Cinnamon

Cinnamomum verum

A warming, sweet bark that gently lowers blood sugar, stirs sluggish circulation, and fights microbes. Culinary use is exceptionally safe — therapeutic doses should favor Ceylon to avoid coumarin in cassia.

At a glance

Sweet, woody, and warming with hints of clove and citrus. Ceylon cinnamon is delicate and complex; cassia is bolder and more one-dimensional. The decoction glows reddish-amber and tastes of warm spice cake.

  • Daily blood-sugar smoothing on oatmeal, yogurt, or coffee
  • Warming tea for cold hands and sluggish circulation
  • Spiced chai for digestive comfort
  • Honey-cinnamon throat paste for colds
  • Anti-inflammatory golden-milk nightcap

Modern research

Tradition

Cinnamon's medicinal use is documented in Chinese texts from 2700 BCE and Sanskrit writings from 2000 BCE. TCM distinguishes rou gui (cassia bark, hot and acrid, warming kidney yang) from gui zhi (cassia twig, releasing the exterior). Ayurveda calls it tvak or dalchini and uses it to kindle digestive fire. The European spice trade made cinnamon valuable enough to drive the Portuguese and Dutch colonization of Ceylon, the home of true cinnamon.

Modern evidence

A 2019 meta-analysis of 18 RCTs (n=1,480) found 1–6 g/day of cinnamon reduced fasting glucose by ≈25 mg/dL and HbA1c by 0.40%, with stronger effects in trials lasting ≥12 weeks. A 16-week trial showed improvements across the full metabolic-syndrome panel. A double-blind RCT in PCOS showed improved insulin resistance and menstrual cyclicity. Antimicrobial activity against Candida and several bacterial strains is robust in vitro.

How to brew

Snap one Ceylon stick (or use 1 tsp ground) per 250 mL water and simmer covered for 10–15 minutes — bark needs longer extraction than leaves. Sticks can be re-simmered 2–3 times. For daily metabolic support, half to one teaspoon stirred into food often works as well as a dedicated brew.

Garden note

Cinnamomum verum is a tropical evergreen tree native to Sri Lanka. It needs warmth, humidity, and acidic soil — outside the tropics it can be grown as a greenhouse specimen. Bark harvest requires coppicing mature trees, so home production is ambitious; most herbalists buy quality sticks instead.