Green & true teas
Learn the six processing families and why all true tea contains caffeine.
Explore the guide ↗OngTeh 王茶 · A Singapore-born guide to tea and everyday wellness
Better days begin with a better cup.
Understand what you drink: tea, botanicals, caffeine and simple habits for everyday wellbeing. Explore the science, enjoy the ritual, and skip the miracle claims.
- Sleep & calming routines
- Digestion & ingredients
- Clear caffeine choices
Independent tea education · Sources linked throughout · Not a substitute for medical advice
An everyday ritual, explored with curiosity.
Tea, ingredients & evidence
Know what's in your cup.
Use our growing tea reference library to compare leaves, herbs, caffeine and traditional uses—then read what research supports and what remains unknown.
Evening & sleep
A cosy ritual is not a proven insomnia treatment. Understand the distinction.
Explore the guide ↗
Digestion & herbs
Ginger research, peppermint oil and brewed-leaf evidence are not identical.
Explore the guide ↗
101 teas to explore
Browse styles, origins, caffeine categories and cultural names in one place.
Explore the guide ↗Photography in this section is AI-generated editorial imagery; it illustrates tea rituals rather than identifying plants or documenting clinical effects.
Start with a real question
What would you like to understand about tea?
From a cup before bed to a ginger infusion after lunch, Tea Notes explains what research supports, what remains uncertain, and what to check before drinking.
Which tea is best before bed? A caffeine-first guide
Which tea should you drink before bed? Compare caffeine-free choices, chamomile evidence and a practical evening routine without sleep-cure promises.
Read the guideTea and digestion: what helps, what does not, and what to avoid
A practical digestion guide to ginger, peppermint tea, reflux and post-meal habits, separating clinical evidence from marketing claims.
Read the guideCaffeine-free, decaf and low caffeine: what the labels mean
Understand naturally caffeine-free infusions, decaffeinated tea, low-caffeine claims and how to check for hidden caffeine.
Read the guideIs green tea healthy? Benefits, limitations and caffeine
What green tea research suggests for health, why extract findings differ from a brewed cup and what caffeine-conscious readers should know.
Read the guideTea for stress and relaxation: the value of a quiet ritual
Explore calm tea rituals, caffeine-aware choices and why relaxing drinks should not be marketed as anxiety treatments.
Read the guideHerbal tea safety: medicines, allergies and hidden ingredients
A responsible herbal tea safety checklist covering allergies, drug interactions, pregnancy, concentrated extracts and ingredient labels.
Read the guideYour moment. Your cup.
Good tea belongs to the whole day.
DayClear-minded. Easy-going.
Tea moments that don't depend on a caffeine rush. Discover botanical infusions and carefully explained decaffeinated options.
NightUnwind. Settle in.
Quiet, naturally caffeine-free infusions designed around the evening ritual—not promises to treat stress or sleeplessness.
These guides discuss types of tea and ingredients, not personalised treatment plans. Always check the caffeine and ingredient list of any specific product.
A simpler way to start
Find your kind of cup.
No need to memorise tea names. Begin with a time of day, caffeine preference and flavour. Results are general ingredient ideas, not products for sale or medical recommendations.
Understand caffeine labelsFour principles
A clearer standard for a modern cup.
Simple does not mean ordinary. It means every ingredient, origin and choice has a reason to be there.
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Real tea first
Enjoyable leaves and botanicals, thoughtfully prepared and clearly explained.
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Nothing unnecessary
Additions should serve the cup—not disguise what is in it.
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Choices for the day
Caffeinated and caffeine-free directions for different moments and routines.
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Origins worth knowing
Stories of place, cultivar and craft made relevant rather than intimidating.
A world beyond one tradition
Every growing region has a story to pour.
Discover traditions and flavour profiles across tea-growing regions. Explore origin stories without needing to become an expert.
China
Rock, roast & floral lift
Oolong, black, white and fermented teas shaped by altitude, cultivar and centuries of craft.
Explore this origin story ↗ ThailandHighland character
Distinctive teas and botanicals from emerging growing regions, interpreted with care and context.
Explore this origin story ↗ JapanGreen, vivid & precise
Teas recognised for freshness, umami and disciplined processing—from everyday cups to refined grades.
Explore this origin story ↗ BeyondA changing world tea map
From South Asia to Africa and Southeast Asia, tea traditions provide wonderful stories about people, growing regions and preparation.
Explore this origin story ↗Made for people who read before they drink
Clarity is not a feature. It is the standard.
Many readers want useful tea information without elaborate wellness promises. OngTeh focuses on ingredients, traditions, caffeine and evidence in plain language.
- Unsweetened tea and infusions as everyday choices
- No unsupported wellness promises
- Caffeine-free options for different routines
- Clear ingredient and origin communication
The name behind the cup
Warm, memorable and unmistakably ours.
OngTeh brings together a sense of auspiciousness with the familiar Southeast Asian word for tea. The crowned cup keeps that idea welcoming: confident without becoming formal.
- Ong · 王
- Can evoke royalty, prosperity and auspiciousness.
- Teh · 茶
- Tea—simple, direct and familiar across Singapore.
Tea for every part of the day
From first light to late night.
From a morning tea to an evening botanical infusion, different drinking routines deserve clear choices.
Start gently
Caffeine-free drinks for a steady start, plus clearly explained decaf possibilities.
Keep it light
Refreshing tea moments, with lower-caffeine aims only when recipes can support them.
Make room for quiet
An unsweetened, caffeine-free alternative for conversations and slower hours.
Wind down
Botanical infusions without naturally occurring caffeine, built for an evening ritual.
Why OngTeh reads the research
Good tea guidance should be honest.
Tradition is not a clinical trial.
We enjoy classic tea rituals while making clear when a health claim lacks strong evidence.
Preparation matters.
Findings for capsules and extracts may not apply to an ordinary cup of tea.
Safety belongs in the story.
Caffeine, allergies, medicine interactions and pregnancy precautions deserve equal attention.
Responsible by design.
Tea can be enjoyable and part of a balanced lifestyle, but it should not be described as a cure for insomnia, anxiety, IBS or other conditions.
Our education separates evidence from tradition and highlights caffeine, interactions, allergies and other considerations.
Read the health information disclaimer