A label-first guide to Ocimum tenuiflorum, 5:1 extract math, human stress research, realistic expectations, and Canadian safety wording.

What is holy basil?

Holy basil is the common English name for Ocimum tenuiflorum, a plant also called tulsi, sacred basil, or Rama tulsi. It is not the same thing as the sweet basil commonly used in pesto. In supplement research and regulation, the species, plant part, and preparation matter: leaf is not automatically interchangeable with whole plant, seed, tea, fresh juice, powder, or a branded standardized extract.

Biogénique’s current licence identifies the medicinal ingredient as Ocimum tenuiflorum leaf. Each vegetarian capsule contains 500 mg of a dry 5:1 extract, with a dried herb equivalent—often shortened to QCE—of 2,500 mg. Hypromellose is the only non-medicinal ingredient listed in Health Canada’s live record.

What does a 5:1 extract mean?

A 5:1 ratio means that five parts of dried starting herb were used to produce one part of extract, by weight under the product’s documented process. For this formula, 500 mg of extract corresponds to a 2,500 mg dried-leaf equivalent: 500 × 5 = 2,500. That is a quantity relationship, not proof that the capsule is five times stronger in the body or five times more effective than another product.

Extract ratios also do not make unlike preparations interchangeable. A 5:1 non-standardized leaf extract is not automatically equivalent to a hydroalcoholic extract standardized to a named phytochemical complex, even if the capsule weights look similar. The most defensible comparison uses the same species, part, solvent or preparation, extract ratio, standardization, dose, and study population.

What is Biogénique Holy Basil licensed to do?

Health Canada’s live licence for NPN 80132451 authorizes several use areas. The product provides antioxidants. It is used in Herbal Medicine as an adaptogen to help increase energy and resistance to stress in cases of mental and physical fatigue related to stress. It is also traditionally used in Ayurveda to help relieve cough, colds, and respiratory mucus buildup; as a cardiotonic; and to aid digestion and stimulate appetite.

Those categories should not be blended into larger promises. The adaptogen claim does not mean the product treats an anxiety disorder, burnout, depression, insomnia, or adrenal disease. The respiratory language is explicitly traditional; it is not a claim to prevent infection or ‘boost immunity.’ The cardiotonic language is also a traditional Ayurvedic use, not evidence that the product treats heart disease or controls blood pressure.

Does holy basil help with stress?

The best recent human trial is encouraging, but it studied a different extract. In 2022, Lopresti and colleagues randomized 100 adults aged 18–65 who reported persistent stress and sleep problems to eight weeks of a branded hydroalcoholic Holy Basil extract or placebo. The intervention provided 125 mg twice daily—250 mg per day—and was standardized to at least 5% of a proprietary Ocimum bioactive complex.[1]

Compared with placebo, the extract produced a larger improvement on the Perceived Stress Scale. The published model reported a significant time-by-group interaction (p = 0.003); among the 85 participants who completed the questionnaires, average PSS scores fell 37% in the extract group and 19% in the placebo group. The study also reported lower stress responses during a laboratory stress test and lower end-of-study hair cortisol in the treatment group.

The limitations change how that result should be used. Fifteen participants withdrew. Hair cortisol was not measured at baseline, and the authors noted uncertainty about translating hair length into timing. The sleep findings were stronger on self-report than on the wearable device. The extract was phytochemically standardized in a way Biogénique’s licence does not claim, and the study was funded by the ingredient supplier; the authors disclosed the relationship.[1]

What did earlier research find?

A 2012 randomized, double-blind, placebo-controlled study enrolled 150 adults with general stress symptoms. Participants received placebo or 1,200 mg per day of OciBest, a whole-plant extract, for six weeks. The extract group reported greater improvement in the total symptom score and in selected items such as frequent exhaustion, forgetfulness, sleep problems, and recent sexual problems. The article reported no adverse events.[2]

Again, the preparation mismatch is substantial: whole-plant OciBest at 1,200 mg per day is not this 500 mg 5:1 leaf extract. The symptom scale also bundled many outcomes, so it should not be used to promise a specific result for focus, libido, fatigue, or sleep.

A 2017 systematic review identified 24 human tulsi studies covering metabolic, immune, and neurocognitive outcomes. The review found generally favourable signals but also important weaknesses: only eight studies included a placebo, just three were rated high quality on the Jadad scale, most were short, and many did not adequately describe the cultivar, preparation, dose form, or quality controls. The authors concluded that more rigorous trials with standardized formulas, larger samples, and longer follow-up were needed.[3]

Can holy basil improve sleep, calm, focus, or cortisol?

These are research questions, not interchangeable product claims. In the 2022 trial, self-reported insomnia scores improved more with the branded extract than with placebo, but between-group changes in total sleep time and sleep efficiency measured by Fitbit were not significant. Other mood questionnaires also did not show consistent between-group differences. That is not enough to call Holy Basil a sleeping pill or a treatment for insomnia.[1]

The same discipline applies to calm, focus, and cortisol. Older studies have explored stress symptoms, attention, and anxiety, while the newer trial measured salivary and hair cortisol. Those findings can be described with the tested preparation and limitations. They should not be compressed into storefront promises such as ‘lowers cortisol,’ ‘improves focus,’ or ‘relieves anxiety’ for every holy basil capsule.

What is the recommended holy basil dosage?

For Biogénique Holy Basil, the licensed direction is simple: adults 18 years and older take one capsule once daily. That provides 500 mg of the 5:1 dry leaf extract, equivalent to 2,500 mg of dried leaf. The live licence does not require a direction to take it with food and does not state a maximum duration of use.

Do not raise the dose to imitate a study. The 2022 trial used 250 mg per day of a different, phytochemically standardized extract; the 2012 trial used 1,200 mg per day of a different whole-plant product. Milligrams do not establish equivalence when the plant part, solvent, ratio, and standardization differ.

How long does holy basil take to work?

The product licence does not promise a time to result. Health Canada’s February 2026 Holy Basil leaf monograph describes the adaptogen use as helping increase energy and resistance to stress ‘over time,’ while the human trials above lasted six or eight weeks. That does not mean every user should expect a noticeable effect by week six, or that no earlier change is possible. It means the evidence does not support an instant-effect promise or a universal deadline.

A sensible routine is to follow the label consistently, avoid changing several stress or sleep products at once, and reassess whether the goal and response are clear. Persistent fatigue, sleep disruption, mood symptoms, chest symptoms, or unexplained appetite or weight changes deserve proper clinical evaluation rather than repeated supplement escalation.

Who should not take it—or should check first?

The current licence says not to use this product during pregnancy. Ask a health care professional before use if you are breastfeeding, have a heart condition or diabetes, or take heart or blood-pressure medication. Consult a professional if symptoms persist or worsen.

These cautions are especially important because the clinical literature is not a substitute for medication review. Do not use Holy Basil to adjust glucose, blood pressure, cardiac medication, or treatment for an anxiety or sleep disorder. A pharmacist or prescribing clinician can assess the full combination of medicines, natural health products, and health conditions.

What does the finished-product COA show?

Biogénique’s reviewed Drive records include a finished-product certificate of analysis for lot 022519, manufactured in February 2025 with an expiry of January 2028. It identifies the same 500 mg, 5:1 Ocimum tenuiflorum leaf formula and hypromellose capsule. The certificate reports a nine-minute disintegration result, 607.32 mg average fill/capsule weight against its stated range, compliant microbial results, and finished-product heavy-metal results below the listed specifications.

That evidence applies to lot 022519. The storefront does not expose the lot currently shipping, so the certificate should not be presented as proof for every bottle without matching the lot and expiry. A transparent quality claim names the exact finished product, lot, test, method, specification, result, approval date, and whether the consumer’s bottle matches.

How to choose a holy basil supplement

1. Verify the NPN and compare the live licensed ingredient, dose, uses, and warnings with the physical label.

2. Confirm the species and plant part. Ocimum tenuiflorum leaf should not be substituted silently with another basil species or whole-plant preparation.

3. Read the extract ratio as a manufacturing quantity relationship—not a multiplier of clinical effectiveness.

4. Treat study results as preparation-specific. Match extract type and standardization before comparing milligrams.

5. Ask for a finished-product COA matched to the lot and expiry when making batch-level purity or potency decisions.

A simple decision framework

Frequently asked questions

Is holy basil the same as tulsi?

Yes, tulsi is a common name for Ocimum tenuiflorum, also called Holy Basil or sacred basil. It is distinct from the culinary sweet basil species commonly used in food.

What does 5:1 extract mean?

It means five parts of dried leaf were used to produce one part of extract. In this product, 500 mg of extract corresponds to a 2,500 mg dried-leaf equivalent. It does not mean five times the absorption or five times the effect.

What is the Biogénique Holy Basil dosage?

Adults 18+ take one capsule once daily. Follow the current physical label and recheck Health Canada’s live NPN record if the packaging changes.

Is holy basil good for anxiety?

Some small human studies have explored anxiety or stress symptoms, but Holy Basil is not licensed here to treat an anxiety disorder. Seek professional assessment for persistent or impairing anxiety, and do not replace established care with a supplement.

Does holy basil help sleep?

One 2022 trial of a branded standardized extract improved self-reported insomnia scores, while objective wearable sleep outcomes were not consistently different from placebo. Sleep is not an authorized outcome claim for this exact product.

Does holy basil lower cortisol?

A 2022 trial reported lower end-of-study hair cortisol and a lower salivary stress response with a different standardized extract. The hair measure lacked a baseline sample and the formula did not match this product. Do not turn that result into a universal ‘cortisol-lowering’ claim.

Can I take holy basil with blood-pressure or heart medication?

Ask a health care professional first. Heart and blood-pressure medicines are specifically named in the licensed cautions, as are heart conditions and diabetes.

Can I take holy basil during pregnancy or breastfeeding?

Do not use it during pregnancy. Ask a health care professional before use if you are breastfeeding.

Bottom line

Biogénique Holy Basil is a clearly identified 500 mg dry 5:1 Ocimum tenuiflorum leaf extract, equivalent to 2,500 mg of dried leaf and licensed for adults at one capsule daily. Its strongest public position is the current Canadian adaptogen claim, antioxidant role, and named traditional Ayurvedic uses. Human stress trials are encouraging, but they tested different extracts and do not justify promises about sleep, anxiety, focus, cortisol, immunity, glucose, or blood pressure for this exact formula. Follow the label, respect the pregnancy and medication cautions, and match any quality certificate to the bottle’s lot before relying on batch-level claims.

Related resources

Holy Basil product page · Review the current formula, 30-/90-count availability, and NPN.

Ashwagandha benefits guide · Compare another adaptogen without transferring evidence between formulas.

Quality Control · Learn how Biogénique describes its quality process.

Find My Formula · Explore a more personalized starting point.

Evidence & compliance note

Licensed product facts were verified against Health Canada’s live LNHPD record for NPN 80132451, the February 27, 2026 Holy Basil leaf monograph, current internal SKU documents, finished-product COA lot 022519, and the live product page. Scientific findings are reported by preparation, standardization, dose, population, and study limits; they are not treated as direct efficacy proof for this exact formula. The COA is not presented as the current storefront lot.

References

1. Lopresti AL, Smith SJ, Metse AP, Drummond PD. A randomized, double-blind, placebo-controlled trial investigating a Holy Basil extract on stress, mood, and sleep. Front Nutr. 2022;9:965130. PMID 36185698.

2. Saxena RC, et al. Efficacy of an extract of Ocimum tenuiflorum (OciBest) in the management of general stress: a double-blind, placebo-controlled study. Evid Based Complement Alternat Med. 2012;2012:894509. PMID 21977056.

3. Jamshidi N, Cohen MM. The clinical efficacy and safety of tulsi in humans: a systematic review of the literature. Evid Based Complement Alternat Med. 2017;2017:9217567. PMID 28400848.

4. Health Canada. Licensed Natural Health Products Database: NPN 80132451; Holy Basil – Ocimum tenuiflorum – Leaf monograph, revised February 27, 2026.

Disclaimer

This article is for educational purposes only and is not a substitute for medical advice, diagnosis, or treatment. Natural health products are not risk-free. Read and follow the product label. Do not use this product during pregnancy. Consult a qualified health care professional before use if breastfeeding, if you have a heart condition or diabetes, or if you take heart or blood-pressure medication; seek advice if symptoms persist or worsen.