Hair of the Dog and Other Hangover Myths

Waking up with a pounding head and a churning stomach sends a lot of people searching for natural hangover cures — herbal teas, vitamins, greasy breakfasts, or the old advice to have another drink. Some of these habits genuinely make the morning easier. Others have almost nothing behind them beyond repetition. Here’s a plain look at what the research supports, what it doesn’t, and what actually reduces how rough you feel.

What Actually Causes a Hangover

A hangover isn’t caused by one thing. Alcohol suppresses vasopressin, a hormone that helps your body hold onto water, which is why you make more trips to the bathroom and wake up parched. At the same time, your body breaks alcohol down into acetaldehyde, a compound that’s considerably more toxic than alcohol itself. Add disrupted sleep architecture, low-grade inflammation, stomach irritation, and a dip in blood sugar, and you get the familiar package of headache, nausea, fatigue, and general misery.

That’s worth knowing, because it explains why no single remedy fixes everything. Water addresses fluid loss but does nothing about acetaldehyde. A nap doesn’t settle your stomach. Any product promising to erase all of it at once is overselling.

What the Research Says About Natural Hangover Cures

The honest summary: the evidence is thin. Researchers at King’s College London reviewed the field and assessed 21 placebo-controlled randomised trials of clove extract, red ginseng, Korean pear juice, and other hangover remedies, finding that while some studies showed statistically significant improvements, all the evidence was of very low quality, usually due to methodological limitations or imprecise measurement. Just as telling, no two studies examined the same remedy, and no result has been independently replicated.

An earlier and widely cited review reached a similar place, concluding that no strong evidence supports the effectiveness of conventional or complementary interventions to prevent or treat alcohol hangover. So when a supplement or tea blend claims to be clinically proven, that claim is usually resting on one small study that nobody has repeated.

Why Food and Body Size Change How You Feel

Two of the most common pieces of folk advice do hold up. Eating a substantial meal before drinking slows how quickly alcohol moves from your stomach into your bloodstream, which lowers your peak blood alcohol concentration for the same number of drinks. Protein, fat, and fiber all help here. Eating while you drink works too, though less dramatically than eating beforehand.

Body size and composition matter for a related reason. Alcohol distributes through body water, so a larger person with more total body water reaches a lower concentration from the same amount of alcohol. This is also why women, who on average have a lower proportion of body water, tend to reach higher blood alcohol levels than men of the same weight drinking identically. None of this cures a hangover — it just shifts how much alcohol it takes to get one.

What Herbal Teas and Vitamins Can and Cannot Do

Herbal tea is a reasonable thing to drink the morning after. It replaces fluid, it’s warm and settling, and ginger or peppermint may help mild nausea. What it does not do is neutralize alcohol’s byproducts or shorten the hangover. The benefit is comfort, not cure.

Vitamins follow the same pattern. Heavy drinking does deplete B vitamins, and if you drink regularly, that depletion is a real health concern worth discussing with a doctor. But taking a B-complex on Saturday morning won’t undo Friday night. The commercial vitamin drinks marketed as hangover cures haven’t shown reliable benefit in controlled testing.

Hair of the Dog Does Not Work

Drinking more alcohol the next morning temporarily blunts symptoms because it delays the acetaldehyde processing your body is in the middle of. The hangover isn’t canceled; it’s postponed, and often it comes back worse once the second round wears off. Beyond the practical downside, using alcohol to treat alcohol’s aftereffects is one of the patterns clinicians watch for when assessing problem drinking. It’s the one piece of traditional hangover advice worth dropping entirely.

Remedies With Some Research Behind Them

A handful of compounds have shown signals in individual studies, though none rise to the level of a recommendation. Reviews have looked at:

• Red ginseng
• Korean pear juice
• Clove extract
• Prickly pear (Opuntia ficus-indica)
• Artichoke extract
• L-cysteine and N-acetylcysteine

Of the interventions studied, reviewers noted that clove extract, tolfenamic acid, and pyritinol may most warrant further study — a phrasing that means “worth researching,” not “start taking this.” Supplements also aren’t reviewed for effectiveness the way medications are before they hit shelves, so the label claim and the evidence are frequently unrelated.

What Genuinely Helps the Morning After

Time is the only actual cure, and most hangovers clear within 24 hours. In the meantime, a few things reliably make it more bearable: drinking water or an electrolyte beverage to replace what you lost, eating something plain to bring blood sugar back up, and sleeping more if you can. Bland carbohydrates tend to sit better than the traditional greasy breakfast, which can aggravate an already irritated stomach.

Prevention is where you have the most leverage. Drinking less is the only approach that works consistently. Beyond that, alternating alcoholic drinks with water, eating beforehand, and choosing lighter-colored drinks all help — darker liquors like bourbon and dark rum, along with red wine, contain more congeners, the byproducts of fermentation and aging linked to more severe hangovers.

Be Careful With Pain Relievers

Reaching for something from the medicine cabinet deserves a moment of thought. Acetaminophen and alcohol are both processed by the liver, and combining them raises the risk of liver damage, particularly after heavy drinking. NSAIDs like ibuprofen and aspirin avoid that specific problem but can irritate a stomach lining alcohol has already inflamed. Notably, common painkillers such as paracetamol and aspirin have never been evaluated for hangover in placebo-controlled randomised trials — they’re used out of habit, not evidence.

When It’s More Than a Hangover

Some symptoms point past an ordinary rough morning. Confusion, seizures, repeated vomiting, slow or irregular breathing, a very low body temperature, or the inability to wake someone up can indicate alcohol poisoning, which is a medical emergency. If you find yourself needing remedies routinely, or drinking to steady yourself in the morning, that’s worth raising with a doctor rather than managing with tea.

Sources: Roberts et al., Addiction (2022); King’s College London; Pittler, Verster and Ernst, BMJ (2005); Jayawardena et al., Human Psychopharmacology (2017).