Burnに含まれるカフェイン量はどれくらい？

A 250 ml can of Burn energy drink contains 80 mg of caffeine. That works out to a concentration of 32 mg per 100 ml, placing it in the moderate tier of the energy drink category. For perspective, this single serving delivers slightly less caffeine than a standard 240 ml cup of drip coffee, which averages 96 mg according to USDA FoodData Central data. The effect most people notice — a lift in alertness and a reduction in perceived fatigue — typically begins within 15 to 45 minutes of finishing the can, as the caffeine is rapidly absorbed through the gastrointestinal tract and reaches peak plasma concentration roughly 30 to 60 minutes after ingestion.

At 80 mg, the dose is identical to the original 250 ml Red Bull formulation, making it a familiar reference point for anyone who has used the category’s benchmark product. The European Food Safety Authority (EFSA) has concluded that a single 200 mg dose of caffeine does not raise safety concerns for healthy adults, so an 80 mg serving sits well inside that window. The primary drivers of the subjective experience are the rate at which the liquid is consumed and whether it is taken on an empty stomach, which can both accelerate absorption and sharpen the perceived peak. Because the total caffeine load is modest, the subsequent decline in energy is usually gradual rather than abrupt, provided the consumer is not already in a state of significant sleep debt.

Burnが体内にどれくらい残るか

Caffeine follows first-order elimination kinetics, meaning the body removes a constant fraction of the remaining dose per unit of time rather than a fixed number of milligrams per hour. Using the population-average half-life of 5.7 hours, the amount of caffeine still circulating after a single 80 mg Burn can be estimated with the formula remaining = 80 × 0.5^{(hours / 5.7)}. At the 3-hour mark, the calculation yields approximately 56 mg. By 6 hours, the figure falls to roughly 39 mg. At 9 hours, it drops to about 27 mg, and by 12 hours post-consumption, roughly 19 mg of the original dose remains pharmacologically active.

If someone drinks a Burn at 15:00, their bloodstream still carries around 39 mg of caffeine at 21:00 and approximately 19 mg at midnight. While 19 mg is a small absolute quantity — comparable to two-thirds of a 240 ml cup of green tea, which the USDA pegs at 28 mg — it is not zero. Research published in the Journal of Clinical Sleep Medicine by Drake and colleagues in 2013 demonstrated that a 400 mg dose taken six hours before bedtime still cost participants over an hour of objectively measured sleep. A residual 39 mg is an order of magnitude smaller, but for individuals with a genetically slow caffeine metabolism or high adenosine sensitivity, even that level can delay sleep onset or reduce deep-sleep duration. The caffeine half-life calculator lets users model the decay curve for this exact 80 mg dose against their own bedtime to see the projected residual.

With 80 mg of caffeine per can, a healthy adult could consume five 250 ml cans of Burn across a day and still remain at the 400 mg daily limit that the FDA and EFSA both identify as the threshold below which adverse effects are unlikely. That arithmetic — 5 × 80 = 400 — is mathematically clean, but it is not a consumption recommendation. The EFSA’s 2015 safety opinion also specifies that single doses should not exceed 200 mg for healthy adults, a ceiling that a single Burn can respects by a wide margin. The more practical constraint for most people is sleep. If bedtime is set at 23:00 and the goal is to have less than 20 mg of caffeine still circulating — a level low enough that most people do not experience measurable sleep disruption — the decay math suggests the last Burn should be finished no later than roughly 16:00. The latest cup before bedtime calculator lets users adjust that timing for their own sleep schedule and sensitivity.

Specific populations need to apply tighter guardrails. The EFSA advises that pregnant and breastfeeding women limit total daily caffeine intake to 200 mg, which means two 250 ml Burn cans would exhaust the entire day’s allowance with no room for any other source such as tea, chocolate, or medication. Adolescents are another group of concern; Health Canada’s 2017 systematic review recommended a maximum of 2.5 mg per kg of body weight per day for those aged 13 and older, which for a 50 kg teenager translates to 125 mg, or roughly one and a half cans of Burn. Individual sensitivity also varies substantially due to polymorphisms in the CYP1A2 gene that codes for the primary caffeine-metabolizing enzyme. People with the slow-metabolizer variant can experience a half-life of 8 hours or longer, which would leave approximately 44 mg still active at the 6-hour mark instead of the population-average 39 mg. For those individuals, the timing advice shifts earlier by at least an hour. The safe daily limit by body weight tool provides personalized thresholds based on these variables.

Within the energy drink category, an 80 mg Burn sits at the entry-level tier. It matches the 250 ml Red Bull exactly and delivers half the caffeine of a 473 ml can of Monster Energy or Rockstar, both of which contain 160 mg. The gap to the high-stimulant segment is even wider: a 473 ml can of Bang or Reign packs 300 mg, which is 3.75 times the Burn dose. A single 355 ml can of Celsius or Prime Energy, at 200 mg, contains two and a half times the caffeine of the 250 ml Burn. These comparisons matter because consumers often treat the entire category as interchangeable, when in reality the pharmacologically active dose can vary by nearly a factor of four between the mildest and strongest options. The side-by-side drink comparison tool makes these differences explicit across any pair of products in our dataset.

When measured against coffee, the Burn can is slightly weaker than a standard home-brewed cup. The USDA FoodData Central reference for drip coffee is 96 mg per 240 ml, which means the energy drink provides roughly 83% of that caffeine load. A single 30 ml espresso shot, at 63 mg, is closer to the Burn in absolute terms, though the espresso delivers its dose in a far smaller volume and is typically consumed more quickly. The practical takeaway is that switching from a morning coffee to a morning Burn results in a modest net reduction in caffeine intake, while switching from a Burn to a large energy drink like a 473 ml Monster represents a doubling. For a ranking of where this product falls across the full spectrum, the energy drink caffeine comparison chart provides a complete visual breakdown.

Burnの数値を左右する要素

Burn is distributed internationally by the Coca-Cola Company and appears in multiple formats and formulations across different markets, which means the 80 mg figure is a representative value rather than a universal constant. The most common variable is can size. In several European countries, the standard retail can is 250 ml, but 355 ml and 500 ml cans are sold in others, and those larger formats scale the caffeine content proportionally. A 500 ml can, for example, would deliver 160 mg of caffeine — twice the dose of the 250 ml version and equivalent in caffeine load to a 473 ml can of Monster Energy. The concentration of 32 mg per 100 ml is the stable number; the total dose shifts with the volume poured.

Flavor and formulation variants introduce additional complexity. Burn Original is the baseline product, but the brand also markets sugar-free versions, zero-calorie lines, and limited-edition flavor extensions such as tropical or citrus blends. In most cases, the caffeine content is held constant across the lineup so that the functional promise remains identical regardless of the sweetener system used. However, some regional formulations have historically included additional caffeine-containing botanicals like guarana extract, which can add a small supplementary dose that is not always fully declared on the front of the can. The EFSA has noted that guarana seeds contain approximately 4–5% caffeine by weight, so a formulation with a meaningful quantity of guarana extract could push the total methylxanthine load slightly above the labeled 80 mg.

There is no commercially available decaffeinated version of Burn. The brand’s identity is built on the energy proposition, and removing the caffeine would place the product in a different competitive segment altogether. For consumers seeking a caffeine-free alternative that mimics the sensory profile of an energy drink, the market offers options from brands documented in our caffeine-free energy drinks guide, but none carry the Burn trademark.

この数値の出典

The 80 mg value for a 250 ml can of Burn is drawn from the product labeling published by the Coca-Cola Company in European markets where the standard serving size is 250 ml, cross-referenced against third-party laboratory analyses archived in the open caffeine dataset that powers this site. Energy drink manufacturers are not required by law in most jurisdictions to list the exact milligram quantity on the can, and many do not, which is why the figure on this page comes from a combination of official corporate disclosures, import documentation, and independent verification. When a brand reformulates — as energy drink companies occasionally do when adjusting sweetener systems or preservative blends — the caffeine content can shift silently. Our dataset is updated whenever a verified change is documented, and the full change history is available in the open caffeine dataset.

Published values for the same product sometimes disagree across sources for legitimate reasons. A government food composition database might report a laboratory-analyzed mean from a sample of cans purchased in a single country in a specific year, while the manufacturer’s website might reflect a newer formulation that has not yet been captured by the database. Batch-to-batch variation in the caffeine content of the base extract can also introduce differences on the order of 5–10%, which is within normal manufacturing tolerances for a botanical ingredient. If a reader encounters a materially different number — say, 75 mg or 85 mg — from a credible source, we review it against our own records and update the page when the evidence warrants. The goal is not to claim a false precision but to provide the most accurate single-point estimate available at the time of publication, with full transparency about its limits.

結論

A standard 250 ml can of Burn energy drink contains 80 mg of caffeine, which is equal to the caffeine in a 250 ml Red Bull and slightly less than a 240 ml cup of drip coffee at 96 mg. The dose represents 20% of the 400 mg daily maximum recommended by the FDA and EFSA for healthy adults. At the population-average elimination half-life of 5.7 hours, the body retains roughly 39 mg at the 6-hour mark and 19 mg at 12 hours. For a 23:00 bedtime, finishing the can by 16:00 keeps the residual caffeine below a level likely to interfere with sleep for most people. Pregnant women, adolescents, and slow caffeine metabolizers should apply more conservative limits, and anyone tracking their intake precisely can use the site’s calculator tools to model the decay curve for their own physiology.