Histamines in Wine: Understanding Intolerance

Histamines: The Overlooked Wine Culprit

When wine lovers experience flushing, headaches, nasal congestion, or digestive discomfort after a glass of red, they often blame Sulfites. But a growing body of evidence suggests that histamines — biogenic amines produced naturally during winemaking — may be a more significant and more common trigger for these symptoms.

Understanding histamine intolerance requires a small amount of biochemistry. The payoff is practical: knowing why you react and to which wines can significantly improve your experience.

Important: Histamine intolerance is a clinical diagnosis. If you suspect it, consult a doctor or allergist. Do not self-diagnose or self-treat serious symptoms.

What Are Histamines and Where Do They Come From?

Histamine (2-(4-imidazolyl)ethylamine) is a biogenic amine — a nitrogen-containing compound derived from an amino acid. In the body, histamine serves as a chemical messenger involved in immune responses, digestion, and neurotransmission. Externally, it is produced by bacteria that decarboxylate the amino acid histidine.

In wine, histamine is produced primarily by lactic acid bacteria (LAB) — the same bacteria responsible for malolactic fermentation (MLF), the process that converts sharp malic acid into softer lactic acid. When LAB break down histidine during MLF, they produce histamine as a byproduct.

Several factors influence how much histamine ends up in finished wine:

Malolactic fermentation: Wines that undergo MLF contain significantly more histamine than those that do not. Most red wines and many white wines undergo MLF; wines specifically made to avoid it (many crisp whites, wines stopped with sulfite addition before MLF completes) have lower levels.

Bacteria strains: Different LAB strains produce histamine at different rates. Oenococcus oeni, the most common MLF bacterium, is generally a low histamine producer. Some strains of Lactobacillus and Pediococcus produce far more.

Winemaking hygiene: High-hygiene operations with minimal bacterial populations beyond the selected MLF starter culture tend to produce lower-histamine wines.

Aging on lees: Extended aging on spent yeast cells and bacterial sediment can continue to develop histamine.

Aging in general: Histamine levels tend to increase as wine ages.

Histamine Levels in Wine: What the Research Shows

Published studies show considerable variation in wine histamine levels, and different regions and styles vary widely. General patterns from the research literature:

For context, other high-histamine foods: canned tuna (up to 100 mg/100g), hard cheese (up to 130 mg/100g), red wine typically contributes modest amounts per serving. The cumulative effect of consuming multiple high-histamine foods and wine together is what tends to trigger symptoms in sensitive individuals.

Bold Tanninic reds from Bordeaux and Bourgogne that have undergone extended MLF and aging often show higher histamine levels than fresh, unoaked whites. Pinot Noir from Bourgogne, despite being considered "gentle," commonly undergoes MLF and extended lees aging — both histamine-generating factors.

What Is Histamine Intolerance?

Histamine intolerance is not an allergy. It is a metabolic disorder characterized by a reduced ability to break down histamine, typically due to deficient activity of the enzyme diamine oxidase (DAO).

DAO is produced primarily in the intestinal mucosa and is responsible for metabolizing most dietary histamine before it enters the bloodstream. When DAO activity is insufficient, histamine from food and wine accumulates in the body and exerts its biological effects — vasodilation, increased vascular permeability, smooth muscle stimulation — at concentrations that would be harmless in a person with normal DAO levels.

Prevalence: Population studies suggest histamine intolerance affects approximately 1-3% of the general population, with women somewhat more commonly affected than men. These estimates are rough, as the condition is underdiagnosed and diagnostic criteria are not universally standardized.

Causes of reduced DAO activity: - Genetic variants affecting DAO production - Intestinal inflammation or damage (IBD, celiac disease) - Medications that inhibit DAO (some antidepressants, diuretics, NSAIDs) - High intake of DAO-blocking foods (alcohol itself is a DAO inhibitor)

Symptoms of Histamine Intolerance

Symptoms typically appear within 30-60 minutes of consuming histamine-rich foods or drinks and may include:

• Headache or migraine (often described as a pressing, throbbing quality)
• Facial flushing (redness, warmth, tingling)
• Nasal congestion or runny nose (rhinitis)
• Itching, hives, or skin redness
• Digestive symptoms: stomach cramping, nausea, diarrhea
• Heart palpitations or irregular heartbeat (in more significant exposures)

The overlap with wine allergy symptoms, sulfite sensitivity symptoms, and general alcohol intolerance makes differential diagnosis important.

How It Differs From Histamine Allergy

A true histamine "allergy" in the immunological sense does not exist — histamine is a body chemical, not an allergen in the classic sense. What exists is histamine intolerance (enzyme deficiency) and, separately, allergies to specific proteins in wine (glycoproteins from grapes or Fining agents like egg white or fish gelatin).

Wine protein allergy is a true IgE-mediated response. It can be tested with skin prick or blood tests. Histamine intolerance cannot be definitively tested with a single simple blood test — diagnosis involves clinical history, symptom pattern, response to a low-histamine diet trial, and sometimes DAO blood level measurement (though this correlates imperfectly with symptoms).

Other Biogenic Amines Alongside Histamine

Wine contains other biogenic amines that can compound histamine's effects or cause similar symptoms independently:

Tyramine: Also produced by bacterial decarboxylation of the amino acid tyrosine. Tyramine is specifically linked to migraine triggering. High-tyramine wines tend to correlate with high-histamine wines (same production conditions).

Putrescine: Enhances histamine absorption in the gut. Foods or wines high in putrescine can worsen histamine sensitivity even without directly causing symptoms themselves.

Phenylethylamine: Associated with migraine triggering, also found in chocolate and aged cheese — the classic migraine-trigger combination when consumed with red wine.

Lower-Histamine Wine Choices

For those with confirmed or suspected histamine intolerance, wine selection strategy matters.

Generally lower histamine: - Young, unoaked white wines that avoided MLF (Muscadet, young Sauvignon Blanc from Marlborough, many Rieslings) - Sparkling wines (secondary fermentation is distinct from MLF in most cases) - Wines made with careful bacterial management and lower MLF bacterial activity - Alsace whites (often partially or fully retaining acidity by limiting MLF)

Generally higher histamine: - Bold, aged red wines (Cabernet Sauvignon, Merlot, Pinot Noir — despite lighter body) - Wines that underwent extended MLF and barrel aging - Natural wines (minimal sulfite additions encourage more bacterial activity)

Ask your wine merchant: Some winemakers specifically market low-histamine wines. In Germany, Austria, and Switzerland, where awareness of histamine intolerance is higher, some producers label wines with histamine content or "low-histamine" designations.

Check whether wine underwent MLF: This is more commonly disclosed in winemaker notes and wine data sheets than on retail labels, but sommeliers and specialty retailers can often provide this information.

Management Strategies

For those with histamine intolerance:

Dietary trial: Reducing overall dietary histamine load — avoiding aged cheeses, cured meats, fermented foods, and vinegar alongside reducing wine — is often the most effective management approach.

DAO supplements: Enzyme supplements are available over the counter in some countries. Evidence for their effectiveness is preliminary; they may help some people but are not reliably effective for all. Discuss with a doctor before using.

Avoid DAO inhibitors with wine: Alcohol itself inhibits DAO, compounding the problem. Some antihistamine medications and common drugs (some NSAIDs, certain antidepressants) also inhibit DAO. Taking these with high-histamine foods worsens symptoms.

Antihistamines: Some people use antihistamines (H1 blockers like cetirizine or loratadine) prophylactically before drinking wine. This is not an endorsed medical strategy but is practiced by some. It does not address the underlying enzyme deficiency. Always consult a doctor before combining medications with alcohol.

Medical diagnosis: A clinical dietitian or allergist familiar with histamine intolerance can perform a structured evaluation, guide a low-histamine elimination diet, and help identify whether histamine intolerance is genuinely the issue. This is preferable to guessing based on self-reported symptoms.

Histamine intolerance is real, significantly underdiagnosed, and for those affected, knowing about it can transform their wine experience — moving from mystery suffering to informed, manageable choices.