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Fibre: the nutrient Singapore is short of, and where it actually hides

Fibre is the nutrient nobody argues about and almost nobody gets enough of. The Health Promotion Board recommends about 20 g of fibre a day for women and 26 g for men. The average Singaporean eats about 13 g a day — barely half of what is recommended, in a food environment built on white rice, refined noodles and not nearly enough vegetables and wholegrains. Unlike protein, where most people already meet the target, fibre is the one nutrient where the gap is the story: the useful question is not whether fibre is good for you, but where to find the missing 7 to 13 grams without overhauling your diet.

What fibre is, and the two kinds that matter

Dietary fibre is the part of plant foods your body cannot digest. It passes through the stomach and intestines largely intact, and what it does depends on which kind it is:

Soluble fibre dissolves in water and forms a gel. It is found in oats, barley, legumes, some fruits and vegetables, and seeds. It slows digestion, blunts blood-sugar rises after a meal, and can lower blood cholesterol — the mechanism behind the approved health claim that oat beta-glucan helps lower cholesterol.
Insoluble fibre does not dissolve. It is found in wholegrains, wheat bran, vegetables and the skins of fruit. It adds bulk to stool, speeds transit through the gut and helps keep bowel movements regular.

Most plant foods contain both, in different proportions. A third category is increasingly talked about: fermentable fibre, including resistant starch and inulin, which gut bacteria ferment into short-chain fatty acids. These are sometimes called prebiotics, because they feed the gut microbiome — which is also the subject of the fermented foods guide. You do not need to track the three categories separately; a varied diet of whole plant foods covers all of them. What matters is the total, and the total is what Singapore is short of.

How much fibre you need

Source	Recommended fibre per day
Health Promotion Board (Singapore)	About 20 g for women and 26 g for men — roughly 10 g per 1,000 kcal eaten.
World Health Organization (2023)	At least 25 g a day of naturally occurring fibre, with no harmful effects identified at that level.
Reynolds & Mann, The Lancet 2019 (WHO-commissioned)	25–29 g a day captured most of the benefit in the pooled evidence; higher intakes up to about 30 g showed further, smaller gains.
Average Singaporean	About 13 g a day — roughly half the HPB recommendation.

The evidence behind those numbers is unusually strong for nutrition. The Reynolds and Mann reviews, commissioned by the WHO and published in The Lancet in 2019, pooled 185 observational studies covering 135 million person-years alongside 58 clinical trials. Higher fibre intakes were associated with lower all-cause mortality and lower risk of coronary heart disease, stroke, type 2 diabetes and colorectal cancer, with the biggest gains coming from moving out of the lowest intakes — which is exactly where the average Singaporean sits. The practical message is the opposite of the protein story: for fibre, the first few grams you add are worth the most.

Fibre per 100 g: where it actually hides

Typical values from food-composition data (USDA FoodData Central and HPB sources). Check the pack you buy — brands vary, and the fibre line is the one to compare.

Food	Fibre per 100 g	Notes
Lentils, cooked	8 g	Also about 9 g of protein per 100 g. Dry lentils are far higher per 100 g, but you eat them cooked.
Chickpeas, cooked	7–8 g	Similar to lentils; hummus keeps most of it.
Oats, rolled	10 g	The soluble-fibre source behind the oat beta-glucan cholesterol claim.
Wholemeal bread	6–7 g	Compare with white bread at about 2–3 g per 100 g.
Chia seeds	34 g	Very high per 100 g, but a serving is a tablespoon or two, not 100 g.
Brown rice, cooked	About 3.5 g per cup	White rice is about 0.6 g per cup — the swap alone adds about 3 g per cup.
Broccoli, cooked	About 3 g	Most vegetables sit around 2–4 g per 100 g.
Banana	About 2.6 g	One medium banana gives about 3 g.
Apple, with skin	About 2.4 g	Most of the fibre is in the skin — peeling it removes much of the benefit.
Digestive biscuit	3.6 g	Enough to be a "source of fibre" (see below), not enough to be "high fibre" — and it comes with sugar and palm oil.

The pattern in this table is the whole guide in miniature: legumes and oats are the dense sources, wholegrains beat refined grains by a factor of two or three, fruit and vegetables contribute a few grams each and add up across the day, and a biscuit that advertises fibre is still a biscuit.

What "source of fibre" and "high fibre" legally mean

These are regulated claims, not marketing words. Under the Health Promotion Board's Guide to Nutrition Labelling, which Singapore's Food Regulations follow:

Claim on the pack	What the product must meet
"Source of dietary fibre" (also "contains fibre")	At least 3 g per 100 g, or 1.5 g per 100 kcal, or 3 g per 100 ml.
"High in dietary fibre" (also "high source", "good source", "fibre-rich")	At least 6 g per 100 g, or 3 g per 100 kcal, or 4 g per serving.
"More / increased / added fibre"	At least 25% more fibre than the reference food, with a statement comparing the two.

The digestive biscuit in the table above shows why the distinction matters: at 3.6 g per 100 g it scrapes past the "source of fibre" bar and falls well short of "high fibre". A product that says "high fibre" on the front must meet the 6 g bar; a product that says only "source of fibre" has met the lower one. And a product can meet either bar while still being high in sugar, fat or salt — the fibre claim is about fibre alone.

One more regulated word: "wholegrain". Singapore's Food Regulations do not let a product simply say "wholegrain" — the word has to be immediately qualified by the percentage of wholegrain ingredients used. HPB counts four whole-wheat crackers as one serving of wholegrain; a biscuit that is 16% wholemeal is not in the same category. Check the percentage, not the word.

Added and isolated fibre: what it is and what it is not

Fibre can be added during manufacturing — inulin and chicory root fibre, polydextrose, resistant starch, oat fibre — and a product fortified this way can legitimately carry a "high fibre" claim. These isolated fibres may have some of the effects of fibre naturally present in food, but their long-term benefits are not yet known, and the Health Promotion Board's advice is to get fibre from whole foods such as fruits, vegetables, wholegrains and legumes as much as possible. A high-fibre biscuit is still a biscuit: the added fibre does not cancel the sugar and fat that come with it, and it does not bring the vitamins, minerals and plant compounds that whole foods carry alongside their fibre.

Fibre supplements — psyllium husk and similar — have a place for people who need a concentrated dose, including for constipation, and psyllium is one of the better-studied options. But they are a top-up for a diet that is short, not a substitute for the diet itself, and they work best with enough water. This page is about food; a supplement decision belongs with a doctor or dietitian.

How to close the gap

The average Singaporean needs about 7 g more a day (women) or 13 g more (men). That sounds like a lot until it is broken into swaps:

Swap white rice for brown rice. One cup of cooked brown rice has about 3.5 g of fibre against about 0.6 g for white — roughly 3 g gained per cup, for the same meal.
Swap white bread for wholemeal. About 6–7 g per 100 g against 2–3 g — roughly double the fibre for the same sandwich.
Add a serving of legumes. A cup of cooked lentils or chickpeas adds about 15–16 g — more than the entire daily gap for most people, in one dish.
Eat fruit instead of drinking it. A whole apple gives about 2.4 g of fibre; a glass of apple juice gives almost none, and adds sugar instead.
Start the day with oats. A bowl of rolled oats gives about 4 g of fibre before the day has properly started.

Two cautions. First, increase gradually and drink water with it — jumping from 13 g to 30 g overnight commonly causes bloating and gas, and fibre needs water to do its work. Second, do not let the fibre claim do the choosing: a "high fibre" cereal that is also high in sugar is a worse choice than plain oats, and a "high fibre" biscuit is a worse choice than an apple.

Label traps

"High fibre" on a sugary product. The claim is about fibre alone. A high-fibre breakfast cereal can still be high in sugar, and a high-fibre biscuit is still a biscuit. Read the sugar line next to the fibre line.
Fibre per serving vs per 100 g. A product can claim "high fibre" at 4 g per serving while the serving is small. Compare products on the per-100 g column, and work out what the serving you actually eat gives you.
"Wholegrain" without a percentage. The word must be qualified by the percentage of wholegrain ingredients. A product that is 16% wholemeal is mostly refined flour with a wholegrain label.
Added fibre as a halo. Inulin or chicory root fibre added to a processed food lets it carry a fibre claim without the whole-food package — the vitamins, minerals and plant compounds that come with fibre in fruit, vegetables, legumes and wholegrains.
Fruit juice as a fibre source. Juice has almost no fibre, however much fruit went into it. The fibre stays in the pulp that was strained out.

Practical checks

Three checks, in order:

Count the gap, not the claim. You need about 20 g (women) or 26 g (men) a day, and the average is about 13 g. The question is not whether a product is "high fibre" but whether your day adds up — and one legume dish or one rice swap closes most of the gap.
Compare fibre per 100 g. The per-100 g column is for comparing products; the per-serving column is for planning your day. A product at 6 g per 100 g is genuinely high fibre; a product at 3.6 g per 100 g is a source of fibre and nothing more.
Check what the fibre comes with. Sugar, fat and sodium per 100 g. The best fibre sources on this site's pages are the ones that deliver the grams with the least of everything else — lentils, chickpeas, oats, wholemeal bread, vegetables and fruit — not the ones with the loudest claim on the front.

Pages where these checks are most useful: oats and instant oatmeal, muesli and granola, rice, sandwich bread, cornflakes, other breakfast cereals, dried lentils and chickpeas, canned beans and legumes, canned baked beans, dried fruit, mixed nuts, popcorn, biscuits and cookies, cream crackers and crispbread and breadsticks, plus the sugar and salt guide and the protein guide.

What this page is not

Not medical advice. If you have irritable bowel syndrome, diverticular disease, or any gut condition, increasing fibre — and which kinds — should be discussed with your doctor or dietitian, not decided from a shopping guide.
Not a ranking. There is no score here and no list ordered best to worst. Fibre per 100 g is a fact about a food, not a verdict on it.
Not a complete list of fibre sources. It covers the targets, the claims, and the foods that close the gap. A product you meet that is not here has not been judged — it has not been covered yet. No specific prices are quoted anywhere on this page, because prices vary by shop and week.