Botanical Overview
Psidium guajava, commonly known as guava leaf, is a member of the Myrtaceae family. It is native to tropical regions of the Americas and widely naturalized in Southeast Asia, India, and parts of Africa. Only the leaves (folia) are used medicinally, prized for their antimicrobial and anti-inflammatory properties. Common names include guava leaf and guava folia.
Energetics
In traditional energetics, guava leaf is considered cooling with a neutral moisture profile. It has astringent and bitter tastes and is tonifying to the qi. Directionality is not clearly established in available traditional sources.
Primary Actions
- Antimicrobial
- Anti-inflammatory
- Antidiarrheal
- Wound healing
Indications
Western
- Diarrhea
- Dysentery
- Gastrointestinal infections
- Inflammation
- Minor skin wounds
Syndromes
- Acute diarrhea
- Infectious diarrhea
- Inflammatory conditions
TCM
- Diarrhea
- Abdominal pain
- Dysentery-like symptoms
Syndromes
- Damp-heat in intestines
- Intestinal parasites
Ayurveda
- Diarrhea
- Dysentery
- Mouth ulcers
- Skin infections
Syndromes
- Pitta imbalance
- Ama accumulation
Unani
- Diarrhea
- Dysentery
- Infections
Syndromes
- Imbalanced humors causing diarrhea
Constituents & Mechanisms
The medicinal properties of guava leaf are attributed to its phytochemicals, including flavonoids, tannins, essential oils, polyphenols, and terpenoids. These compounds contribute antimicrobial, anti-inflammatory, and antioxidant effects.
Dosage & Preparations
- Infusion: 2-5 grams dried leaf in 150 ml water, taken 1-3 times daily
- Decoction: 2-4 grams leaf, twice daily
- Topical poultice for wound healing
Safety & Contraindications
Guava leaf is generally safe when used traditionally. Pregnant women should avoid usage due to insufficient safety data. Caution is advised with antidiabetic drugs, as guava leaf may lower blood sugar levels. No significant toxicity has been reported with standard use.
Astrological Correspondences
There are no well-supported planetary or elemental rulers established for Psidium guajava leaves in reputable esoteric traditions.
Selected References
- Psidium guajava (Guava) Monograph – Plants For A Future database
- WHO monographs on selected medicinal plants – Volume 2: Psidium guajava L. (World Health Organization, 1999)
- Phytochemical and pharmacological investigations on Psidium guajava leaves – Dhananjay S. Mehta et al., 2018