How to Cure a Hangover (What Science Says)

By NUDAY Editorial · Reviewed by NUDAY Research Team · Last updated May 2026

There's no instant cure. There's just biology — and a small set of things that genuinely shorten the misery, plus a much bigger set of things that don't.

This guide breaks down what's actually happening in your body during a hangover, what the research says works, what's marketing, and the one approach that prevents most of it before it starts.

What's actually happening in a hangover

A hangover isn't one thing. It's three things stacking on top of each other:

1. Dehydration. Alcohol is a diuretic — it makes your kidneys produce more urine, which pulls fluid and minerals out of your system. Most people lose more fluid than they take in by the time they fall asleep.
2. Acetaldehyde buildup. Your liver breaks alcohol down into a compound called acetaldehyde — approximately 30 times more toxic than alcohol itself. When you drink faster than your liver can process, acetaldehyde piles up. This is the molecule most responsible for the morning misery.
3. Inflammation and sleep disruption. Alcohol triggers low-grade inflammation, depletes B vitamins, and prevents you from reaching deep REM sleep cycles even when you sleep eight hours.

Curing a hangover means addressing all three. Most "cures" only target one.

What doesn't work (the myths)

The hangover industry is built on remedies that sound right but don't actually do much:

Hair of the dog

Drinking more alcohol the next morning delays the hangover. It doesn't cure it. You're pushing the problem four hours into the future.

Greasy food the morning after

A breakfast burrito feels satisfying but doesn't accelerate alcohol clearance. Fat may slow stomach emptying — which helps if you eat it before drinking, not after.

Coffee

Caffeine is a diuretic too. It makes a headache feel slightly better short-term but increases dehydration. Net effect: roughly zero.

Just water

Water alone replaces fluid but not the sodium, potassium, and magnesium you've flushed. You'll keep passing it through. Hydration without minerals isn't hydration.

Aspirin or painkillers

They reduce the headache temporarily but don't address dehydration, acetaldehyde, or inflammation. Some (ibuprofen) can compound stomach irritation after a heavy night.

Sweating it out at the gym

You're already dehydrated. Adding hard cardio makes things worse for the first hour. Light walking is fine. A heavy workout isn't.

What works vs what doesn't: side by side

What actually works	What doesn't (or makes it worse)
DHM 500mg before bed	Hair of the dog
Electrolytes with 500mg+ sodium	Plain water alone
B-complex (B1, B6, B12, folate)	Coffee on an empty stomach
N-acetyl cysteine (NAC)	Aspirin/painkillers as the only fix
Sleep through it	Hard cardio at the gym
Real food after the first hour	Greasy breakfast first thing

What actually works (the science)

The approaches with real evidence behind them:

1. DHM (Dihydromyricetin) — 300–500mg

DHM is a flavonoid extracted from the Japanese raisin tree (Hovenia dulcis). Research shows two specific actions: it speeds up acetaldehyde clearance by upregulating ALDH (the enzyme that breaks it down), and it modulates GABA-A receptors in the brain, which protects sleep quality even after drinking. Studies at 300–500mg before bed show meaningful improvements in next-day cognitive performance. This is the only supplement with strong evidence for hangover-specific outcomes.

2. Electrolytes — Sodium 500mg+, Potassium, Magnesium

You've lost more than water. You've lost the minerals that keep water inside your cells. Replenishing them is what actually rehydrates you — not the volume of liquid.

3. B-Complex Vitamins

Your liver burns through B vitamins (B1, B6, B12, folate especially) during alcohol processing. Replenishing them supports the energy reset that's supposed to happen overnight.

4. N-Acetyl Cysteine (NAC) or L-Cysteine

NAC supports glutathione production — your body's main antioxidant defence during alcohol processing. Glutathione gets depleted on heavy nights. Restoring it helps liver Phase 2 finish what Phase 1 started.

5. Sleep

The single most underrated tool. Your body does its repair work between deep sleep cycles. Even when alcohol disrupts the cycles, more total sleep hours equals more recovery time. Don't try to power through a hangover. Sleep through what you can.

6. Real food (after the first hour)

Once your stomach settles, protein plus carbs helps stabilise blood sugar and gives your liver substrate to work with. Eggs, toast, fruit, broth — these are what your body actually wants.

The honest truth: prevention beats cure

Every "cure" works better as a preventive. By the time you wake up with a hangover, half the damage is already done.

The before-bed stack — DHM, electrolytes, B-complex, and N-acetyl cysteine — loaded before sleep gives your body the cofactors it needs to handle overnight processing. Take them in the morning and you're catching up to a fire that's already half out.

A simple before-bed routine:

1. 500ml water with electrolytes
2. DHM 500mg + B-complex + N-acetyl cysteine
3. A small carb-and-protein snack
4. Hit the pillow

You'll still feel something the next morning if you went hard. But you'll feel half of what you would have — and you'll recover in hours instead of a full day.

Hangover gummies — do they work?

The category gets nuanced.

Most "hangover gummies" on the market dose DHM at 50–150mg per serving — a quarter to a third of what the studies actually use. That's why most people try them, feel nothing, and conclude gummies don't work.

The gummies that do work hit the clinical dose. 500mg DHM. Real electrolyte amounts. B-complex at meaningful levels. N-acetyl cysteine or L-cysteine added at proper amounts. The format isn't the issue. The dosing is.

NUDAY Next-Day Support vs the market average

Ingredient	NUDAY Next-Day Support	Market Average
DHM (Dihydromyricetin)	500mg	50–150mg
L-Cysteine	Included	Usually missing
B-Complex	Full spectrum	Partial or absent
Electrolytes	Real doses	Trace amounts
Added sugar	0g	2–6g

This is exactly why we built Next-Day Support Gummies — to put the clinical dose into a format people actually take consistently. 500mg DHM (3 to 10 times the market average). Plus L-cysteine, B-complex, and electrolytes. Two gummies, taken before bed, designed to support overnight processing while you sleep.

When a hangover isn't just a hangover

Some symptoms warrant medical attention:

• Severe headache that doesn't improve with rest and hydration
• Vomiting that won't stop after several hours
• Disorientation or confusion
• A racing heartbeat that doesn't settle
• Loss of consciousness or seizures

These can indicate alcohol poisoning or another condition. Get medical help.

Frequently Asked Questions

What is the fastest hangover cure?

There's no instant cure. The fastest path to feeling better is electrolytes plus DHM plus protein-rich food plus rest. Most recovery happens passively over 8–24 hours. Anything claiming to fix it in 10 minutes is overpromising.

Why is my hangover worse than usual?

Several factors compound severity: less sleep, drinking on an empty stomach, dehydration before drinking, darker spirits (more congeners), poor-quality alcohol, and individual differences in liver enzyme activity. Hot climates and heavy sweating during a night out also make it worse.

Does drinking water during alcohol intake prevent a hangover?

Partially. Water replaces fluid loss but not the electrolytes you're flushing. It helps, but a glass of water alongside each drink isn't a full prevention strategy on its own.

Can hangover gummies actually prevent hangovers?

At the right dose, yes — partially. Gummies with 500mg DHM, real electrolytes, B-complex, and N-acetyl cysteine taken before bed give your body the cofactors to handle overnight processing. Most gummies on the market are too underdosed to make a real difference.

How long does a hangover usually last?

8 to 24 hours for most people. Severity peaks 4–6 hours after blood alcohol returns to zero, then gradually improves. Mild lingering effects (fatigue, brain fog) can last 48 hours after a heavy night.

What's the best thing to eat for a hangover?

After nausea settles: eggs (cysteine plus protein), bananas (potassium), toast or rice (easy carbs for blood sugar), broth-based soup (sodium plus fluid), and fresh fruit (vitamins plus glucose). Skip greasy fried food first thing — it sits heavy.

Is DHM safe?

DHM has been used safely in traditional Asian medicine for centuries and is generally well tolerated at doses up to 500mg. No serious side effects have been reported in clinical research at standard doses. People with liver or kidney conditions should check with a doctor before adding any supplement.

Key Takeaways

• Hangovers stack three problems: dehydration, acetaldehyde buildup, and sleep disruption
• The only supplement with strong research evidence for hangover-specific outcomes is DHM at 300–500mg
• Most hangover gummies on the market underdose DHM by 3–10x — the main reason they don't work
• Prevention (loaded before bed) consistently outperforms morning treatment
• Water alone isn't hydration — your body needs the minerals water carries
• Sleep is the most underrated recovery tool
• Recovery typically takes 8–24 hours; supplements shorten this, not eliminate it
• NUDAY Next-Day Support delivers 500mg DHM per serving — 3 to 10 times higher than the typical market product

The bottom line

There's no magic cure. There's just biology, and a small set of things that genuinely shorten the misery.

The best hangover cure is the one you take before bed, not the one you reach for at 9am. By morning, the damage is done. The most effective approach is loading the cofactors your body needs while you sleep — so when you wake up, it's already half-handled.

If you want this packaged into one before-bed step, Next-Day Support Gummies are designed for exactly that. 500mg DHM, L-cysteine, B-complex, electrolytes — two gummies, before bed, working while you sleep.

Try Next-Day Support →

Sources & References

1. Shen, Y. et al. (2012). "Dihydromyricetin As a Novel Anti-Alcohol Intoxication Medication." Journal of Neuroscience, 32(1).
2. Pittler, M.H. et al. (2005). "Interventions for preventing or treating alcohol hangover: systematic review of randomised controlled trials." Cochrane Database.
3. Penning, R. et al. (2010). "The pathology of alcohol hangover." Current Drug Abuse Reviews, 3(2).
4. Verster, J.C. et al. (2020). "Mechanisms behind the alcohol hangover." Journal of Clinical Medicine, 9(9).
5. National Institute on Alcohol Abuse and Alcoholism (NIAAA). "Hangovers." NIH.