Syns in Oyster Sauce: Complete Slimming World Guide

Updated on 
9 March, 2026
By Lisa

Is Oyster Sauce High In Syns On Slimming World? - Our Syn Guide

If you are looking to cook up a stir fry for dinner or maybe some teriyaki chicken, you might be curious as to if you need to be synning your oyster sauce and how many syns it has on the slimming world plan.

Is Oyster Sauce High In Syns On Slimming World?

Oyster sauce has on average 0.5 syns a teaspoon, or 1.5 syns for a tablespoon, making it low in syns and a great sauce for adding flavour to dishes.

Down below in our guide, we will take you through how much oyster sauce you can use in the slimming world, some syn values as well as low syn alternatives for making tasty Asian-style dishes.

How Much Oyster Sauce Can I Have On Slimming World?

At 0.5 syns a teaspoon or 1.5 syns for a tablespoon, you can use up to 10 tablespoons of oyster sauce before using up all of your daily syn allowance. Oyster sauce is low in syns thanks to its simple ingredients, being mainly made up of just oyster, water, starch and some sugar.

Oyster is pretty high in sugar, however, having around 9g for 37ml, so we would therefore suggest using this strong sauce in moderation.

Syn Values Of Oyster Sauce

Oyster sauce has a similar syn value no matter the brand, but to help you compare, we've listed a wide range of popular syn values down below.

Syn Values Of Oyster Sauce
  • Blue Dragon Oyster Sauce 150ml - 0.5 syns.
  • Lee Kum Kee Panda Brand Oyster Sauce 510g - 5.5 syns for 100ml.
  • Blue Dragon Oyster & Spring Onion Stir Fry Sauce 120g - 5 syns for 100g.
  • Aldi Asia Specialities Oyster & Spring Onion Stir Fry Sauce 120g - 3 syns.
  • Sharwood's Oyster Sauce 150ml - 2 syns for 37ml.
  • Sainsbury's Oyster Sauce 150ml - 1 syn a tablespoon.
  • Aldi Asia Specialities Oyster & Spring Onion Stir Fry Sauce 120g - 3 syns.
  • M&S Oyster Sauce 150g - 0.5 syns for 10g.
  • Healthy Boy Brand Thick Oyster Sauce 700ml - 0.5 syns.
  • Waitrose Cooks' Ingredients Oyster Sauce 220g - 5 syns for 100g.
  • Maekrua Oyster Sauce 600ml - 0.5 syns.
  • Tiger Tiger Oyster Sauce 700g - 4 syns for 100ml.
  • Lee Kum Kee Gluten Free Panda Brand Oyster Sauce 510g - 5.5 syns.
  • Thai Gold Thai Oyster Sauce 200ml - 0.5 syns.
  • Co-op Oriental Oyster Sauce 155ml - 0.5 syns.

Low Syn Alternatives To Oyster Sauce

If you don't have oyster sauce on hand and you are looking for an alternative or maybe into Asian cooking, it's useful to know the syn values of some other sauces and substitutes for this sauce.

We've listed some popular ones down below to help you out.

  • Kikkoman Soy Sauce 150Ml - 3.5 syns for 100ml.
  • Blue Dragon Fish Sauce 150Ml - 3.5 syns for 100ml.
  • Kikkoman Tamari Gluten Free Soy Sauce 250Ml - 3 syns.
  • Tesco Hoisin Dipping Sauce 290G - 2 syns for 30g.
  • Blue Dragon Sweet Chilli Dipping Sauce 190Ml - 6 syns for 50ml.
  • Blue Dragon Hoi Sin Dipping Sauce 190Ml - 7 syns for 50ml.
  • Amoy Light Soy Sauce 150Ml - 2.5 syns for 100ml.
  • Amoy Dark Soy Sauce 150Ml - 6 syns for 100ml.
  • Blue Dragon Reduced Sugar Sweet Chilli Sauce 190Ml - 7 syns for 100ml.
  • Blue Dragon Sweet Teriyaki Sauce 190Ml - 8.5 syns for 50ml.
  • Blue Dragon Black Bean Stir Fry Sauce 120G - 6 syns for 100g.
  • Blue Dragon Teriyaki Stir Fry Sauce 120G - 6 syns for 100g.
  • Tesco Dark Soy Sauce 150Ml - 1 syn.
  • Tesco Light Soy Sauce 150Ml - 0.5 syns a tablespoon.
  • Sharwoods Hoisin Marinade Sauce 290G - 6 syns.
Low Syn Alternatives To Oyster Sauce

Final Words

Overall, Oyster sauce is very low in syns, having just 0.5 syns a teaspoon and between 1-1.5 syns for a tablespoon, making it an excellent choice for flavouring Asian dishes like marinades and stir fry, it is high in sugar however, so we would suggest using it in moderation as with other low syn alternatives above.

Frequently Asked Questions

How are syn values calculated?

Syn values are calculated using a formula based on calories, saturated fat and sugar content per serving. They’re not the same as calories — a product can be low in calories but higher in syns if it’s high in sugar or fat. Always check the official Slimming World app for the most accurate and up-to-date syn values.

Do syn values change?

Yes. When manufacturers reformulate their products, the syn value can go up or down. This is why we recommend double-checking with the Slimming World app or your consultant, especially if a product’s packaging has changed recently.

How many syns should I have per day?

Most Slimming World members work with 5 to 15 syns per day. Your consultant will advise on the right amount for you. The key is to use your syns on the things you enjoy most — whether that’s a chocolate bar, a glass of wine, or a packet of crisps.

Lisa
I'm a Senior Web developer with over 3 years of experience. Solution-driven Website Developer finding solutions and determining customer satisfaction. Proven experience developing consumer-focused websites using HTML, CSS, PHP and JavaScript.
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