🏯Khmer Traditional Medicine

Cinnamon Bark (Khmer Krei)

Cinnamomum verum

About Cinnamon Bark (Khmer Krei)

Cinnamon Bark (Khmer Krei) (Cinnamomum verum) is a herb used in the Khmer Traditional Medicine tradition to help with Diabetes, Digestive Issues, Circulation, and Antimicrobial, among 1 other condition it addresses. The bark is the part traditionally used, taken internally.

Botanical background

Cinnamomum verum, called true cinnamon tree or Ceylon cinnamon tree is a small evergreen tree belonging to the family Lauraceae, native to Sri Lanka. Among other species, its inner bark is used to make cinnamon.

Source: Wikipedia, via iNaturalist

Parts used

Bark · internal
🫖

Decoction

1–2 cups daily
  • Add 1–2 tsp of dried Cinnamon Bark (Khmer Krei) to 2 cups of cold water.
  • Bring to a boil, then simmer for 15–20 minutes.
  • Strain and drink warm.
💧

Tincture

20–40 drops in water, 2–3× daily
  • Pack dried Cinnamon Bark (Khmer Krei) into a jar and cover with 40–60% alcohol.
  • Seal and steep for 4–6 weeks, shaking daily.
  • Strain and store in a dark dropper bottle.
💊

Powder / Capsule

500 mg – 1 g, 1–3× daily
  • Grind dried Cinnamon Bark (Khmer Krei) into a fine powder.
  • Fill size 00 capsules or stir into smoothies or honey.

Pregnancy, Breastfeeding & Children

Pregnancy

Use Caution

Culinary seasoning amounts (especially true Ceylon cinnamon) are considered safe; medicinal/concentrated doses of Cassia cinnamon are best limited due to coumarin content, which in large amounts may affect the liver and has a mild blood-thinning reputation.

Breastfeeding

Likely Safe

Normal culinary use is considered compatible with breastfeeding.

Children

Likely Safe

Culinary amounts are fine for children; avoid concentrated supplements and be aware Cassia cinnamon's coumarin content adds up with regular heavy use.

Contraindications

  • Pre-surgery — discontinue at least 2 weeks prior (potential antiplatelet effect)
  • Diabetes medications — may enhance hypoglycaemic effect; monitor blood glucose closely

Warnings

⛔ Diabetes Medications

May enhance the blood sugar–lowering effect of insulin or oral diabetes medications. Monitor blood glucose closely.

⛔ Heart & Blood Pressure Medications

May interact with antihypertensive drugs, blood thinners, or cardiac medications. Do not combine without medical guidance.

⚠️ Allergic Reactions

Discontinue immediately if you experience rash, itching, swelling, or difficulty breathing.

⚠️ Not Medical Advice

This information is for educational purposes only. Always consult a qualified healthcare provider before using herbal remedies.

Drug & herb interactions

Diabetes medications

Cassia cinnamon may lower blood sugar; monitor glucose closely with regular high-dose use.

Liver-metabolized medications

High-dose cassia cinnamon contains coumarin, a liver-stressing compound.

Where to find in nature

Native region

Various global regions

Climate

Varied

Habitat

Cultivated in traditional medicinal gardens, botanical gardens, and herb farms worldwide

🌿 To see Cinnamon Bark (Khmer Krei) growing, visit botanical gardens, university plant collections, or specialist herb nurseries near you. If foraging in the wild, always work with an expert identifier — never consume a plant you are not 100% certain of.

Where to buy

In store

  • Health food stores (Whole Foods, Natural Grocers, Holland & Barrett, GNC)
  • Naturopathic clinics and integrative medicine practices
  • Specialist herbal apothecaries and herbalist practices
  • Farmers markets with herb vendors

Online

iHerb

Wide selection of standardised extracts, capsules, and powders with lab testing

Mountain Rose Herbs

Premium bulk dried herbs — certified organic, ethically sourced

Starwest Botanicals

Large selection of certified organic bulk herbs and powders

Herb Pharm

High-quality liquid extracts and tinctures, rigorous quality standards

Amazon

Convenient — verify brand certifications and check third-party testing

Etsy

Small-batch artisan herbalists, hand-harvested and wildcrafted herbs

Quality tips

When buying Cinnamon Bark (Khmer Krei), look for: certified organic labelling, clearly stated country of origin, third-party lab testing for heavy metals and pesticides, and a batch expiry date. Standardised extracts offer consistent dosing; bulk dried herbs are more economical for regular use. Avoid very cheap, unlabelled products — quality varies enormously.