Why alcohol warning labels and minimum unit pricing matter for cancer prevention

Alcohol is a well-established cause of cancer, yet many people remain unaware of the risk. Alcohol use contributes to at least seven types of cancer, and globally alcohol was estimated to account for one in 24 cancer cases in 2020 (Rumgay et al., 2021; IARC, 2012; Bagnardi et al., 2015). Here in Canada, our team estimated in our recent study in the Lancet that alcohol caused 9,498 cancer cases and 3,866 cancer deaths in 2022.

Policies such as alcohol warning labels, which inform consumers about cancer risk and other health harms, and minimum unit pricing, which legislates a floor price for cheap, high-strength alcohol products, have the potential to prevent substantial numbers of cancer cases and deaths.

Our research team set out to find out just how many cancer cases and deaths in Canada could be prevented by these policies by modelling five different policy scenarios:

• Two scenarios involved warning labels: a cancer warning label and a rotating multi-message label (i.e., labels that cycle between a cancer warning, standard drink information, and low-risk drinking guidelines).
• A further two looked at minimum unit pricing – one scenario at CAD$1.75 per standard drink (equivalent to roughly 59p per UK alcohol unit) and another at CAD$2.00 per standard drink (equivalent to roughly 68p per UK alcohol unit).
• The fifth scenario was a combined policy consisting of a CAD$2.00 minimum unit price per standard drink with a cancer warning label. We included the cancer warning label for this combined policy scenario because warning labels that communicate alcohol’s link to cancer are under active policy consideration in Canada. For example, Bill S-202, a proposed federal bill, would require alcohol warning labels to include a message about the direct causal link between alcohol consumption and fatal cancers.

The findings were clear: all five policies were estimated to reduce alcohol use and, in turn, alcohol-attributable cancer cases and deaths. However, the size of the effect differed across policy scenarios. Table 1 below summarizes the estimated reductions in alcohol-caused cancer cases and deaths across the five policy scenarios.

The labelling scenarios suggested that stronger label designs could produce larger reductions in harm. A cancer warning label alone was associated with modest reductions in alcohol use and alcohol-attributable cancer, while the rotating multi-message label was associated with substantially larger estimated effects. These estimates were informed by the Yukon alcohol labelling study, which found greater reductions in labelled product sales for multi-message rotating labels than for cancer-only labels (Zhao et al., 2020).

The minimum unit pricing scenarios in our study were also associated with meaningful reductions in cancer incidence and mortality. Both thresholds we modelled (CA$1.75 per standard drink (59p per UK alcohol unit) and CA$2.00 (68p per UK alcohol unit)) were associated with reductions in alcohol use and alcohol-attributable cancer, with the higher threshold producing larger estimated effects. We focused on minimum unit pricing because it targets the cheapest alcohol products, and previous Canadian modelling has suggested that it may be more effective than broader price or tax increases in reducing alcohol-related harm.

The largest estimated reductions were seen when policies were combined. Pairing a CA$2.00 minimum unit price with a cancer warning label was associated with greater reductions in alcohol use and alcohol-attributable cancer than either policy on its own. This likely reflects the fact that warning labels and minimum pricing operate in different ways: labels can increase awareness of alcohol-related cancer risk and other harms, while minimum pricing reduces access to very cheap alcohol. Together, they may have greater potential to reduce both cancer burden and health inequalities.

Our study also highlights an important and often overlooked point: these policies do not affect all groups equally. The largest proportional benefits were seen among lower-income groups and younger age groups. Under the combined scenario, the lowest income quintile was estimated to see an 8.1% reduction in alcohol-attributable cancer incidence and a 5.8% reduction in alcohol-attributable cancer deaths, compared with 5.1% and 4.3%, respectively, in the highest income quintile. The alcohol-harm paradox describes how socioeconomically disadvantaged groups often experience greater harm despite similar or lower levels of consumption (Bloomfield, 2020). Our findings suggest that alcohol policies can shape how these harms are distributed across the population, with different policy approaches producing different socioeconomic patterns of benefit.

This has direct relevance for current policy debates in the UK. In England, new alcohol labelling standards have been proposed, and there are ongoing discussions about the inclusion of stronger health warnings, including rotating messages (UK Government, 2025). Minimum unit pricing is also already part of the UK policy landscape, having been implemented in both Scotland and Wales. In Scotland, the minimum unit price is now 65p per unit, and in Wales the policy has been extended, and the minimum price will rise from 50p to 65p per unit in October 2026. The effectiveness of these policies is likely to depend, in part, on how they are designed (Sherk et al., 2026). Multi-message rotating labels were substantially more effective than cancer-only labels in our study and, when combined with pricing policies, produced the largest reductions in harm, particularly among lower-income groups (Sherk et al., 2026). At a time when stronger labelling proposals, particularly rotating warnings, may face industry opposition, this evidence highlights the potential public health and equity gains of more comprehensive approaches.

Taken together, these findings suggest that synergistic alcohol policies which both inform and influence behaviour, through clear health warnings and reduced availability of cheap alcohol, can make a meaningful contribution to cancer prevention. Importantly, they also have the potential to reduce health inequalities by delivering the greatest benefits to those most affected by alcohol-related harm. As countries such as the UK consider strengthening alcohol labelling and pricing policies, the evidence indicates that a combination of policies is likely to deliver the greatest gains.

Written by Keegan Lawrence, Research Associate, and Dr Adam Sherk, Scientist, Canadian Institute for Substance Use Research, University of Victoria.

All IAS Blogposts are published with the permission of the author. The views expressed are solely the author’s own and do not necessarily represent the views of the Institute of Alcohol Studies.

Table 1: Estimated reductions in alcohol-caused cancer incident cases and mortalities at baseline and under each policy scenario

Outcome	Baseline	Policy 1: Cancer Warning Label	Policy 2: Multi-Message Rotating Label	Policy 3: MUP of $1.75	Policy 4: MUP of $2.00	Policy 5: MUP of $2.00 with a Cancer Warning Label
Alcohol-caused cancer incident cases	9,498	-163 (-1.7%)	-446 (-4.7%)	-211 (-2.2%)	-524 (-5.5%)	-674 (-7.1%)
Alcohol-caused cancer mortalities	3,866	-51 (-1.3%)	-139 (-3.6%)	-67 (-1.7%)	-169 (-4.4%)	-216 (-5.6%)