Effects of Wine Change After 40, Health Experts Say: Don’t Drink the Same Amount as 15 Years Ago

There is a comment we hear often—or tell ourselves—when we are past 40: “I used to be able to have two glasses of wine and sleep perfectly the next day; now, with just one, I sleep terribly.” It isn’t necessarily just a belief. Our body at 40, 50, or 60 doesn’t process and distribute alcohol in exactly the same way as it did decades earlier.

One reason lies in body composition. As we age, we tend to lose muscle mass and total body water, while fat can increase proportionally. As the National Institute on Alcohol Abuse and Alcoholism (NIAAA) explains, these changes can cause the same amount of alcohol to produce higher blood concentrations than when we were younger.

This affects both sexes, though there are physiological differences between men and women. The NIAAA notes that women, on average, have less body water than men, so, for the same weight and amount consumed, they can reach higher blood alcohol concentrations. Age adds another variable: medications. As we grow older, the likelihood of taking treatments that can interact with alcohol increases, and some combinations can cause drowsiness, dizziness, problems with coordination, or raise other risks.

Why a glass may feel stronger with age

There isn’t a specific age at which alcohol suddenly starts to sit worse. Changes are gradual and vary greatly from person to person. Weight, sex, the amount of body water, diet, how quickly we drink, certain medications, and our health status influence the alcohol concentration that reaches the body and its effects.

Sleep is another good example. While a drink can make us feel sleepy and seemingly help us fall asleep, that does not necessarily mean it helps us rest better. Alcohol can alter the architecture of sleep and promote more fragmented rest.

That’s why someone may fall asleep quickly after drinking and yet wake up several times during the night, or wake up the next day with a sense of poorer rest. As sleep becomes more fragile with age, that difference can become much more noticeable.

In women, perimenopause adds to this

In the case of women, there is a stage during which several of these changes can coincide: the transition toward menopause. Hormonal fluctuations occur simultaneously with aging, and hot flashes, sleep disturbances, migraines, or palpitations can appear. Distinguishing what portion is due to alcohol, what to hormones, and what to other factors isn’t always easy.

Rebeca García, doctor in hormonal health, explains it this way: “Does wine still sit the same? Hormonal changes, alcohol tolerance, and the science behind perimenopause. As we move toward perimenopause and menopause, many women notice that a glass of wine triggers uncomfortable symptoms they didn’t have before: insomnia, migraines, or an unexplained rise in palpitations and hot flashes. However, from the pharmacy’s perspective we must separate subjective perception from scientifically verified causality.”

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A post shared by Dr. Rebeca García | Hormones · Longevity · Lifestyle Medicine (@drarebecagarcia)

That last nuance is important. A 2026 scientific review on alcohol, perimenopause, and menopause analyzed 57 studies and found heterogeneous results in aspects such as vasomotor symptoms and sleep. The authors also noted that perimenopausal women were underrepresented relative to postmenopausal women. Therefore, the fact that a woman begins tolerating wine worse coinciding with perimenopause does not by itself prove that hormonal changes are the only cause.

And what about men?

Men do not experience a direct menopause-like change, but that doesn’t mean their alcohol tolerance remains unchanged with age. They also undergo shifts in body composition, metabolism, and sleep. Body water can decrease and sensitivity to certain alcohol effects can rise. Additionally, older adults are more likely to be taking medications that can interact with alcoholic beverages.

The NIAAA specifically warns that older people can experience alcohol effects more intensely even without increasing the amount they drink. That is why a man who discovers at 55 that the two glasses that once slept perfectly at 30 now ruin his sleep does not have to be imagining it. The explanation, however, should not be reduced to a supposed universal “loss of tolerance.” The response depends on many factors, and there are large individual differences.

It is also useful to distinguish between the effects of ethanol and those that some people attribute to specific drinks. Wine contains compounds such as histamine and sulfites. Some individuals may experience symptoms after consuming it, though pinpointing the exact cause of a headache, flushing, or palpitations is not always straightforward.

Diamine oxidase (DAO) participates in histamine breakdown, and low activity has been linked to certain symptoms. However, the available evidence does not allow one to claim broadly that the fall in menopausal estrogen reduces DAO to the point that wine suddenly sits worse. That is why it is important to differentiate between known mechanisms and explanations that are still under investigation.

Teresa Bueno, pharmacist, urges us to pay attention to how our bodies respond to wine

For Teresa Bueno, a pharmacist, the starting point should be to observe whether there is a pattern. “Does this mean you have to give up that glass of wine completely? Rather than establishing broad prohibitions, the important thing is to learn how our bodies respond in this new stage. In the pharmacy, we often see that many women continue drinking the same amount as ten or fifteen years ago and are surprised when the effects are no longer the same. The body changes, and our tolerance can change too.”

“It’s worth paying attention, for example, to the timing of alcohol consumption. That glass of wine with dinner may affect nighttime rest in a way it didn’t years ago. This becomes especially relevant during perimenopause, when insomnia, night awakenings, or hot flashes can already disrupt sleep quality. If we add something that fragments sleep even more, we can easily fall into a cycle of fatigue, irritability, and worse rest,” adds the expert.

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A post shared by Teresa Bueno | Pharmacist | Longevity & Wellness (@farmaciateresabueno)

Although Teresa Bueno speaks specifically about women because she addresses perimenopause, part of her advice also applies to men: observing whether there is a repeated link between consumption and certain symptoms can offer more information than simply comparing current tolerance with what it was ten or twenty years ago.

No siempre es “que ahora el vino me sienta mal”

There is also a point we often overlook: what has changed with age may not be exclusively our body’s capacity to metabolize alcohol. Perhaps we sleep worse to begin with. Perhaps we are taking a medication we didn’t need before. We have less muscle mass. We drink less frequently and have lost part of the acquired tolerance. Or certain amounts now interfere with rest in a much more noticeable way.

In women, menopause-transition changes can add to these factors, though research is still trying to determine to what extent they directly explain a reduced tolerance to alcohol. Therefore, when a glass of wine stops sitting the same as twenty years ago, it may be more accurate to talk about a combination of changes rather than a single cause.

Our bodies age, our body composition changes, and so do sleep, medical treatments, and, in women, hormonal environment. The amount of wine may be exactly the same. What is no longer exactly the same is the body that receives it.