Per 100 ml, most beer contains only about 0.0–0.5 g protein, with lager and stout usually near 0.3 g while some brands round down to 0 g.
Curious about the protein in your pint? Here’s the short version: beer has little protein. The tiny amount comes from barley and yeast residues that survive brewing and filtration. Across common brands and styles, data put protein around a few tenths of a gram per 100 ml. That means even a full 330 ml bottle rarely tops a gram. Below, you’ll see verified numbers, why labels sometimes disagree, and serving-size math you can use.
Beer Protein Content Per 100Ml — By Style And Brand
This section pulls together widely cited values from brand labels and nutrition databases. Where labels round to “0 g,” that usually reflects rounding rules, not absolute zero. Numbers refer to grams per 100 ml.
| Beer / Source | Protein (g/100 ml) | Notes |
|---|---|---|
| Heineken Original (official site) | 0.0 | Brand lists protein as 0 g per 100 ml due to rounding. |
| Guinness Draught (UK retail label) | 0.3 | Per 100 ml on pack; a typical stout value. |
| Lager, standard (UK nutrition table) | 0.3 | Generic lager figure per 100 ml. |
| Regular beer (USDA-derived) | 0.46 | USDA-based data per 100 g ≈ 100 ml. |
| Light beer (nutrition table) | 0.2 | Lean end of the range. |
| Heineken 0.0 (alcohol-free) | 0.0 | Lists 0 g protein per 100 ml. |
| Guinness 0.0 (alcohol-free) | 0.0–0.3 | Label values vary by market; often near 0.0–0.1 g. |
What Drives Protein In Beer?
Protein traces in beer come from grain proteins and peptides extracted during mashing. Filtration, finings, and cold conditioning drop most of these out. Style choice matters a bit: malt-forward ales and some unfiltered craft styles can sit at the higher end of the tiny range, while filtered macro lagers often round down to 0 g on labels. Alcohol-free beers can be similar or slightly lower, since recipes lean on dilution and different fermentations.
Why Labels Sometimes Say 0 g
Nutrition panels follow rounding rules. When measured protein per 100 ml is below the reporting threshold, brands print “0 g.” Analytical datasets that give more decimals, like USDA-based tables, still show a few tenths of a gram. Both are correct in context.
Protein In Beer Per 100 Ml: Style-By-Style Guide
Use this guide to compare common styles. It also explains how to turn the per-100 ml figure into per-serving numbers you can use day to day.
Standard Lagers
Most mainstream lagers sit near 0.3 g protein per 100 ml. That lines up with multiple UK nutrition tables and retailer labels. If a brand prints 0 g, it’s usually rounding. The carb line tends to sit around 3–3.5 g per 100 ml.
Stouts And Porters
Classic draught stout lands around 0.3 g per 100 ml on UK labels. Richer export stouts won’t shift protein much, since alcohol and residual carbs drive the differences more than protein.
Pale Ales, IPAs, And Unfiltered Styles
Hop-forward or unfiltered beers can carry slightly more suspended solids. In practice, protein still stays below 0.5 g per 100 ml. If haze is from proteins and polyphenols, it may nudge the number a little, but not enough to change diet math in any meaningful way.
Alcohol-Free Beers
Alcohol-free lagers often show 0 g per 100 ml for protein on labels, with carbs varying wider. A few list tiny protein amounts. Expect the same “almost none” picture.
Converting Per-100 ml To Real Servings
Here’s a quick way to convert. Multiply the per-100 ml protein by your serving size divided by 100. So if your beer is 0.3 g per 100 ml and you drink 330 ml, that’s 0.3 × 3.3 ≈ 1.0 g protein.
| Serving Size | Protein (g), Typical Range* | What This Assumes |
|---|---|---|
| 100 ml (reference) | 0.0–0.5 | From label and database values above. |
| 330 ml bottle | 0.0–1.7 | Multiply 100 ml range by 3.3. |
| 355 ml can (12 fl oz) | 0.0–1.8 | Multiply by 3.55. |
| 440 ml can | 0.0–2.2 | Multiply by 4.4. |
| 500 ml tall can | 0.0–2.5 | Multiply by 5.0. |
| 568 ml UK pint | 0.0–2.8 | Multiply by 5.68. |
*Range reflects “0.0 g” labels up to the highest common database value near 0.5 g per 100 ml.
How This Compares To Real Protein Foods
Even at the higher end, a full bottle of beer delivers about a gram of protein. That’s a tiny fraction of what you’d get from a glass of milk, a pot of yogurt, an egg, or a handful of nuts. Beer isn’t a protein source.
Why Different Sources Disagree
Several factors explain the spread between “0.0 g” and “0.46 g” per 100 ml:
Rounding And Label Rules
Manufacturers round per local labelling laws. In many markets, values under a threshold round to zero. That’s why big brands print 0 g for protein even when traces exist.
Recipe And Batch Differences
Protein traces depend on grain bill, mashing, and how much haze remains. A filtered lager can test lower than an unfiltered pale ale.
Measurement Basis
Some datasets report per 100 g; beer is close enough to water that 100 g ≈ 100 ml, but density, alcohol, and dissolved solids create small shifts. Databases also show more decimals than labels.
Trusted Sources You Can Check
You can verify the low protein picture in two places. First, the Heineken nutrition page lists 0 g protein per 100 ml for the flagship lager. Second, retailer labels for draught stout report about 0.3 g per 100 ml, as seen on Guinness Draught cans.
Practical Takeaways
- For macro brands, assume 0–0.3 g protein per 100 ml. That’s 0–1.0 g per 330 ml.
- If a label prints 0 g, treat it as “trace.” The difference won’t move your daily protein target.
- When tracking macros, put your attention on alcohol and carbs. Those drive beer’s energy more than protein.
- For exact numbers, check the brand’s own nutrition page or the retailer’s pack image for your region.
Common Clarifications
Does Brand Matter?
It changes the decimal place, not the story. Some labels show 0 g per 100 ml, others show 0.3–0.46 g. Both keep beer in the “trace protein” bucket.
Is Stout Higher Than Lager?
Often a touch higher on labels (around 0.3 g per 100 ml), but still tiny. Taste and body come from roasted malts and carbonation, not meaningful protein differences.
How Should I Log Beer In A Food Diary?
Log carbs and calories first. For protein, pick 0 g if the brand lists zero, or 0.3–0.5 g per 100 ml if your tracker uses a USDA-style entry. Both approaches are fine for day-to-day tracking.
Protein At 100 Ml In Context
When you search for beer protein content per 100ml, you’re really asking whether a drink can help your protein target. The answer is no. Beer is a carb-and-alcohol beverage with trace protein. If you want a sip that helps your macros, choose a protein shake, milk, or a snack with complete protein. The beer can still be part of a balanced plan; it just isn’t a protein play.
Method Notes
Values above combine brand-provided panels and reference databases. Because beer density sits close to water, per-100 g entries approximate per-100 ml. Small differences from alcohol and dissolved solids won’t change the takeaways today. Numbers rounded.
How To Read A Beer Label For Protein
Labels list nutrients per 100 ml in many markets. Scan the small table on the back: if protein shows “0 g,” read that as “trace.” If it shows 0.3 g, that aligns with generic lager and stout data. A useful cross-check is the public USDA-based beer entry, which reports about 0.5 g protein per 355 ml serving (≈0.14 g per 100 ml) and a composition of about 0.5% protein by weight. Numbers vary by recipe from the lab, so expect small swings.
Quick Calculation Examples
Example 1: 330 ml Lager At 0.3 g/100 ml
Multiply 0.3 by 3.3. That gives about 1.0 g protein for the bottle.
Example 2: 440 ml Stout At 0.3 g/100 ml
Multiply 0.3 by 4.4. That lands near 1.3 g protein for the can.
Example 3: Brand That Prints 0 g
Treat it as trace for tracking. If you prefer a number, log 0.1–0.3 g per 100 ml. That keeps you in line with databases and with how most brands present the data.
Protein Quality And Beer Myths
Protein quality depends on amino acid profile and digestibility. The traces in beer aren’t enough to matter for muscle repair or satiety. If you’re counting macros, meet your target with dairy, eggs, legumes, meat, fish, or fortified alternatives. Save beer for taste and social time, not protein intake.
Who This Guide Helps
People logging macros, athletes in a cutting phase, or anyone curious about nutrition labels often type “beer protein content per 100ml” in a tracker or search box. This page gives plain numbers and workable ranges so you can log a beer without overthinking it.
Region And Label Notes
Label formats differ by market. Some EU and UK panels show per 100 ml by default; U.S. brands may publish serving-based panels on brand sites or retailers. When you compare entries, match both the serving size and the decimals shown so you read the numbers on the same basis.
Bottom Line
The headline holds: beer carries trace protein per 100 ml. Across styles and brands, the band runs from 0.0 g on rounded labels to about 0.5 g in detailed tables. Plan your protein with real food; treat beer’s protein as a rounding error plainly.