Cold brew coffee can raise cholesterol, but the deciding factor is not the cold water itself. It is whether the finished brew passes through a paper filter. Coffee contains oily compounds called cafestol and kahweol that are responsible for pushing up LDL cholesterol, and these compounds dissolve into any brew where ground coffee sits in prolonged contact with water without a paper barrier to trap them. Since most homemade cold brew is steeped in a jar or French press and strained through nothing more than a metal mesh, the drink often retains enough of those oils to matter for your lipid panel.
The Compounds Behind Coffee’s Cholesterol Effect
Cafestol and kahweol are diterpenes, a class of waxy molecules concentrated in the oil fraction of coffee beans. Cafestol is the more potent of the two. In a small crossover trial, volunteers given about 60 mg of pure cafestol per day for four weeks saw their total cholesterol rise by roughly 31 mg/dL and their LDL cholesterol climb by about 22 mg/dL. Their triglycerides also jumped. Adding kahweol on top of the cafestol nudged cholesterol slightly higher still, but the additional effect was modest compared to cafestol alone.1The American Journal of Clinical Nutrition. Effects of cafestol and kahweol from coffee grounds on serum lipids and serum liver enzymes in humans
The exact way cafestol raises cholesterol in humans is still debated. Early laboratory work in rat liver cells showed that cafestol powerfully suppresses the enzymes responsible for converting cholesterol into bile acids, essentially blocking one of the body’s main routes for clearing cholesterol from the blood.2PubMed. Cafestol, the cholesterol-raising factor in boiled coffee, suppresses bile acid synthesis by downregulation of cholesterol 7 alpha-hydroxylase and sterol 27-hydroxylase in rat hepatocytes However, a later human study actually found that coffee oil increased a plasma marker of bile acid synthesis rather than decreasing it, suggesting the rat-cell mechanism does not translate neatly to people.3The Journal of Nutrition. Coffee Oil Consumption Increases Plasma Levels of 7α-Hydroxy-4-cholesten-3-one in Humans Whatever the precise pathway, the cholesterol-raising effect in humans is well documented across multiple trials; the mechanism behind it is just less settled than the headlines imply.
Why Filtration Matters More Than Temperature
Paper filters physically trap coffee oils and the diterpenes dissolved in them. A classic experiment showed that running boiled coffee through a standard paper filter removed more than 80 percent of the lipid-soluble material responsible for raising cholesterol.4PubMed. The hypercholesterolaemic factor in boiled coffee is retained by a paper filter A more detailed analysis found that paper-filtered drip coffee retains a vanishingly small fraction of the original cafestol: the paper filter itself captures some, but the spent grounds absorb the lion’s share, with only about 0.15 percent of the bean’s total cafestol making it into the cup.5PubMed. Is cafestol retained on the paper filter in the preparation of filter coffee?
Metal mesh screens and cloth bags, by contrast, do almost nothing to stop diterpenes. They catch the coarse grounds but let the oils sail right through. That is why French press coffee, Scandinavian boiled coffee, and Turkish coffee are the traditional cholesterol villains: none uses a paper filter. Paper-filtered drip coffee sits at the opposite end, with cafestol concentrations typically well under 15 mg per liter. French press and boiled preparations can exceed 900 mg per liter, roughly a 60-fold difference.
Where Cold Brew Lands on the Spectrum
Cold brew is usually an immersion method: coarsely ground coffee steeps in room-temperature or cold water for anywhere from 12 to 24 hours. After steeping, most home brewers strain the slurry through the same coarse metal mesh used in a French press. Without a paper filter, the cold brew will carry its load of coffee oils into the glass.
One wrinkle that makes cold brew potentially worse than a quick French press is time. Longer contact between water and grounds gives the oils more opportunity to migrate into the liquid. A study comparing chromatographic profiles of various brews found that cold brew made under pressure (a method marketed as Hardtank) contained two to four times more total lipids than a conventionally steeped cold brew, and two to five times more than hot-brewed coffee.6Scientific Reports. Influence of coffee brewing methods on the chromatographic and spectroscopic profiles, antioxidant and sensory properties Even standard cold brew, though, carries more lipids than drip coffee, because there is no paper barrier and plenty of time for extraction.
If you pour your cold brew concentrate through a paper filter before drinking it, you strip out most of the diterpenes the same way a drip machine does. The temperature of the water does not determine how much cafestol ends up in your bloodstream; the filter does. A cold brew passed through paper is closer to drip coffee on the cholesterol spectrum. A cold brew strained through metal is closer to French press.
How Roast Level and Bean Variety Play In
Not all coffee beans deliver the same dose of diterpenes. Arabica beans contain both cafestol and kahweol in significant amounts; Robusta beans carry much less kahweol but have a unique compound called 16-O-methylcafestol instead. In a trial comparing the two, Arabica oil supplied roughly 72 mg of cafestol and 53 mg of kahweol per day, while Robusta oil provided about 40 mg of cafestol and only 2 mg of kahweol.7PubMed. Diterpene composition of oils from Arabica and Robusta coffee beans and their effects on serum lipids in man Since most specialty cold brew is made with Arabica beans, and since Arabica carries a higher total diterpene load, the typical cold brew drinker is getting the higher-risk bean.
Roast level also matters. Lighter roasts tend to yield more cafestol during extraction than dark roasts. Research measuring cafestol extraction across brewing methods found that the lightest roast in a French press setup had the highest extraction yield, around 6.5 percent of the available cafestol, while dark-roast preparations in other methods yielded closer to 2.5 percent.8Food Research International. Cafestol extraction yield from different coffee brew mechanisms Cold brew enthusiasts who favor lightly roasted single-origin beans and long steep times are, chemically speaking, optimizing for diterpene extraction.
The Enormous Variability in Real-World Cups
One reason blanket answers about coffee and cholesterol are tricky is the staggering range of diterpene concentrations found in actual cups of coffee. An analysis of different brewing procedures reported that total cafestol ester content ranged from as low as 1 mg/L in some filtered and instant brews to over 230 mg/L in others, with boiled coffee hitting the highest levels.9Springer Link (J Food Sci Technol). Variability of some diterpene esters in coffee beverages as influenced by brewing procedures That is a range spanning two orders of magnitude, which means your personal mug of cold brew could be anywhere on a very wide spectrum depending on your grind size, steep time, bean variety, roast level, coffee-to-water ratio, and whether you use any kind of paper filtration.
Cold brew concentrate, designed to be diluted before drinking, adds another layer of confusion. A concentrate may test high in diterpenes per milliliter, but if you dilute it three-to-one with water or milk, the per-serving dose drops substantially. Conversely, if you drink the concentrate straight (as some people do for an intense caffeine hit), the dose per cup could rival or exceed a French press serving.
Your Genetics Change the Equation
Even if two people drink the same cold brew, their cholesterol may respond differently. Researchers pooled data from nearly 400 subjects and found that the apolipoprotein E genotype, a well-known genetic variant that influences how your body handles dietary fats, modulated the LDL-cholesterol response to cafestol. People carrying the APOE4 variant actually showed a smaller LDL increase from cafestol than those with the more common APOE3/3 genotype, a difference of about 0.11 mmol/L in the opposite direction from what you might expect given that APOE4 carriers tend to have higher baseline cholesterol.10PubMed. Apoprotein E genotype and the response of serum cholesterol to dietary fat, cholesterol and cafestol The practical takeaway is that some people are more sensitive to coffee diterpenes than others, and you will not know which camp you fall into without tracking your own lipid numbers over time.
This also explains something that frustrates doctors: one patient switches from drip to cold brew and sees their cholesterol spike 20 points at the next blood draw, while another patient drinks a French press every morning for years with barely any change. The difference is partly genetic, partly dietary context, and partly the exact brewing setup. If your doctor has flagged rising cholesterol and you drink unfiltered coffee of any kind regularly, it is worth trying paper filtration for a few months and retesting.
Practical Steps to Lower the Risk
You do not have to give up cold brew to protect your cholesterol. A few simple adjustments can cut your diterpene exposure dramatically:
- Use a paper filter: After steeping, pour the concentrate through a standard cone or basket paper filter. This alone removes the vast majority of cafestol and kahweol from the finished drink.
- Dilute the concentrate: If you are making a strong concentrate, diluting it before drinking reduces the diterpene dose per cup proportionally.
- Choose darker roasts: Darker-roasted beans yield less cafestol during extraction than light roasts, all else being equal.
- Monitor your lipids: If you are a heavy cold brew drinker and have not had bloodwork done recently, get a lipid panel. Then consider changing your filtration method and retesting after two to three months to see if your numbers shift.
Coffee, Cholesterol, and the Bigger Cardiovascular Picture
Cholesterol is not the only thing coffee does to your cardiovascular system, and the net effect is less alarming than the diterpene story alone would suggest. A review of the evidence on coffee and heart disease concluded that moderate consumption, roughly two to three cups per day, is associated with reduced risk of coronary heart disease, heart failure, stroke, and even overall mortality, despite the potential to raise lipid levels in unfiltered preparations.11PubMed. Coffee and tea on cardiovascular disease prevention Coffee contains chlorogenic acids, polyphenols, and other bioactive compounds with anti-inflammatory and antioxidant properties that may offset the modest cholesterol bump.
A randomized crossover trial in people with hypertension who were already on blood pressure medication found that caffeinated coffee did temporarily raise blood pressure, but so did decaf and even water in similar amounts, and the differences between beverages were not significant.12PubMed. Acute Effects of Coffee Consumption on Blood Pressure and Endothelial Function in Individuals with Hypertension on Antihypertensive Drug Treatment: A Randomized Crossover Trial In other words, the acute blood pressure blip from a cup of coffee does not appear to be a major independent risk factor on top of whatever your medication already controls.
The tension in the evidence is genuine: coffee raises a known risk marker (LDL cholesterol, when unfiltered) while simultaneously being associated with lower rates of the diseases that marker is supposed to predict. That paradox probably comes down to the fact that LDL is one piece of cardiovascular risk, not the whole puzzle, and the other compounds in coffee pull in a protective direction. But if your LDL is already high, or you are on statins and struggling to hit a target number, drinking several cups of unfiltered cold brew each day could be working against you in a measurable way.
When Lab Numbers on Diterpenes Get Tricky
Researchers studying cafestol and kahweol in real-world brews face a surprisingly difficult analytical problem. These compounds are present in tiny amounts amid a soup of hundreds of other molecules, and different measurement techniques yield different results. Methods ranging from high-performance liquid chromatography paired with gas chromatography to nuclear magnetic resonance spectroscopy have been applied to the problem.13PubMed. Rapid analysis of cholesterol-elevating compounds in coffee brews by off-line high-performance liquid chromatography/high-resolution gas chromatography14Journal of Food Composition and Analysis. Cafestol and kahweol content in different specialty coffee brews: Exploration by NMR analysis and evaluation of brewing parameters One practical consequence is that the published cafestol numbers for “cold brew” in different papers may not be directly comparable, because the extraction and measurement protocols vary. That analytical scatter is part of why you see such wide ranges quoted for any given brewing method and why definitive statements about cold brew’s diterpene content are harder to pin down than you might expect.
This also means the precise cafestol concentration listed on a commercial cold brew label, if one appears at all, may not match what an independent lab would find. The commercial cold brew market has exploded in recent years, and some ready-to-drink brands filter their product through paper or fine cloth during manufacturing while others do not. Without standardized testing and labeling requirements for diterpene content, there is no easy way to compare brands on this metric. Your best proxy is to check the ingredients or production description for any mention of paper filtration. If it says nothing about filtration, assume the oils are still in the bottle.