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Syns & Slimming World

How Many Syns in Ham?

By Jenny Updated

Ham is one of the most useful proteins in a Slimming World kitchen, and lean varieties slot neatly into Free Food territory when you trim away visible fat. Wafer-thin ham, in particular, is a brilliant lunchbox staple — folded into salads, layered onto Hi-fi bars for a savoury crunch, or wrapped around asparagus spears for a quick speed-friendly snack. Because it is already cooked, cured and ready to eat, it removes one of the biggest obstacles to staying on plan: faff. When the 4pm slump hits and you are eyeing the biscuit tin, a couple of slices of ham with a pickled gherkin can rescue an entire afternoon.

The catch, as ever, comes down to processing. Honey-roast, maple-glazed, brown sugar and treacle-cured hams all carry added sugars in their coatings, which nudges them out of Free Food and into syn-counted territory. The same applies to breaded ham, smoked varieties with sweet rubs, and the cheaper reformed hams that bulk out the meat with starches, gelatine and sugar. Always check the back of the pack rather than trusting front-of-pack claims like 'natural' or 'traditional' — these are marketing terms, not nutrition ones.

For batch cooking, ham earns its keep in quiche fillings (with fat-free fromage frais instead of cream), in speed-heavy soups like ham and lentil, and shredded through pasta bakes alongside passata and quark. Roasting your own gammon joint at home gives you the cleanest version of all — boil it first to draw out the salt, then finish in the oven with a mustard glaze made from sweetener rather than sugar. Leftovers will see you through three or four lunches and freeze brilliantly. Pair with Speed vegetables to keep your plate balanced and your hunger handled.

Per serving

Ham — syn values

Portion Syns kcal
1 slice wafer-thin ham (10g) 0.5 12
1 slice thick-cut ham (35g) 1.5 45
4 slices wafer-thin (40g) 2 48
2 slices thick-cut (70g) 3 90
100g lean roast ham 4.5 120
1 honey-roast slice (25g) 1.5 35
1 gammon steak (170g, lean, grilled) 7.5 215
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 Ham.

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Ham 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
Tesco Wafer Thin Cooked Ham 1 slice (10g) 0.5 11
Asda Honey Roast Wafer Thin Ham 1 slice (10g) 0.5 13
Sainsbury's British Cooked Ham, Thick Cut 1 slice (35g) 1.5 42
Morrisons Wafer Thin Smoked Ham 4 slices (40g) 2 46
Aldi Ashfields British Cooked Ham 2 slices (50g) 2 58
Marks & Spencer British Honey Roast Ham 2 slices (50g) 3 75
Waitrose Essential British Cooked Ham 1 slice (25g) 1 28
Lidl Deluxe Wiltshire Cured Ham 2 slices (40g) 2 52

Lower-syn alternatives

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

Lean turkey breast slices

Free

Wafer-thin turkey breast is Free on Slimming World and makes a direct swap for ham in sandwiches, salads and wraps. It is slightly leaner than ham and widely available in all supermarkets. Use it wherever you would normally reach for ham, especially if you want to avoid even the small Syn cost of processed varieties.

Chicken breast (cooked and sliced)

Free

Sliced cooked chicken breast is Free and provides a higher protein option for lunchboxes. Roast a batch on Sunday, slice and store in the fridge for the week. It swaps directly for ham in wraps, jacket potato toppings and salads for zero Syns.

Pastrami

0.5-1 Syn per slice

Pastrami is a flavourful deli meat that is similar in Syn value to ham at around 0.5-1 Syn per slice. It brings a peppery, smoky taste that works well in salads and sandwiches. If you are bored of plain ham, pastrami offers variety without significantly increasing your Syn spend.

FAQs

How many syns in ham?

Lean, uncoated ham is Free on Slimming World when all visible fat is trimmed. Wafer-thin ham is typically around 0.5 Syns per 10g slice, and 4 slices (40g) are about 2 Syns. Honey-roast ham is slightly higher at roughly 1.5 Syns per 25g slice due to the sugar glaze. A grilled lean gammon steak (170g) is approximately 7.5 Syns depending on the fat content.

Is ham free on Slimming World?

Lean ham with visible fat removed is Free on Slimming World. This includes plain cooked ham, smoked ham and wafer-thin varieties without sweet coatings. Honey-roast, maple-glazed and treacle-cured hams carry added sugars that push them into synned territory at around 1-1.5 Syns per slice. Always check the label for added sugars and starches.

How many syns in a gammon steak?

A lean grilled gammon steak (170g) is approximately 7.5 Syns on Slimming World, though much of this comes from the fat marbling. Trimming all visible fat before and after cooking reduces the Syn cost. Pair with a poached egg, Free chips and a mountain of Speed salad for a satisfying pub-style meal that stays manageable on plan.

Can you have honey roast ham on Slimming World?

Yes, but honey-roast ham must be synned due to its sugar coating — typically around 1.5 Syns per 25g slice. M&S British Honey Roast Ham is about 3 Syns for 2 slices (50g). If you want the honey-roast taste for fewer Syns, roast your own gammon with a mustard and sweetener glaze instead of sugar.

Lower-syn meat alternatives

Food Portion Syns vs current
Tinned Mackerel In brine or water (100g) FREE same

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