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Syns & Slimming World

How Many Syns in Marmite?

By Jenny Updated

Marmite is one of those rare store-cupboard staples that genuinely earns its place on a Slimming World plan, and the good news is that it counts as a Free Food when used in sensible spreading quantities. The famous yeast extract delivers an enormous savoury punch from a tiny scrape, which is precisely why it works so well for slimmers: you get bags of flavour for very few calories, and you simply don't need much to feel satisfied.

A thin layer across hot wholemeal toast, melted into a mug of boiling water for a quick beefy-style broth, or stirred through cooked pasta with a splash of the starchy water can transform an everyday meal into something deeply moreish without nudging your daily syns. Because Marmite is naturally fat-free and packs B vitamins (including added folic acid and B12), it pairs beautifully with Healthy Extra B choices such as wholemeal bread or crumpets, helping you tick that box with genuine enjoyment rather than reluctant chewing.

Cooks on plan also love it as a secret weapon in savoury dishes: a teaspoon whisked into gravy, bolognese, stews, mushroom risotto or roasted root vegetables adds umami depth that mimics rich stocks without the syns you'd rack up using butter, oil or shop-bought reductions. The only watch-out is sodium, so if you're managing blood pressure keep portions modest and skip added salt elsewhere in the recipe.

Flavoured variants such as Marmite with cheese, peanut, or chilli are not automatically Free, so always check the current Slimming World app before tucking in. Stick to the classic black-jar original, spread it thinly, and you have a brilliantly tasty, virtually calorie-free way to liven up everything from breakfast toast to slow-cooked Sunday dinners.

Per serving

Marmite — syn values

Portion Syns kcal
1 tsp (4g) FREE 9
2 tsp (8g) FREE 18
1 tbsp (12g) FREE 27
Thin scrape on toast (3g) FREE 7
Generous spread (15g) FREE 34
Stirred into gravy (5g) FREE 11
Per 100g FREE 226
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 Marmite.

FREE
Marmite on Slimming World
no syns to count — eat to satisfaction

Brand breakdown

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

Brand Product Portion Syns kcal
Marmite Original Yeast Extract 1 tsp (4g) FREE 9
Marmite Reduced Salt Yeast Extract 1 tsp (4g) FREE 9
Marmite Squeezy Yeast Extract 1 tsp (4g) FREE 9
Marmite Dynamite Chilli 1 tsp (4g) FREE 10
Vegemite Original Spread 1 tsp (5g) FREE 9
Tesco Yeast Extract 1 tsp (4g) FREE 9
Sainsbury's Yeast Extract 1 tsp (4g) FREE 8
Meridian Natural Yeast Extract (No Added Salt) 1 tsp (4g) FREE 10

Lower-syn alternatives

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

Bovril

Free

Bovril is also Free on Slimming World and delivers a similar savoury, umami punch. It has a beefier flavour compared to Marmite's yeast character. Both work as Free hot drinks, toast spreads and cooking ingredients, so it comes down to personal taste.

Soy sauce

Free

Light soy sauce is Free on Slimming World and provides a similarly intense savoury, salty flavour. It works in stir-fries, marinades and dressings where Marmite might be too strong. Both are Free umami boosters that add depth without Syns.

FAQs

How many syns in Marmite?

Marmite is Free on Slimming World, so it costs zero Syns regardless of how much you use. A teaspoon at 9 calories, a tablespoon at 27 calories, even a generous 15g spread is all Free. This makes it one of the most plan-friendly spreads and cooking ingredients available.

Is Marmite free on Slimming World?

Yes, Marmite is a Free Food on Slimming World. The original yeast extract, reduced-salt version, squeezy bottle and even the Dynamite Chilli variant are all Free. Supermarket own-brand yeast extracts from Tesco, Sainsbury's and Meridian are also Free. The only watch-out is flavoured variants with cheese or peanut.

Can you have as much Marmite as you want?

Technically yes, Marmite is Free so there is no Syn limit. In practice, the intense salty flavour means a thin scrape or teaspoon is plenty. The main consideration is sodium rather than Syns. A teaspoon in a mug of hot water makes a satisfying Free savoury drink that stops between-meal snacking.

What can you cook with Marmite on Slimming World?

Marmite is brilliant in cooking because it adds deep umami flavour for Free. Stir a teaspoon into gravy, bolognese, stews or risotto for richness without oil or butter. Brush it over roasted vegetables, melt it onto toast with your HExB bread, or dissolve it in hot water as a Free broth-style drink.

Lower-syn spread alternatives

Food Portion Syns vs current
Vegemite 1 tsp (4g) FREE same

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