Signs of Alcohol Intolerance

Have you ever noticed your face turning red after just a glass of wine, or felt a pounding headache after drinking beer? These are not just random reactions. They may be signs of alcohol intolerance, a condition where the body struggles to break down alcohol effectively. Unlike alcohol allergy, which is rare and immune-based, alcohol intolerance is more common and linked to how your body processes certain compounds in drinks.

What Is Alcohol Intolerance?

Alcohol intolerance happens when the body lacks enzymes, such as aldehyde dehydrogenase (ALDH2), that help break down alcohol. As a result, acetaldehyde, a toxic byproduct of alcohol, builds up and causes unpleasant symptoms. Beyond genetic factors, intolerance can also be triggered by histamines, sulfites, and other additives found in wine, beer, and spirits.

Common Signs You May Have Alcohol Intolerance

The symptoms can vary from person to person but often include:

Flushed skin: A common reaction, especially after red wine.
Headaches or migraines: Triggered even after small amounts of alcohol.
Nasal congestion: Stuffy nose or sinus pressure after drinking.
Stomach issues: Bloating, cramps, or diarrhea.
Rapid heartbeat: Some people feel their heart racing.
Fatigue or brain fog: The next day can feel worse than a typical hangover.

These symptoms usually appear quickly, sometimes after just a few sips, and they are not the same as being drunk.

Why It Happens

There are several possible causes of alcohol intolerance:

Genetics: Enzyme deficiencies, particularly in East Asian populations, make alcohol breakdown more difficult.
Histamines: Found in wine and beer, they can trigger allergy-like symptoms.
Sulfites: Common preservatives in wine and mixers that may worsen intolerance.
Other intolerances: Lactose, gluten, or fructose intolerances can overlap, making certain drinks even more problematic.

How to Manage Alcohol Intolerance

If you suspect you have alcohol intolerance, you do not need to give up social life completely. Instead, you can make smarter choices:

Identify your triggers: Wine, beer, and certain spirits are more likely to cause issues.
Choose cleaner options: Vodka or gin with simple mixers may be easier to tolerate.
Drink smaller amounts: Even intolerant individuals may manage occasional low doses.
Stay hydrated: Water between drinks helps reduce intensity.
Track your reactions: Keeping notes can help you see patterns and avoid surprises.

How Intolera Can Help

Because alcohol intolerance often overlaps with other food sensitivities, managing it requires careful observation. Intolera makes this simple:

Scan drink barcodes to spot hidden ingredients like sulfites or additives.
Log symptoms after drinking to track patterns over time.
Analyze menus when dining out to avoid risky cocktails or wines.
Save safe options so you know which drinks you tolerate best.

With Intolera, you no longer need to guess why a glass of wine leaves you feeling unwell—it gives you the clarity to make safer choices.

Drink Smarter, Live Better

Alcohol intolerance may seem frustrating, but it does not have to limit your lifestyle. By recognizing the signs, adjusting your choices, and using tools like Intolera, you can enjoy social occasions with confidence and without discomfort.

Download Intolera today and take the guesswork out of managing alcohol intolerance. Your body will thank you every time you raise a glass.