Herb Profile

Holy Basil / Tulsi Ocimum Tenuiflorum

Ocimum tenuiflorum

Holy basil is best framed for stress adaptation over time, not acute anxiety relief.

Last reviewed: 1 source citedReport a correctionProfile-wide ·B Moderate

Use extra caution Generally well tolerated; may lower blood sugar or blood pressure; caution with glucose lowering, antihypertensive, and anticoagulant medications; avoid pregnancy/breastfeeding unless clinician supervised. Details

Evidence
Moderate Evidence
Typical onset
Varies by prep
Safety rating
High caution
Best for
Stress Response, Oxidative Stress, Metabolic Health, Neurobiology
Avoid / review if
Diabetes (Monitor Glucose), Antidiabetic Drugs, Anticoagulants (Theoretical)
Holy Basil / Tulsi Ocimum Tenuiflorum monograph visual
The Hippie Scientist

At a glance

From this profile's structured data
Evidence
Grade B
Safety
Generally well tolerated; may lower blood sugar or blood pressure; caution with glucose-lowering, antihypertensive, and anticoagulant medications; avoid pregnancy/breastfeeding unless clinician-supervised.
Profile context
Stress Response, Oxidative Stress, Metabolic Health
Next steps

Continue reading

Safety

Safety & Cautions

Generally well tolerated; may lower blood sugar or blood pressure; caution with glucose lowering, antihypertensive, and anticoagulant medications; avoid pregnancy/breastfeeding unless clinician supervised.

High caution

Caution level: High. Multiple caution categories apply, or the record uses avoid/contraindication language.

  • Pregnancy/Breastfeeding CautionPregnancy or breastfeeding caution language is present.
Detailed safety fields

Pregnancy, breastfeeding, and contraindications

  • Diabetes (Monitor Glucose)
  • Antidiabetic Drugs
  • Anticoagulants (Theoretical)

Safety classifications

  • Pregnancy/Breastfeeding Caution: Pregnancy or breastfeeding caution language is present.

Full safety note

  • Generally well tolerated; may lower blood sugar or blood pressure; caution with glucose lowering, antihypertensive, and anticoagulant medications; avoid pregnancy/breastfeeding unless clinician supervised.

Safety labels

  • Pregnancy/Breastfeeding Caution

Evidence-based safety

Caution when combined

Severity and certainty are shown separately. A high-priority caution can still be theoretical: these pairings are screened from shared contraindication mechanisms and are not automatically documented clinical interactions. Provenance identifies the source fields that produced each flag; it does not upgrade the certainty of the pairwise claim.

High-Priority Caution

147 flagged pairings

Bleeding / anticoagulant risk

Moderate Caution

110 flagged pairings

Blood-sugar lowering

Evidence

Evidence Summary

Evidence lens

Useful signal, but study design, dose, and population still matter.

ModerateModerate Evidence

Human clinical evidence: Present in source signals

Mechanistic / preclinical: Mechanism mappedInflammatory Signaling Modulation · Oxidative Stress Modulation · Metabolic Regulation

Research maturity: Established researchLong Term Human Evidence May Be Limited.

Safety boundary: Safety note availableGenerally well tolerated; may lower blood sugar or blood pressure; caution with glucose lowering, antihypertensive, and anticoagulant medications; avoid pregnancy/breastfeeding unless clinician supervised.

This profile cites 1 human study.

Study design details
Evidence Grade

Grade B: Moderate Evidence

Evaluation of methodological rigor, population reach, and evidence alignment.

Design Match
Systematic review
Risk of Bias
Low
Consistency
Consistent
Strongest recorded design is a systematic review, drawn from 4 recorded studies, 3 in people. No disagreement is recorded across them.
How evidence grades work

Each grade reflects the strength and consistency of published human evidence — not marketing claims. Grades are based on study count, design quality, effect size, consistency, and recency.

Strong
Multiple RCTs, consistent direction, adequate effect size
Moderate
Some RCTs or consistent observational data in humans
Preliminary / Mixed
Animal or in-vitro only, or conflicting human data
Traditional / Theoretical
Traditional use only; no controlled human trials
Clinical Study Summaries (3)2 human evidence sources · 2 human trials · Participant totals not consistently reported · Consistency not yet classifiable

Filter by study class

Showing 3 of 3 studies.

What the evidence actually shows

This table contains 3 structured sources, including 2 human evidence sources; 2 are human trials. A reliable participant total cannot be calculated because sample size is not consistently structured in the cited sources. Source-to-conclusion relationships are not classified in this structured set, so consistency is not yet classifiable.

Profile-wide evidence grade: see the profile grade above · Confidence: not separately assigned

What would change our conclusion?

Larger, well-controlled human trials using comparable populations, doses, preparations, and clinically meaningful outcomes could materially strengthen or weaken this conclusion. Replication in a different population or a high-quality synthesis resolving current disagreement could also materially change confidence.

StudyDesignNDoseDurationPopulationOutcomeResult & magnitudeSource

A randomized, double-blind, placebo-controlled trial investigating the effects of an Ocimum tenuiflorum (Holy Basil) extract (HolixerTM) on stress, mood, and sleep in adults experiencing stress

Background
Randomized controlled trial

Randomly assigns participants to interventions or controls, reducing many sources of bias when the trial is conducted well.

Perceived stress and insomnia scores improved, with lower hair cortisol and stress-test responses reported versus placebo.PubMed

Effects of multi-herb and ashwagandha root formulas on stress modulation: a randomized, double-blind, placebo-controlled clinical study

Background
Randomized controlled trial

Randomly assigns participants to interventions or controls, reducing many sources of bias when the trial is conducted well.

Adds comparative randomized evidence for a multi-herb stress formula containing Rhodiola, holy basil, and Schisandra.PubMed

The Clinical Efficacy and Safety of Tulsi in Humans: A Systematic Review of the Literature

PubMed · Evid Based Complement Alternat Med · 2017

Background
Narrative review

Summarizes selected literature without the full prespecified search and selection methods of a systematic review.

PubMed

Dosing & Timing

Dose guidance
300 1,000 mg/day standardized extract; common trial range 500 600 mg twice daily
How Holy Basil / Tulsi Ocimum Tenuiflorum works

Simplified mechanism pathway based on preclinical and pharmacological evidence. Does not confirm clinical efficacy.

Mechanism Pathway — How Holy Basil / Tulsi Ocimum Tenuiflorum Works

How Holy Basil / Tulsi Ocimum Tenuiflorum WorksHoly Basil / Tulsi Ocimum Tenuiflorum acts on biological target pathways via anti inflammatory, leading to stress response.Holy Basil / Tulsi Ocimum TenuiflorumBiological TargetBiological pathwayAnti InflammatoryStress ResponseObservable outcomeAntioxidantParallel pathway
CompoundTarget / ReceptorMechanismEffect / Outcome
Mechanisms & biological pathways

Preclinical pathways. Proposed mechanisms from in vitro and animal research; these do not confirm clinical outcomes in humans.

  • Inflammatory Signaling Modulation
  • Oxidative Stress Modulation
  • Metabolic Regulation
  • Neurotransmitter Modulation
  • Hormonal Signaling Context
  • Stress Response Modulation
  • AMPK
  • Oxidative Stress
  • Neurotransmitter Signaling
  • Glucose Metabolism

Guides that use Holy Basil / Tulsi Ocimum Tenuiflorum

Compare & Sourcing

Compare side-by-side tradeoffs or verify active marker guidelines.

Sourcing options

Holy Basil (Tulsi) product picks

Recommendation status

Product recommendations are not shown for this profile because the current site safety and monetization policy does not permit them.

Product form & quality guidelines

When sourcing Holy Basil / Tulsi Ocimum Tenuiflorum, verify the label for:

  • Standardized extract: Confirm active content percentages on the supplement facts panel (e.g. standardized to specific marker compounds) rather than simple raw herb weights.
  • Third-party testing: Look for independent purity labels (USP, NSF, ConsumerLab, or Eurofins) to ensure the product is free from heavy metals, solvents, and contaminants.
  • Form bioavailability: Ensure the form matches evidence-supported configurations (e.g. standardized active extracts like bacosides, withanolides, or curcuminoids) for optimal onset and digestion tolerance.

Safety first · Harm reduction

This information is educational and not medical advice. Start low, avoid risky combinations, and consult a licensed clinician before making health decisions—especially if you use medications, have diagnosed conditions, or are pregnant/breastfeeding.

Learn how we evaluate confidence, safety, and intensity on the methodology page.

Editorial Review

Checked against primary sources, cited evidence, and contraindication language before publication. Evidence claims, safety language, and affiliate modules are reviewed independently. Not personal medical advice.

Editorial Standards →

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Botanical profile context

How to interpret Holy Basil / Tulsi Ocimum Tenuiflorum

Holy Basil / Tulsi herb profile with evidence context, key research topics, source notes, safety context, and references presented in an evidence-first… Use this herb profile as a starting point for evidence review, not as a recommendation to start a new supplement. Botanical products can vary by plant part, extract ratio, standardization, dose, and contaminant testing, so two labels with the same common name may not behave the same way.

When reviewing Holy Basil / Tulsi Ocimum Tenuiflorum, compare the traditional-use context against the human evidence, mechanism notes, and safety cautions. Pay special attention to pregnancy, breastfeeding, liver or kidney disease, blood-pressure effects, sedation, stimulation, anticoagulant use, antidepressants, and any prescription medication overlap.

For product decisions, prefer transparent labels, named extracts, clear serving sizes, and third-party quality testing. Avoid treating a long list of possible mechanisms as proof that an herb will solve a specific condition.