How Much Dark Chocolate Should You Eat Daily?

Reviewed and verified by Mona Shah MBE, Head Chocolatier and Co-Founder, Harry Specters.

There is no single recommended amount of dark chocolate that everyone should eat each day. If you enjoy it, a small amount can fit into a balanced diet, but research on cocoa flavanols does not give us a universal daily number of grams of ordinary dark chocolate.

That distinction matters. Dark chocolate contains cocoa compounds that have attracted a great deal of research, but it is still chocolate. The NHS Eatwell Guide places chocolate among foods high in fat, salt or sugar that should be eaten less often and in small amounts.

So rather than asking how much dark chocolate you should eat, it may be more useful to ask how it fits into the rest of your diet.

Where do daily dark chocolate recommendations come from?

You will often see very precise recommendations online: 20g, 30g or even 60g of dark chocolate every day.

The problem is that scientific studies do not all test the same thing.

Research may involve dark chocolate, cocoa drinks, cocoa extracts or supplements containing measured amounts of flavanols. Studies also use different doses and different groups of participants. That makes it difficult to turn the findings into one simple instruction such as “eat two squares of 70% chocolate every day”.

A 2025 systematic review and meta-analysis brought together 145 randomised controlled trials involving flavan-3-ol-rich foods and supplements. These included cocoa products alongside tea, apples, grapes and specific flavan-3-ol preparations. The analysis found improvements in blood pressure and blood-vessel function, particularly where blood pressure was already elevated, but there was considerable variation between studies.

That is interesting research. It is not a prescription for a particular weight of chocolate.

What do cocoa flavanols have to do with dark chocolate?

Cocoa contains a group of plant compounds called flavanols. These are one reason researchers have taken such an interest in cocoa and cardiovascular health.

The important point is that research using a measured amount of cocoa flavanols is not necessarily studying the same thing as a bar labelled “70% dark chocolate”.

Commercial chocolates can vary considerably in their flavanol content. Research comparing chocolate products has found that the cocoa percentage shown on the packaging does not necessarily provide a reliable indication of measured flavonoid content.

Processing matters too. Research looking at cocoa processing and flavanols found that alkalisation can substantially reduce flavanol levels.

So cocoa percentage tells you something useful about the recipe, but it does not provide a reliable measurement of flavanols.

If the terminology itself gets confusing, our guide to cacao and cocoa explains the difference between the two. Cocoa also contains compounds such as theobromine, which we cover separately in our guide to theobromine.

Is 85% dark chocolate healthier than 70%?

Not automatically.

An 85% chocolate contains a greater proportion of cocoa ingredients than a 70% chocolate, but that percentage alone cannot tell you exactly how many flavanols are present or whether eating it will produce a particular health effect.

There is also the rather important question of whether you actually enjoy it.

Very high cocoa percentages can taste considerably more intense. If you prefer 70% dark chocolate, there is little value in forcing yourself to eat 90% because you believe the higher number automatically makes it a healthier choice.

Chocolate should still be food, not medicine.

Why does portion size still matter?

Dark chocolate may contain cocoa flavanols, but it also contributes energy, fat and saturated fat to the diet. UK healthy-eating guidance therefore recommends eating foods such as chocolate less often and in smaller amounts rather than treating them as a necessary part of a healthy diet.

That does not mean dark chocolate needs to be avoided. It means the overall pattern of what you eat matters more than finding a supposedly perfect number of grams.

And “two squares” is not particularly precise either. One bar may have tiny squares; another may have much larger ones. If portion size matters to you, the nutritional information on the chocolate you are actually eating is more useful than a generic rule based on squares.

A more practical way to think about dark chocolate

If you enjoy dark chocolate, enjoy it for what it is.

There is research suggesting that flavan-3-ol-rich foods can affect measures such as blood pressure and blood-vessel function, but that evidence should not be stretched into a claim that everybody needs a certain quantity of dark chocolate every day.

Look at your diet as a whole, choose chocolate you genuinely enjoy and be wary of advice that turns one food into a daily health prescription.

If dark chocolate is your preference, you can explore our dark chocolate range to see the bars and chocolates currently available.

There is no magic number. Sometimes a few pieces of good dark chocolate are simply a few pieces of good dark chocolate — and that is reason enough to enjoy them.