How Many Calories in Bosou?

Bosou is a traditional Kadazan-Dusun fermented condiment made from raw fish or meat, cooked rice, and pangi seed, eaten in small spoonfuls alongside plain rice.

35kcal / 2 tbsp condiment portion

Two tablespoons of bosou (about 30g) comes in at roughly 35 calories, with 3g protein, 4g carbs, and 1g fat. It is a condiment, not a main dish, so you are realistically eating a tiny spoonful or two with your rice, which means the calorie hit is almost nothing. The fermented fish and lacto-fermented rice do most of the nutritional work here, with pangi seed and salt adding almost zilch in calories.

Nutrition facts

Per 2 tbsp condiment portion (30g)	Amount	Per 100g
Calories	35 kcal	117 kcal
Protein	3 g	10 g
Carbs	4 g	13 g
Fat	1 g	3 g

Where the calories come from

Fermented freshwater fish (40% of batch)12g

14 kcal

Fermented cooked rice (56% of batch, carbs reduced by lacto-fermentation)17g

19 kcal

Pangi seed and salt1g

2 kcal

The real talk

Bosou is a Kadazan-Dusun preserved food from Sabah, and if you have never heard of it, think of it as the Borneo answer to budu or belacan, except way more intense. Raw freshwater fish (or wild boar meat) gets mixed with cooked rice and pangi seed, then left to ferment for days or weeks until it turns sour and pungent. You eat it in small amounts with plain white rice, not as a main dish. The calories are almost laughably low at around 35 per 2-tablespoon serving, and that is honestly the right way to eat it anyway because the flavour is strong enough that nobody is piling on three ladles. Worth flagging: the wild boar and pork variants (bosou daging) are non-halal. These numbers are a ballpark estimate since hard nutritional data for bosou is basically nonexistent, so treat the figures as a reasonable educated guess rather than lab-tested gospel.

What actually changes the calories here is mostly the protein source and how much you eat. Bosou ikan (fish version) sits at about 35 calories per 30g serving because freshwater fish is lean. Swap to bosou daging with wild boar or pork, and you are looking at closer to 50 calories for the same 30g because red meat carries more fat. The bambangan variant (wild mango added to the fish bosou) lands around 40 calories, just slightly higher from the fruit sugars. None of these numbers are scary for a dieter, honestly. The real calorie impact comes from whatever rice you eat bosou with, not the bosou itself. A 200g bowl of white rice is 260 calories. Your two tablespoons of bosou next to it is 35 calories. You do the maths lah.

Bosou variants, ranked by calories

Variant	Calories	Notes
Bosou ikan (freshwater fish)	35 kcal	Standard version; lean freshwater fish like tilapia or pelian; lowest fat of the variants
Bosou daging (wild boar / pork)	50 kcal	Wild boar or farmed pork replaces fish; higher fat content from red meat raises calories ~40%
Bosou with bambangan (fruit variant)	40 kcal	Bambangan (wild mango) added to bosou ikan; adds natural fruit sugars, slightly higher carbs

How to eat it lighter

Stick to the fish version (bosou ikan) over the meat version to keep it at 35 calories instead of 50 per serving.
Treat it as a condiment, not a side dish. Two tablespoons is the traditional portion and more than enough given how strong the flavour is.
Pair it with cauliflower rice or a smaller rice portion if you are actively cutting, since the bosou itself is not the calorie problem.
Go heavy on plain blanched vegetables alongside it. Sayur manis or kangkung with bosou and rice is a genuinely filling, low-calorie plate.
Avoid versions where extra oil or coconut milk has been stirred in during preparation, which some modern takes do to mellow the sourness.

Common questions

How many calories in Bosou?

A standard 2-tablespoon (30g) serving of bosou has around 35 calories, with 3g protein, 4g carbs, and 1g fat. The daging (meat) version runs closer to 50 calories per serving due to higher fat from pork or wild boar.

What exactly is bosou and how is it eaten?

Bosou is a traditional Kadazan-Dusun fermented food from Sabah made by mixing raw freshwater fish or meat with cooked rice and pangi seed, then fermenting the mixture for several days to weeks. It develops a sour, funky flavour similar to very strong budu. You eat it in small spoonfuls alongside plain white rice, not as a standalone dish. The wild boar and pork versions are non-halal.

Is bosou healthy or good for weight loss?

For a dieter, bosou is basically a non-issue calorie-wise at 35 calories per serving. It also delivers 3g of protein from the fermented fish. Fermented foods carry probiotic benefits from the lacto-fermentation process. The main thing to watch is sodium since it is preserved with salt, but if you are counting calories, the bosou is not your problem. Your rice portion is.

Calorie and macro figures are estimates for a typical hawker or kopitiam serving. Actual numbers vary by stall, recipe and portion size. Use them as a guide, not gospel.

New to all this? Read how I went from 128kg to 86kg without cutting rice →