For most adults, seven or more drinks per week puts you in a high-risk category for alcohol-related harm. That’s the conclusion of Canada’s updated 2023 guidance on alcohol, which is the most specific weekly framework currently available. U.S. guidelines frame it differently, capping moderate drinking at two drinks per day for men and one for women, but the World Health Organization goes further: no amount of alcohol is truly safe.
The honest answer is that “too much” depends on what kind of risk you’re willing to accept. Here’s what the numbers actually look like.
What the Guidelines Say
The U.S. Dietary Guidelines define moderate drinking as up to two drinks per day for men and one per day for women. That translates to roughly 14 drinks per week for men and 7 for women, though the guidelines emphasize daily limits rather than a weekly total. Drinking less is better than drinking more, and the guidelines are clear that people who don’t drink shouldn’t start.
Canada’s 2023 guidance from the Canadian Centre on Substance Use and Addiction takes a more granular approach, breaking weekly consumption into three tiers. One to two drinks per week carries low risk. Three to six drinks per week represents moderate risk. Seven or more drinks per week falls into increasingly high risk. The guidance also recommends never exceeding two drinks on any single day, even if your weekly total stays low.
The WHO issued its bluntest statement yet in early 2023: “No level of alcohol consumption is safe for our health.” The agency’s position is that risk begins with the first drink, and the more you consume, the greater the harm. There is no threshold below which alcohol’s cancer-causing effects simply don’t apply.
What Counts as One Drink
A standard drink in the United States contains about 14 grams of pure alcohol. That’s less liquid than most people assume:
- Beer: 12 ounces at 5% alcohol
- Wine: 5 ounces at 12% alcohol
- Spirits: 1.5 ounces (a single shot) at 40% alcohol
- Hard seltzer or malt liquor: 8 to 10 ounces at about 7% alcohol
A typical restaurant pour of wine is often 6 to 8 ounces, meaning one glass can count as 1.5 standard drinks. A pint of craft beer at 7% or 8% alcohol is closer to two standard drinks than one. If you’re trying to track your weekly intake honestly, measuring matters more than counting glasses.
Binge Drinking Changes the Math
Even if your weekly total seems reasonable, the pattern matters. Binge drinking is defined as consuming enough alcohol to bring your blood alcohol level to 0.08% or higher, which typically means five or more drinks for men, or four or more for women, within about two hours. Saving all your weekly drinks for a single evening is significantly more dangerous than spreading the same number across several days. Binge episodes carry acute risks (injuries, alcohol poisoning, impaired judgment) on top of the cumulative damage from the alcohol itself.
Why Women Face Higher Risk
The different thresholds for men and women aren’t arbitrary. Men have more active versions of the enzyme that breaks down alcohol, both in the stomach and the liver. Women don’t produce this enzyme in the stomach at all, and the version in their liver works less efficiently. The result is that after drinking the same amount, women end up with higher blood alcohol levels and keep alcohol in their systems longer. This is a straightforward biological difference, not a guideline based on body weight alone.
Cancer Risk Starts Low
Alcohol is a confirmed carcinogen linked to cancers of the mouth, throat, esophagus, liver, breast, and colon. What surprises many people is that even light drinking raises risk for some of these. Women who have one drink per day have a measurably higher risk of breast cancer than women who have less than one drink per week.
The U.S. Surgeon General’s Advisory put this in concrete terms. Out of 100 women who drink less than one drink per week, about 17 will develop an alcohol-related cancer over their lifetime. Among 100 women who drink one per day, that number rises to 19. At two drinks per day, it climbs to 22. For men, the baseline is 10 out of 100, rising to 11 at one drink per day and 13 at two drinks per day. These are not enormous jumps at the individual level, but they represent real, measurable increases in risk.
Heavy drinking amplifies things dramatically. People who drink heavily are five times as likely to develop cancers of the mouth, throat, or esophagus compared to non-drinkers. Liver cancer risk doubles. The relationship is dose-dependent: more alcohol means more risk, with no clear safe floor.
The Heart Health Question
For years, moderate drinking was promoted as heart-healthy, largely based on studies showing a “J-shaped curve” where light drinkers had lower cardiovascular death rates than both non-drinkers and heavy drinkers. Some of that data is real. A large analysis of U.S. adults found that light-to-moderate drinkers had 26% to 29% lower cardiovascular mortality compared to lifetime abstainers. The lowest overall mortality risk appeared at about half a drink per day.
But this picture has gotten more complicated. Some of the apparent benefit may come from the fact that “non-drinkers” in older studies included people who quit drinking due to illness, making the comparison group look less healthy than it actually was. More recent analyses have narrowed the potential benefit considerably. And any cardiovascular benefit has to be weighed against the increased cancer risk, which begins at even low levels of consumption. For most people, the cancer risk offsets whatever heart protection moderate drinking might provide.
How Alcohol Disrupts Sleep
One of the less obvious costs of regular drinking is poor sleep quality. Alcohol is a sedative, so it helps you fall asleep faster, but it fragments the second half of your night. It suppresses REM sleep (the phase critical for memory and emotional processing) even at doses as low as one to two drinks. Higher doses, around five or more drinks, produce more pronounced disruptions: more time awake in the middle of the night, reduced sleep efficiency, and worsening of any existing breathing problems during sleep.
Even low-to-moderate intake (one to two drinks for women, one to three for men) consumed near bedtime has been associated with increased breathing disruptions during sleep. If you drink regularly and wake up feeling unrested despite getting enough hours, the alcohol itself is a likely culprit.
Signs You May Be Drinking Too Much
Numbers are useful, but your own experience matters too. Some patterns suggest your drinking has moved past what your body handles well: needing more drinks to feel the same effect, finding it harder to stop once you start, continuing to drink despite it causing problems in your relationships or daily life, spending significant time drinking or recovering from it, or feeling withdrawal symptoms like anxiety, shakiness, or trouble sleeping when you go without.
You don’t need to meet a clinical threshold to decide your drinking is more than you want it to be. If you’re regularly exceeding seven drinks per week, or if your drinking pattern involves frequent binge episodes, you’re in a zone where measurable health consequences become increasingly likely. The less you drink, the lower your risk. That’s the one thing every major health organization agrees on.