Coffee Knowledge
Latest articles, industry insights and brewing guides
World’s Weirdest Coffee Drinks You’ve Never Tried
From edible cups to butter-infused brews, here are the strangest coffee drinks around the globe — ranked and explained.
Can Coffee Help Relieve Dry Eye Syndrome?
Recent research suggests caffeine may ease dry eye symptoms. Here’s what studies say about coffee’s surprising role in eye health.
Who Should Avoid Coffee? 5 Key Drinking Tips
Learn when not to drink coffee, how to taste it properly, and why fresh milk and filtered brews matter for health and flavor.
Australian Café Bans Loud Children, Sparks Debate
A Newcastle café in Australia bans noisy kids after customer complaints. Here’s what the owner said and why the policy sparked outrage online.
Why Technique Alone Isn’t Enough to Be a Great Barista
Becoming a skilled barista requires more than just technical know-how. Taste training, sensory discipline, and deep coffee knowledge are equally essential.
Why Your Siphon Coffee Forms a Hill — And What That Means
The height and shape of the coffee 'hill' in siphon brewing affects flow rate and extraction. Here’s how to get even, balanced results.
What Is Coffee Body and How to Taste It
Learn how to identify and assess coffee body by observing how it behaves—like forming water beads—and understand what creates that rich mouthfeel.
How Dark Is a Black Pearl Espresso Roast?
A roast-to-black espresso still delivers bright fruit notes. We compare shots from a normal, second crack-start, and full second crack roast.
How Water Temperature and Pouring Technique Shape Pour-Over Flavor
Learn how water temperature, pour speed, and agitation control extraction to highlight sweetness, acidity, or bitterness in your pour-over coffee.
What Is Coffee Oil in Espresso and How Does It Form?
Espresso typically has crema, but under the right conditions, true coffee oil can emerge. Here’s how it happens and what it means.
Why Too Fine Grind Hurts Bloom-First Pour Over
A finer grind isn’t always better for hand pour. Blooming first? Keep grind medium—too fine causes channeling and extraction imbalance.
Why That Classic Pour-Over Mantra Isn’t Actually Useful
The well-known pour-over mantra 'from heart to water' sounds poetic but offers little practical brewing guidance. Here’s what really matters.
How Dosing Mechanism Bias Affects Espresso Grind Distribution
A dosing chamber’s swing arm can cause uneven espresso puck density by biasing grinds leftward. Removing the spring may improve distribution.
Does Coffee Cause Hair Loss? What Science Says
No strong evidence links moderate coffee intake to hair loss. In fact, caffeine may help hair growth—but not by drinking it.
Does Coffee Cause Constipation? The Truth About Caffeine and Bowel Movements
Drinking coffee, especially black and on an empty stomach, can stimulate bowel movements. But for long-term laxative users, coffee may worsen constipation.
How Coffee Affects Heart Health: What Science Says
Coffee doesn’t harm your heart—studies show regular intake is safe, even for people with hypertension or mild heart risks.
Why Boiler Water from Espresso Machines Is Unsafe to Drink
Repeatedly boiling boiler water in espresso machines produces harmful nitrosamines. Avoid drinking or cooking with it for health and machine care.
Women and Coffee: Real Health Benefits and Risks
Learn whether daily coffee is safe for women, how it aids fitness, and its surprising effects on romance and aging.
When to Drink Coffee Without Losing Sleep
To avoid sleep disruption, stop drinking coffee by early afternoon. Caffeine’s half-life is ~5 hours, so aim to finish your last cup by 2 PM.
Does Coffee Cause Breast Shrinkage in Women?
Drinking more than three cups of coffee daily may reduce breast size in women with a specific gene, Swedish research suggests.