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Rosemary

Supplement botanical brain & mood
Aka: Rosmarinus officinalis, carnosic acid
Brands seen in Singapore: Nature's Way, Swanson Vitamins, Solaray, Eclectic Herb, Nutricost
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
Cognition — pooled evidence is animal, human data acute
Pros & cons
Pros
  • 23 animal studies reviewed, 15 pooled for meta-analysis
  • 80 adults, one dose: small benefits on cognition tests
  • SAMe trial logged a cerebrovascular change as well
Cons
  • The pooled cognition evidence is in lab animals
  • The human trial was one 250 ml drink, not daily use
  • SG bars dementia and alzheimer's claims (table 6)
Sources
  1. Cognition enhancing effect of rosemary (Rosmarinus officinalis L.) in lab animal studies: a systematic review and meta-analysis (Hussain SM et al.; Braz J Med Biol Res 2022; PMID 35170682) · read 2026-08-27
    what it says
    “Twenty-three studies were selected for qualitative analysis and fifteen for meta-analysis … Effect sizes for intact and cognitively impaired animals were 1.19 (0.74, 1.64) and 0.57 (0.19, 0.96) … studies had a considerable amount of heterogeneity”
  2. Acute ingestion of rosemary water: Evidence of cognitive and cerebrovascular effects in healthy adults (Moss M, Smith E, Milner M, McCready J; J Psychopharmacol 2018; PMID 30318972) · read 2026-08-27
    what it says
    “Eighty healthy adults were randomly allocated to consume either 250 mL of rosemary water or plain mineral water … a number of statistically significant, small, beneficial effects of rosemary water on cognition”
  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
    “Brain and nervous system — Epilepsy, fits, paralysis, Alzheimer's disease, Parkinsonism, dementia, neuropathies, drug addictions, depression, eating disorders”
  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 — Rosemary Supplements category page, default order (1 - 6 of 6 results); first 5 distinct brands: Nature's Way, Swanson Vitamins, Solaray, Eclectic Herb, Nutricost · read 2026-08-27
    what it says
    “Nature's Way, Rosemary Leaf, 100 Vegan Capsules … Swanson Vitamins, Rosemary Extract, Standardized, 500 mg … Solaray, Vital Extracts, Rosemary … Eclectic Herb, Rosemary, 300 mg … Nutricost, Rosemary, 120 Capsules”
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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.