Holy Basil

Sacred adaptogenic herb that reduces stress, supports respiratory health, balances blood sugar, and promotes overall wellness

Scientific nameOcimum tenuiflorum FormulaComplex eugenol and ursolic acid Molecular weightVariable bioactive compounds g/mol CASVarious natural compounds

70 absorption score

7 safety / 10

25 USD per month

5 documented interactions

Check it against something

Evidence level C

Holy Basil with:

75 out of 100

Works better together Compatible. Timing differs, so follow each supplement's own window.

Check it against your whole stack →

What it does

mechanism and evidence for each claim

Stress reduction and cortisol balance

Reduces stress levels and helps balance cortisol production

Adaptogens modulate HPA axis and stress hormone response Evidence C-grade 2-6 weeks

Blood sugar regulation support

Helps maintain healthy blood glucose levels

Compounds improve glucose metabolism and insulin sensitivity Evidence C-grade 4-8 weeks

Respiratory health and lung support

Supports respiratory function and lung health

Anti-inflammatory and bronchodilatory effects Evidence C-grade 2-6 weeks

Immune system modulation

Supports balanced immune function and response

Immunomodulatory compounds enhance immune balance Evidence C-grade 3-8 weeks

Antioxidant and anti-inflammatory effects

Provides antioxidant protection and reduces inflammation

Eugenol and other compounds neutralize free radicals Evidence B-grade 2-4 weeks

Others take these for the same thing

Same goal, different mechanism — check any of them against this one

Melatonin Sleep support & circadian rhythm 0.5-3mg A 50% Ashwagandha Stress management & energy 300-600mg A 75% Magnesium Glycinate Superior absorption sleep & muscle support 200-600 mg A 90% Vitamin B12 (Cyanocobalamin) Energy & nerve support 250-1000 mcg A 70% Coenzyme Q10 (CoQ10) Heart health & cellular energy 100-200mg A 10% Phosphorus Bone health & energy metabolism 700-1250mg A 80%

Every pair we checked

12 combinations scored by the engine

Holy Basil + Caffeine May counteract calming and stress-reducing benefits Needs attention 61

Holy Basil + Creatine Monohydrate No documented interaction either way No known interaction 70

Holy Basil + Calcium Carbonate No documented interaction either way No known interaction 70

Holy Basil + Whey Protein No documented interaction either way No known interaction 70

Holy Basil + Lactase No documented interaction either way No known interaction 70

Holy Basil + Bovine Collagen No documented interaction either way No known interaction 70

Holy Basil + DHA No documented interaction either way No known interaction 70

Holy Basil + Turmeric No documented interaction either way No known interaction 70

Holy Basil + Fish Oil (EPA/DHA) No documented interaction either way No known interaction 70

Holy Basil + Ashwagandha Enhanced adaptogenic and stress-reducing benefits Works better together 75

Holy Basil + Chromium GTF Enhanced blood sugar control and insulin sensitivity Works better together 75

Holy Basil + Vitamin D3 Enhanced antioxidant and immune benefits Works better together 75

Dosage

With meals

Daily300-600mg

Stress management300-600mg daily

Blood sugar support300-600mg daily

Respiratory health300-600mg daily

General wellness300-600mg daily

Before you take it

VeganYes

When to expect it

First Effects2-4 weeks for stress and respiratory benefits

Peak Benefits6-12 weeks for sustained adaptogenic and metabolic benefits

Deficiency DevelopmentReturn to baseline stress and metabolic function

Toxicity OnsetRare, mainly with very high doses

How to measure it

$100-200

MarkerCortisol levels, blood glucose, HbA1c, or stress markers

OptimalBalanced cortisol, stable glucose, reduced stress markers

Deficient belowNot applicable for supplement

FrequencyMonitor stress and glucose markers as needed

What actually reaches you

The label counts the carrier, your body does not

Absorption High 70 of 100 · absorbs well relative to other forms

Delivered daily 315 mg

Cost per 100 mg delivered $0.26 comparative — uses the absorption score, not a measured percentage

Works better with

3 documented

Ashwagandha

Enhanced adaptogenic and stress-reducing benefits

Complementary adaptogens with overlapping stress pathways · level C

Chromium

Enhanced blood sugar control and insulin sensitivity

Both support glucose metabolism through different pathways · level C

Vitamin C

Enhanced antioxidant and immune benefits

Complementary antioxidant and immune-supporting effects · level C

What not to take with Holy Basil

2 documented

Stimulants Caffeine

May counteract calming and stress-reducing benefits

Stimulants oppose relaxation and stress reduction · minor significance

High Sugar Diet

High sugar intake may overwhelm blood sugar benefits

Excess glucose reduces effectiveness of glucose regulation · moderate significance

Medication interactions

Discuss these with a pharmacist before combining

diabetes-medications Moderate

May enhance blood sugar lowering effects

What to do: Monitor blood glucose closely

blood-thinners Minor

May enhance anticoagulant effects

What to do: Monitor bleeding parameters

fertility-medications Moderate

May interfere with fertility treatments

What to do: Avoid during fertility treatments

Available forms

bioavailability compared

Standardized Holy Basil Extract 75

Whole Leaf Extract 70

Fresh Herb Tea 50

Dried Herb Powder 60

Standardized Holy Basil Extract: Standardized potency, Higher concentration, Research backed, Consistent effects

Whole Leaf Extract: Complete spectrum, Traditional form, Multiple compounds, More affordable

Fresh Herb Tea: Traditional preparation, Very affordable, Pleasant taste, Cultural practice

Dried Herb Powder: Traditional form, Complete spectrum, Lower cost, Versatile use

Food sources

before you supplement

Fresh holy basil leaves Traditional tea preparation · 45

Holy basil extract supplements 300-600mg per capsule · 70-75

Holy basil tea Lower concentration · 50

Holy basil powder Variable concentration · 60

Too little

deficiency signs

Not essential - but symptoms addressed by holy basil:
Chronic stress and elevated cortisol
Blood sugar dysregulation and insulin resistance
Respiratory problems and lung inflammation
Immune dysfunction and frequent infections
High oxidative stress and inflammation
Poor stress adaptation and resilience

Too much

toxicity signs

Generally safe but potential concerns:
Hypoglycemia with diabetes medications
Increased bleeding with blood thinners
Possible reproductive effects
Generally well tolerated

Who benefits most

stress-anxiety-management

Effective adaptogen for stress reduction and calm energy

300-600mg daily

blood-sugar-diabetes-support

May help maintain healthy blood glucose levels

300-600mg daily

respiratory-lung-health

Supports respiratory function and lung health

300-600mg daily

immune-system-balance

Helps modulate and balance immune function

300-600mg daily

antioxidant-anti-aging

Provides antioxidant protection and anti-inflammatory benefits

300-600mg daily

Where to buy it

compare forms first

Look for Holy Basil at 300-600mg per serving. The form that matters here is Standardized Holy Basil Extract.

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What else affects it

Beyond other supplements

High sugar diet

High sugar intake may overwhelm blood sugar benefits

Excess glucose reduces effectiveness of glucose regulation

How it works

Adaptogens modulate HPA axis reducing cortisol and stress response
Eugenol and compounds improve glucose metabolism and insulin function
Anti-inflammatory effects reduce respiratory inflammation
Immunomodulatory compounds balance immune system activity
Antioxidants neutralize free radicals and reduce oxidative stress
Supports healthy liver function and detoxification

Key findings

what the evidence supports

Promising evidence for stress reduction and blood sugar support
Good antioxidant and anti-inflammatory effects
Limited high-quality human clinical trials
Generally safe but monitor blood sugar and bleeding with medications

Sources: NIH Examine.com · data reviewed 2026-08-01

Compiled by Denis, who maintains this database and holds no medical qualification — every figure here is sourced or derived, never asserted. How we calculate it →

Common questions

What are the benefits of Holy Basil?

Documented effects: Stress reduction and cortisol balance; Blood sugar regulation support; Respiratory health and lung support; Immune system modulation. Reduces stress levels and helps balance cortisol production

How much Holy Basil should you take per day?

The common daily range is 300-600mg. By goal — stress management: 300-600mg daily; blood sugar support: 300-600mg daily; respiratory health: 300-600mg daily; general wellness: 300-600mg daily.

When is the best time to take Holy Basil?

With meals. First effects are typically reported within 2-4 weeks for stress and respiratory benefits.

What are the side effects of Holy Basil?

At excessive doses: Generally safe but potential concerns:, Hypoglycemia with diabetes medications, Increased bleeding with blood thinners, Possible reproductive effects, Generally well tolerated. Safety rating at normal doses is 7 out of 10.

What should you not take with Holy Basil?

Separate it from Stimulants Caffeine, High Sugar Diet by two to four hours. May counteract calming and stress-reducing benefits

Does Holy Basil interact with medications?

Documented interactions with diabetes-medications, blood-thinners, fertility-medications. Discuss these with a pharmacist before combining.

How do you know if you need Holy Basil?

The marker is Cortisol levels, blood glucose, HbA1c, or stress markers, optimal range Balanced cortisol, stable glucose, reduced stress markers. Common deficiency signs: Not essential - but symptoms addressed by holy basil:, Chronic stress and elevated cortisol, Blood sugar dysregulation and insulin resistance, Respiratory problems and lung inflammation.

Taken for

28 Sleep & Stress

Melatonin · Magnesium Glycinate · Ashwagandha

62 Energy & Metabolism

Vitamin B12 (Methylcobalamin) · Ashwagandha · Vitamin B12 (Cyanocobalamin)