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Clove

Supplement botanical general nutrition
Aka: Syzygium aromaticum, eugenol
Brands seen in Singapore: Kroeger Herb Co, Nutricost, Oregon's Wild Harvest, Herb Pharm, Bioray
Not medical advice. Check with your doctor or pharmacist before you start, stop or change the timing of anything you take.
How to use
What it’s for
Kitchen spice, long medicinal use · gut data preclinical
Pros & cons
Pros
  • Rich in eugenol, eugenol acetate and gallic acid
  • Antioxidant activity above many fruits and spices
  • Clove compounds inhibited h. pylori in a lab dish
Cons
  • The gut work is in vitro and in rats, not people
  • SG bars ulcer and gastritis claims (table 6)
  • Study authors say further studies are required
Sources
  1. Clove (Syzygium aromaticum): a precious spice (Cortés-Rojas DF, de Souza CR, Oliveira WP; Asian Pac J Trop Biomed 2014; PMID 25182278) · read 2026-08-27
    what it says
    “This plant represents one of the richest source of phenolic compounds such as eugenol, eugenol acetate and gallic acid … The antioxidant and antimicrobial activity of clove is higher than many fruits, vegetables and other spices”
  2. A study on the antibacterial efficacy and action mechanism of clove against Helicobacter pylori (Kang X et al.; Front Pharmacol 2026; PMID 42199855) · read 2026-08-27
    what it says
    “kaempferol, quercetin, and stigmasterol inhibited H. pylori SS1, with MIC/MBC values of 0.5/1, 2.5/10, and 3.13/12.52 mg/mL … further studies are required to verify direct pathway regulation and in vivo antibacterial mechanisms”
  3. HSA Singapore — Health Supplements Guidelines (January 2026), Table 6: Examples of Diseases/Conditions/Disorders Not Allowed for Health Supplements · read 2026-08-27
    what it says
    “Digestive system — Ulcers, gastritis, hepatitis, liver cirrhosis, fatty liver, diarrhoea, constipation, inflammation of the intestines, liver or pancreas”
  4. HSA — Guidelines on Prohibited and Restricted Ingredients in Health Supplements and Traditional Medicines (Oct 2025), Annex A (118 rows, Abrus to Zinc) and Annex B (4 rows) — both searched, no row for this ingredient · read 2026-08-27
    what it says
    “The objective of this guideline is to highlight the substances of concern when used in HS and TM and is not meant to be an exhaustive list.”
  5. HSA Singapore — Health Supplements Guidelines (January 2026), clause 4.8 and Tables 4–5 (vitamins and minerals only) · read 2026-08-27
    what it says
    “HS for use by the general adult population should not contain vitamins and minerals exceeding the stipulated limits stated in Tables 4 and 5.”
  6. iHerb Singapore — Clove Supplements category page, default order (1 - 9 of 9 results); first 5 distinct brands: Kroeger Herb Co, Nutricost, Oregon's Wild Harvest, Herb Pharm, Bioray · read 2026-08-27
    what it says
    “Kroeger Herb Co, Fresh Ground Cloves … Nutricost, Clove … Oregon's Wild Harvest, Cloves … Herb Pharm, Clove … Bioray, Artemisia & Clove”
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Updated 2026-08-29. Every line above traces to a numbered source. Kozen-X is not a medical device and does not give medical advice. It lists what published sources have written down — nothing more. A pair not listed is unrecorded, not cleared. Before you start, stop or re-time anything, talk to your doctor or pharmacist.