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Mars Hi Protein Low Sugar Bar
🍫 18g of protein per 55g bar — the iconic Mars taste in a high-protein, low-sugar format
🚫 Only 1.7g of sugar per bar (Mars) / 2g (Salted Caramel) — sweetened with maltitol
⚡ 189 kcal (Mars) / 196 kcal (Salted Caramel) — no added sugar
🧂 Salted Caramel: genuine salt-sweet contrast with real salted caramel layer
🍫🧂 2 flavours: Mars + Salted Caramel — individually or box of 12
Mars
Genuine Product of Mars
What is the Mars Hi Protein Low Sugar Bar?
The Mars Hi Protein Low Sugar Bar is the most nutritionally precise product in the Protein by Mars range — a 55g bar delivering 18g of protein at just 189 to 196 kcal, with only 1.7 to 2g of sugar. It is the high-protein, low-sugar version of the iconic Mars bar: the same chocolate-and-caramel format, but with the protein dramatically elevated and the sugar reduced by over 90% compared to the original.
Two flavours are stocked. The Mars variant replicates the classic Mars bar profile: milk chocolate coating with sweetener (maltitol-based), a protein matrix delivering 18g per bar, and a caramel-flavoured layer with collagen hydrolysate and oligofructose for fibre and texture. The Salted Caramel variant adds a distinct salted caramel flavoured layer — sweetened condensed milk, cocoa butter, salt and natural caramel colouring — for a sweeter and saltier dimension that reinterprets the classic Mars format with a contemporary flavour.
Both variants are sweetened exclusively with maltitol (a sugar alcohol) and contain no added sugar in the traditional sense — the 1.7 to 2g of sugar per bar comes entirely from naturally occurring sugars in the milk-based ingredients.
Not suitable for vegetarians (contains collagen hydrolysate from bovine collagen). Not suitable for vegans.
The Mars bar you love. 18g of protein. Under 2g of sugar. Every time.
| Flavour | Salted Caramel or Mars |
| Packaging | 1 Pc or 12 Pcs |
| Brand | Mars |
| Size | 57 gr |
🍫 18g of protein — maximum protein efficiency in a genuine Mars format
At 18g of protein per 55g bar, the Mars Hi Protein Low Sugar Bar provides the highest protein-to-format ratio alongside the Bounty in the Mars Hi Protein range. The protein comes from milk protein (caseinate and whey fractions) and collagen hydrolysate — a multi-source matrix that provides both fast and sustained amino acid availability alongside the connective tissue amino acids of bovine collagen.
🚫 Under 2g of sugar — genuine low-sugar confectionery
The original Mars bar contains approximately 33g of sugar per 51g serving. The Mars Hi Protein Low Sugar Bar contains 1.7g of sugar per 55g bar — a reduction of over 95%. The sweetness comes entirely from maltitol, delivering the same sweetness perception as sucrose at a fraction of the glycaemic impact.
🧂 Salted Caramel — a genuinely modern flavour interpretation
The Salted Caramel variant uses a dedicated salted caramel flavoured layer (16% of the bar) — sweetened condensed milk, cocoa butter, sea salt, caramel colour and natural flavouring — creating a genuine salt-sweet contrast in every bite. For consumers who appreciate the contemporary salted caramel flavour dimension, this variant offers a distinctly more complex eating experience than the standard Mars flavour.
🌿 Oligofructose for prebiotic fibre and texture
Both variants include oligofructose — a naturally occurring prebiotic fructooligosaccharide that contributes to the bar's texture and provides a meaningful dietary fibre contribution, supporting gut microbiome health.
🎯 Goal guide
🏋️ Mass gain: 1 to 2 bars/day post-workout or between meals. 18g of protein at under 200 kcal — the most calorie-efficient protein bar in the Mars Hi Protein range.
🔥 Weight loss / cutting: 1 bar/day. Under 2g of sugar and under 200 kcal — the ideal dessert substitute for strict low-sugar dietary phases.
⚖️ Body recomposition: 1 bar/day post-workout. Maximum protein delivery at minimum caloric and glycaemic cost.
Serving suggestion
Open the wrapper and consume directly. No preparation required. Store in a cool, dry place away from direct sunlight. Best consumed as a post-workout snack, between meals, or as a low-sugar dessert substitute.
Best times to enjoy it
🏋️ Post-workout
18g of protein within 30 to 45 minutes of training. The chocolate-caramel format is particularly effective post-workout when appetite is suppressed but a genuinely enjoyable protein source is needed.
🚫 Replacing conventional confectionery at any time of day
At under 2g of sugar per bar, the Mars Hi Protein Low Sugar Bar can genuinely replace a conventional confectionery bar without any meaningful glycaemic impact — ideal for individuals managing blood glucose or following low-carbohydrate dietary approaches.
🌙 Evening low-sugar dessert
The Salted Caramel variant is particularly satisfying as an evening sweet craving solution — the salt-sweet contrast and genuine chocolate coating deliver a high-indulgence eating experience at under 200 kcal and 2g of sugar.
✈️ On the go
Individually wrapped and shelf-stable at room temperature — no preparation, no refrigeration required.
Full ingredient list by flavour
🍫 Mars:
Milk chocolate with sweetener (21%) (sweetener (maltitol), cocoa butter, whole milk powder, cocoa mass, emulsifier (soya lecithin), vanilla extract), milk protein, caramel-flavoured coating (15%) (sweetener (maltitol), condensed milk, cocoa butter, humectant (sorbitol), emulsifier (oligofructose, mono- and diglycerides of fatty acids), palm fat, natural flavouring, colour (plain caramel)), collagen hydrolysate, humectant (glycerol), oligofructose, palm fat, barley malt extract, fat-reduced cocoa powder, natural flavouring. May contain nuts, eggs and peanuts.
🧂 Salted Caramel:
Milk chocolate with sweetener (23%) (sweetener (maltitol), cocoa butter, whole milk powder, cocoa mass, emulsifier (soya lecithin), vanilla extract), milk protein, salted caramel flavoured layer (16%) (sweetener (maltitol), condensed milk, cocoa butter, salt, humectant (sorbitol), emulsifier (mono- and diglycerides of fatty acids), natural flavouring, colour (plain caramel)), collagen hydrolysate, humectant (glycerol), oligofructose, palm fat, barley malt extract, fat-reduced cocoa powder, natural flavouring. May contain nuts, eggs and peanuts.
Key ingredient breakdown
| Ingredient | Role |
|---|---|
| Milk chocolate with sweetener (maltitol) | Outer coating; no added sugar; identical taste to milk chocolate |
| Milk protein | Primary protein source; casein and whey fractions |
| Caramel / salted caramel flavoured layer | Core structural layer; condensed milk base; maltitol-sweetened |
| Collagen hydrolysate (bovine) | Secondary protein; connective tissue amino acids; texture |
| Maltitol | Primary polyol sweetener; no added sugar |
| Sorbitol | Secondary polyol humectant; maintains texture |
| Oligofructose | Prebiotic fibre; texture agent |
| Barley malt extract | Natural flavour; trace gluten |
| Salt (Salted Caramel only) | Genuine salt for the salt-sweet contrast |
Allergens
Contains milk, soy (lecithin) and barley (gluten trace). May contain nuts, eggs and peanuts. Not suitable for vegetarians (bovine collagen hydrolysate). Not suitable for vegans. Always refer to the current product label for the most up-to-date allergen information.
Nutritional values per bar (55g) — by flavour
| Flavour | Energy | Fat | Sat. fat | Carbs | Sugars | Protein | Salt |
|---|---|---|---|---|---|---|---|
| Mars | 789 kJ / 189 kcal | 7.1g | 4.3g | 17g | 1.7g | 18g | 0.15g |
| Salted Caramel | 820 kJ / 196 kcal | 7g | 4g | 17g | 2g | 18g | 0.2g |
Format guide
| Format | Bars | Total protein |
|---|---|---|
| Single bar | 1 × 55g | 18g |
| Box of 12 | 12 × 55g | 216g |
Q1 — How much less sugar does the Mars Hi Protein Low Sugar Bar contain vs a standard Mars bar?
A standard Mars bar (51g) contains approximately 33g of sugar. The Mars Hi Protein Low Sugar Bar (55g) contains 1.7g of total sugars per bar — a reduction of over 95% at a slightly larger bar size. The sweetness comes entirely from maltitol, a sugar alcohol that delivers equivalent sweetness perception to sucrose at a fraction of the glycaemic impact.
Q2 — What is the difference between the Mars and Salted Caramel variants?
The Mars variant uses a classic caramel-flavoured coating layer — a chocolate-caramel combination that replicates the profile of the original Mars bar. The Salted Caramel variant uses a dedicated salted caramel flavoured layer (16% of the bar) with real salt added to create a genuine sweet-salty contrast. The chocolate coating percentage is slightly higher in the Salted Caramel (23% vs 21%) and both deliver 18g of protein per bar.
Q3 — Why is the Mars Hi Protein Low Sugar Bar not suitable for vegetarians?
The bar contains collagen hydrolysate from bovine (cattle) collagen — an animal structural protein used both as a secondary protein source and as a texture agent. Collagen cannot be sourced from plant or vegetarian ingredients. This applies to both the Mars and Salted Caramel variants.
Q4 — Does the barley malt extract make this bar unsuitable for gluten-free diets?
Barley is a gluten-containing grain. While the quantity of barley malt extract in the formula is small, individuals with coeliac disease or severe gluten intolerance should exercise caution. The bar is also produced in a facility that may process gluten-containing ingredients. Verify with the current product label.
Q5 — Is the box of 12 more economical?
Yes. The box of 12 provides a lower cost per bar than purchasing individually. At one bar per day, the box provides 12 days of supply across both flavours.