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Syns & Slimming World

How Many Syns in Oatibix?

By Jenny Updated

Oatibix is Weetabix Limited's whole-grain oat answer to the classic wheat biscuit, and it has earned a devoted following amongst Slimming World members thanks to its generous Healthy Extra B allowance. Two biscuits, weighing roughly 45g, count as your full HEB B portion and contribute zero syns, making them one of the most filling breakfast options available within the plan. The biscuits are made almost entirely from whole-grain oats, which deliver slow-release energy and a respectable hit of soluble beta-glucan fibre — the same compound credited with helping to lower cholesterol when eaten regularly.

What makes Oatibix particularly attractive on SW is the texture. Unlike porridge, which can feel sloppy on a chilly morning, or muesli, which often hides added sugars and oils, Oatibix biscuits hold their shape briefly before softening into a warm, comforting mass when milk is poured over them. Pair them with skimmed milk from your Healthy Extra A allowance, then pile on a Speed fruit Free Food such as raspberries, strawberries or sliced banana, and you have a breakfast that feels indulgent yet sits comfortably within the eating plan. Many members add a sprinkle of cinnamon or a few drops of vanilla extract to lift the flavour without adding syns.

The biscuits also work brilliantly as a crumbled topping for stewed apples or rhubarb, transforming a simple fruit compote into something resembling a crumble pudding. Crushed Oatibix can even stand in for breadcrumbs when coating chicken goujons in the oven, although doing so usually shifts them outside the HEB portion and incurs syns. Beyond two biscuits, every additional 22g portion costs roughly 2.5 syns, so it pays to weigh carefully rather than eyeballing the bowl, particularly on hungrier mornings when the temptation to add a third biscuit is strong.

Per serving

Oatibix — syn values

Portion Syns kcal
2 biscuits (45g) HEB portion 0 175
1 biscuit (22.5g) 2 88
3 biscuits (67.5g) 5 260
4 biscuits (90g) 7 350
Half portion (1 biscuit + milk) 2 88
Crushed topping (15g) 3 58
Syn values are based on Slimming World 2026 guidance. Always double-check with your group or app.

Numbers at a glance

Quick auto-calculated stats for Oatibix.

0.0syns / 100g
Syns per 100g
useful for comparing brands
6
portion sizes covered
from snack to full serving
7syns
saved by using as HEx
per day, if used as your daily Healthy Extra
0syns
cheapest portionat 2 biscuits (45g) HEB portion
smallest serving

Brand breakdown

Popular supermarket and branded products, with the portion-level syn count.

Brand Product Portion Syns kcal
Weetabix Oatibix Original (2 biscuits, 45g) 45g HEB 0 175
Weetabix Oatibix Original (3 biscuits, 67.5g) 67.5g 5 260
Weetabix Oatibix Bitesize 40g 7 150
Weetabix Oatibix Flakes 30g 5 110
Weetabix Oatibix Bitesize Raisin 40g 8 156
Weetabix Oatibix Crispy Fruit 40g 8 152

Lower-syn alternatives

Swaps that keep the feel of the original without the syn hit.

Weetabix

Free as HExB (2 biscuits)

Two Weetabix biscuits are also a Healthy Extra B choice at zero syns, offering a wheat-based alternative with a slightly different texture. They are widely available, quick to prepare, and pair equally well with berries and skimmed milk for a filling breakfast.

Porridge oats

Free as HExB (40g)

Porridge oats at 40g deliver a warm, comforting oat breakfast as your HExB for zero syns. They take slightly longer to prepare than Oatibix but keep you fuller for longer and are more versatile for overnight oats, pancakes and baking.

FAQs

How many syns in Oatibix?

Two Oatibix biscuits (45g) are 0 syns when used as your Healthy Extra B on Slimming World. A single biscuit outside HExB is around 2 syns, and three biscuits cost approximately 5 syns. Oatibix Bitesize and Flakes variants carry higher syns at 7 and 5 syns per 40g and 30g respectively, so stick with the original biscuits for the best value.

Is Oatibix free on Slimming World?

Oatibix is free when eaten as your Healthy Extra B at two biscuits (45g). Beyond that allowance, each additional biscuit costs roughly 2 syns. It is not an unlimited Free Food, so weighing matters if you are tempted to add a third biscuit. The HExB portion is generous enough for a filling breakfast when paired with milk and Speed fruit.

How many Oatibix can I have as a Healthy Extra B?

You can have two Oatibix biscuits (45g) as one Healthy Extra B choice on Slimming World, costing 0 syns. If you eat three, the extra biscuit adds approximately 5 syns to your day (the whole portion is counted outside HExB). Four biscuits would be 7 syns. Pair your two HExB biscuits with skimmed milk and berries for a properly filling breakfast.

Can you use Oatibix as a crumble topping on Slimming World?

Yes, crushed Oatibix makes a lovely crumble topping over stewed fruit. However, using it this way typically means it falls outside your HExB portion, so you will need to count the syns. A 15g crushed topping costs around 3 syns. If you use your full HExB allowance of 45g crumbled over fruit, that portion remains syn-free.

Lower-syn cereal alternatives

No lower-syn cereal alternatives in our index — Oatibix is already at the lower end. Browse the full cereal list →

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