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In small amounts: 85% chocolate has far less sugar than milk chocolate and provides fibre and cocoa flavanols, but it's energy-dense and can contain cadmium.
Short answer: less sugar than milk chocolate, plus fibre, minerals and cocoa flavanols – but around 600 kcal per 100 g. The authorised claim about cocoa flavanols and blood vessels only applies at a daily intake of at least 200 mg of flavanols, and how much a bar contains varies widely. Because of cadmium and lead, about 10 to 20 g a day is a sensible guide, and less for children.
Milk chocolate is mostly sugar and milk powder, often with only 30 to 40 % cocoa. From about 80 to 85 % cocoa this flips: less sugar, more cocoa mass and cocoa butter, and usually more minerals.
Usually just cocoa mass, cocoa butter and a little sugar, sometimes vanilla. Typical values per 100 g:
| Nutrient | 85% chocolate | In context |
|---|---|---|
| Energy | about 580–620 kcal | energy-dense |
| Fat | about 45–52 g | mainly from cocoa butter |
| Carbohydrate | about 15–20 g | relatively little of it sugar |
| Sugar | about 12–15 g | far less than milk chocolate |
| Fibre | about 10–15 g | fairly high for chocolate |
| Protein | about 8–12 g | moderate |
Values vary by brand and recipe – the nutrition table tells you more than the marketing copy. More in the ingredient guide: Dark chocolate and Raw cacao.
There is one authorised claim for cocoa flavanols (Regulation (EU) No 851/2013). In essence: cocoa flavanols help maintain the elasticity of blood vessels, which contributes to normal blood flow. It may only be used for cocoa drinks or dark chocolate that provide at least 200 mg of cocoa flavanols a day, and only together with that daily amount.
So it doesn't automatically apply to an ordinary supermarket bar. Flavanol content usually isn't on the packet and depends heavily on processing: fermentation, roasting and above all alkalisation of the cocoa reduce it. In one analysis, natural cocoa powders contained around 35 mg of flavanols per gram on average, heavily alkalised ones only about 4 mg. So lots of cocoa doesn't automatically mean lots of flavanols.
The largest study so far, COSMOS, followed more than 21,000 older adults for a median of 3.6 years. It tested a cocoa extract with 500 mg of flavanols a day in capsule form – not chocolate. The total number of cardiovascular events did not fall significantly; a secondary analysis found fewer deaths from cardiovascular disease. That doesn't mean "chocolate protects the heart" – you'd only reach that amount of flavanols through chocolate by eating large amounts, and then the calories and sugar outweigh everything else.
Dark chocolate can make a small contribution to magnesium, iron and zinc; how much iron the body absorbs depends on several factors. It shouldn't be your main source: for magnesium, foods such as pumpkin seeds matter more, for iron pulses and meat, for zinc nuts and seeds.
The cocoa plant takes up cadmium from the soil, especially from volcanic soils in parts of Central and South America. EU maximum levels (Regulation (EU) 2023/915) are graded by cocoa content:
| Product | Maximum cadmium level |
|---|---|
| Milk chocolate with less than 30 % total dry cocoa solids | 0.10 mg/kg |
| Chocolate with less than 50 %, or milk chocolate with 30 % or more total dry cocoa solids | 0.30 mg/kg |
| Chocolate with 50 % or more total dry cocoa solids | 0.80 mg/kg |
| Cocoa powder sold to consumers | 0.60 mg/kg |
In tests in Bavaria (2018), cadmium was detectable in all cocoa products, but levels above the limit were rare; the authority saw no increased health risk.
Lead gets onto the beans mainly after harvest, for example from dust during drying. In 2022 a US consumer organisation found that for 23 of 28 dark chocolate bars, around 28 g a day already exceeded precautionary US reference values for at least one of the metals – not EU limits.
That's no reason to give it up, but it is a reason for small portions. Children and pregnant women should be cautious, because heavy metals weigh more heavily for them. Switching between brands and origins helps too.
Around 600 kcal per 100 g come mainly from the cocoa butter. A portion of 10 to 20 g, usually 1 to 3 squares, fits easily into everyday life for many people. That keeps calories, sugar and heavy metals in check.
| Cocoa content | Sugar per 100 g | Sugar per portion (20 g) | Verdict |
|---|---|---|---|
| 70 % cocoa | about 25–30 g | about 5–6 g | still fairly sweet |
| 85 % cocoa | about 12–15 g | about 3 g | a sensible compromise |
| 90–100 % cocoa | about 0–7 g | about 0–1 g | very bitter |
Typical packet values; they vary by product. Going from 70 to 85 % often halves the sugar, and for many people the taste is still very edible. More on cutting back on sweetness: Sugar alternatives.
Good dark chocolate only needs cocoa mass, cocoa butter, a little sugar and perhaps real vanilla. Less ideal are long lists with flavourings, several emulsifiers or other plant fats alongside the cocoa butter (these must be declared).
Chocolate contains a lot of fat – in a good bar it comes from cocoa butter, not from added plant fats. That doesn't make it lower in calories. More on fats: Omega-3 vs omega-6 and how to spot good olive oil.
Roasted notes, bitterness and the firm texture slow you down: many people automatically eat less 85% chocolate, and a small amount after a meal is often enough. Very sweet bars don't have this built-in portion brake.
Compared with biscuits, bars or filled chocolates, it's often the simplest choice: fewer ingredients, less sugar, no fillings.
As a small extra, not as your main snack:
Common mistakes: letting the "healthy" image talk you into big portions; looking only at the percentage on the front instead of the ingredients and sugar; giving children dark chocolate every day.
Bitter cocoa goes well with the natural sweetness of banana or berries – for example a little melted dark chocolate over banana bread. More ideas: Recipes with no added sugar, Dessert recipes, Dishes with plenty of fibre.
| Criterion | Better | Less ideal |
|---|---|---|
| Cocoa content | 85 % or more | well below that |
| Ingredients list | short and clear | long, lots of additives |
| Fat source | cocoa butter | other plant fats |
| Sugar | moderate | high despite "dark" |
| Portioning | individual squares | large snack formats |
Organic labels or details of origin tell you nothing about flavanol or cadmium content.
It isn't a health product, but among chocolates it's often the better choice: more cocoa, less sugar – though energy-dense and with heavy metals. It makes the most sense in small amounts, in place of other sweets.
For most adults about 10 to 20 g, or one to three squares. Children much less, and not every day.
Yes – cadmium from the soil and lead from dust; the more cocoa, the more cadmium. Maximum levels apply in the EU. In small amounts and with variety, that's no cause for concern for adults.
Not necessarily: less sugar, but it tends to have more cadmium, and many people don't like very bitter bars. For many, 85 % is the practical middle ground.
That can't be said in this form. The authorised claim is about the elasticity of blood vessels and only applies at a daily intake of at least 200 mg of cocoa flavanols; how much a bar contains is usually unknown.
Less sugar, more cocoa: 85% chocolate is an easy-to-judge choice when you want something sweet – in small portions, with a short ingredients list and changing brands. No miracle food.
This article does not replace advice from a doctor or dietitian.