About decaf
Decaf isn’t “coffee minus fun.” It’s coffee minus (almost all) caffeine. How the caffeine leaves the bean is where it gets interesting.
How the processes work
| Process | How it works | Solvent? |
|---|---|---|
| Swiss Water® | Green beans soak in a caffeine-free “green coffee extract.” Caffeine migrates out and is caught by carbon filters; flavor compounds stay. Swiss Water says it removes 99.9% of caffeine. [Swiss Water] | No |
| Mountain Water | A similar water-and-filtration method run by Descamex in Mexico, using water from Pico de Orizaba. | No |
| Sugarcane / EA | Beans are steamed and washed with ethyl acetate (EA), here made from fermented sugarcane, which dissolves caffeine. Common for Colombian decafs; often adds a sweet, fruity note. | Yes — a naturally derived solvent |
| CO₂ | Pressurized (supercritical) carbon dioxide acts as the solvent and selectively pulls caffeine. Used at industrial scale; leaves no chemical residue. | No (CO₂ only) |
| Methylene chloride | The “European” or “KVW” method: beans are exposed to methylene chloride, which binds caffeine, then steamed to drive off the solvent. FDA allows residues up to 10 ppm in decaf coffee. [21 CFR 173.255] | Yes |
Our “solvent-free” flag = Swiss Water, Mountain Water or CO₂. Sugarcane/EA is marked not solvent-free because EA is a solvent, even a natural one.
Why drink decaf?
- Sleep & jitters. FDA cites 400 mg/day of caffeine as an amount not generally associated with negative effects for healthy adults — some people are far more sensitive. Decaf lets you keep the ritual. [FDA]
- Decaf isn’t zero. Same FDA page: an 8 oz cup of decaf typically has about 2–15 mg of caffeine.
- Health associations hold for decaf too. A large BMJ umbrella review (2017) found coffee consumption — including decaf — associated with lower all-cause mortality. [Poole et al., BMJ 2017] A UK Biobank cohort also found inverse associations with mortality for decaf drinkers. [Loftfield et al., JAMA Intern Med 2018] These are observational associations, not proof of cause.
FDA status of methylene chloride (as of Oct 15, 2026)
In December 2023, the Environmental Defense Fund and other groups petitioned FDA (FAP 4A4839) to remove methylene chloride and three other solvents from the food additive regulations under the Delaney Clause. FDA reopened the comment period on May 28, 2026 (91 FR 31681); it closed June 29, 2026. The petition is listed as “under review” — no decision has been published. Methylene chloride decaf remains legal in the US, with the 10 ppm residue limit. [FDA petition status] [Daily Coffee News]