vegan, as defined by The Vegan Society, means dispensing with all products derived wholly or partly from animals, which includes honey.

Because “vegetarian” is so broad, list what you do not eat when you order rather than just saying you are vegetarian.

The yellow flag with red letters

Places that serve jay food usually put up a yellow flag or sign with the red character 齋 (read jai or jay). Yellow stands for Buddhism or people keeping precepts, red for good luck, and the character means “free of animal food”. During the jay festival, many ordinary places put up the flag and add jay dishes.

The flag tells you a place has jay food. It does not tell you every dish there is jay. A place that sells both may share woks and pots. If that matters to you, ask whether they use separate ones.

Animal products hidden in Thai food

Hidden in	Animal product	Ask or request
almost every stir-fry	fish sauce, oyster sauce	no fish sauce, no oyster sauce, light soy sauce instead
green curry, red curry, gaeng som	shrimp paste in the curry paste	does the curry paste have shrimp paste?
som tam, yam salads, chili dips	dried shrimp, shrimp paste, pla ra, fish sauce	no dried shrimp, no pla ra, no fish sauce
noodle soup, clear soups	broth simmered from bones	what is the broth made from?
stir-fries, fried food, some sweets	lard, pork crackling	what oil do you use?
fried rice, pad thai, egg noodles, battered food	egg	no egg; do the noodles have egg?
Thai iced tea, iced coffee	condensed or fresh milk	no milk

Jay kitchens use plant-based seasonings instead, such as light soy sauce and kapi jay, a shrimp-paste substitute made for jay cooking. Protein comes from tofu, tofu skin, beans and textured soy protein.

“No meat” alone is not enough. Name the seasonings too, because fish sauce and oyster sauce go into almost every stir-fry.

Phrases to order with

“Gin jay” (I eat jay), or “gin mangsawirat, mai gin neua sat, mai gin khai, mai gin nom” (vegetarian, no meat, no egg, no milk): list it out
“Mai sai nam pla, mai sai sauce hoy nang rom, chai si-iw khao taen dai mai?” (No fish sauce, no oyster sauce; can you use light soy sauce instead?)
“Prik gaeng mee kapi mai?” (Does the curry paste have shrimp paste?)
“Nam sup tam jak arai?” (What is the broth made from?)
“Chai kratha yaek mai?” (Do you use a separate wok?) if equipment matters to you

If you do not speak Thai, keep these on your phone and show the cook. That is clearer than shouting over a hot wok.

Example: a vegan ordering at a non-jay made-to-order stall

No jay place nearby, so you order at an ordinary made-to-order stall. You want stir-fried vegetables and an omelette.

Step	Ask or check	Answer	Decision
1	What goes in the mixed vegetable stir-fry?	vegetables, garlic, oyster sauce, fish sauce	ask for no oyster sauce or fish sauce, light soy sauce instead
2	The omelette	egg	drop it; vegans do not eat egg
3	What instead?	the stall has tofu	order stir-fried tofu with vegetables, seasoned with light soy sauce
4	The oil	vegetable oil	fine
5	Final order	two dishes, one rice	“phat phak ruam, kap tao hu phat, mai sai nam pla, mai sai sauce hoy nang rom, chai si-iw khao”

Four questions, one dish dropped, one swapped in, and a meal you can actually eat. If the stall is too busy to answer, or says the sauce is premixed and cannot be changed, trying another place is easier.

Eating jay for days: watch the salt and oil

Many jay dishes are fried and seasoned strongly to stand in for meat. A Thai PBS summary drawing on the Department of Health and nutrition bodies advises no more than 2,000 mg of sodium a day, equal to 1 teaspoon (5 g) of salt. The main sodium sources in jay food are light soy sauce, seasoning sauce and kapi jay.

Take textured soy protein, made from defatted soy flour: about 50% protein and 366 kcal per 100 g.

100 g × 50% = about 50 g of protein, 366 kcal
150 g × 50% = about 75 g of protein, about 549 kcal

The same source suggests no more than 100-150 g a day, and because it is high in phosphorus, it may not suit people with kidney disease. If you have a health condition, talk to a doctor or dietitian before changing how you eat.

To get the most from jay food, choose fresh vegetables and boiled or steamed tofu over fried dishes, and taste before adding soy sauce.

Common mistakes

Saying only “vegetarian”. People understand it differently. List what you do not eat.
Seeing a yellow flag and assuming every dish is jay. Places that sell both have regular dishes too.
Forgetting the broth. A vegetable-only noodle soup in pork bone broth is not vegetarian.
Forgetting the curry paste. A vegetable curry can still carry shrimp paste.
Assuming jay food is always healthy. Fried and very salty food is still fried and salty.

Summary

Jay excludes meat, animal products, pungent vegetables and intoxicants. Vegetarians exclude meat, with different degrees of strictness. Vegans exclude everything from animals. The yellow flag helps you find a place, but anywhere else you have to ask about fish sauce, oyster sauce, shrimp paste and the broth yourself. The next article in this series covers halal food.

Sources

Ingredients and heat vary by kitchen and recipe. If you have a food allergy, ask before you order, every time.