If you want to eat chocolate and do better for the planet, dark chocolate is by far your best bet.
That’s one key takeaway from a study that compared different types of chocolate for their environmental effects. It found that the major environmental burden of this sweet treat lies within the ingredients used to make it—the main culprits being palm oil, and milk.
Focusing on the emerging chocolate market in Turkey, the researchers compared four types—dark, milk, white, and compound chocolate (where some cocoa butter is substituted by fats like palm oil.) For each type, they carried out a life cycle analysis, capturing everything from the field impacts where ingredients were grown, through to packaging and retail. They calculated impact across 18 categories, including global warming potential, land, water, and energy use.
Out of this comparison, dark chocolate emerged as the clear sustainability victor, with a smaller footprint than all other chocolate types across several impact categories.
Dark chocolate had a global warming potential of 2.32 kilograms of CO2-equivalent, which was almost half that of white chocolate, at 4.06 kilos per CO2-eq. It also excelled on land use, requiring only half of what white chocolate did, and used less water than white, milk, and compound chocolate. It also had the lowest freshwater and terrestrial pollution impact of all.
By comparison, compound chocolate used large amounts of freshwater and had a high marine pollution impact. White chocolate, meanwhile, had the highest global warming impact of all four, as well as the biggest water and pollution footprint overall.
When they looked through the lifecycle data, the researchers discovered that chocolate ingredients accounted for these differences, driving the bulk of the environmental burden in every case. The milk powder used to make milk and white chocolate relies on the land-, water-, and emissions-intensive dairy farming. The palm oil that replaces cocoa fats in compound chocolate comes from vast palm plantations that give this chocolate type a hefty water and pollution impact.
Other lifecycle factors like chocolate production method, energy use, and transport methods did contribute to the overall footprint of each chocolate, but they were overshadowed by the ingredient impacts. In fact, raw materials contributed 60% of chocolate’s environmental burden overall, and most of that was driven by milk and palm oil production.
The lack of both these ingredients in dark chocolate explains why it had a higher sustainability score. But it’s still not a perfect sweet treat. Despite using little or no milk, the biggest impacts from dark chocolate came from the terrestrial, freshwater and marine pollution caused by the larger share of cocoa cultivation needed to make this product.
Ultimately, this was the study’s point: different ingredients create trade-offs, and also harbor the biggest opportunities for change along the production chain of each chocolate type, including dark. Tweaking chocolate recipes to avoid or reduce those key impact hotspots is therefore the most powerful way to reduce their environmental burden, the researchers suggest.
In the meantime there’s a step every chocolate-lover can take: eat a little more dark chocolate and a little less milk. And that’s hardly a struggle.
Konar et. al. “Life cycle hotspots in chocolate production: Ingredient formulation, processing technologies, and pathways toward sustainable confectionery systems.” Science of the Total Environment. 2026.
Image: ©Anthropocene Magazine
