Organic Holy Basil Extract 15:1 High Strength 60 Pills

What Holy Basil Research Actually Shows, Plus a Safety Point Worth Adding

This organic, 15:1 concentrated holy basil (tulsi) extract is standardised to 2.5% ursolic acid, using CO2 and water extraction rather than alcohol-based methods. As covered in more detail in our adaptogen comparison guide, a well-known 2017 systematic review of 24 human studies found favourable evidence for holy basil’s traditional adaptogenic use, with some trials finding measurable cortisol changes.

This product’s own description mentions holy basil may “promote balanced blood sugar levels” — it’s important to add the safety point that follows from this: because holy basil is studied for effects on glucose metabolism alongside its stress-related research, it may genuinely influence blood glucose levels. If you’re diabetic or take blood sugar medication, it’s worth mentioning holy basil to your GP before regular use, since combining the two could affect your blood sugar control — this is a direct consequence of the same property being marketed as a benefit, not a separate, unrelated caution.

It’s also worth correcting a claim sometimes made about holy basil: while it has traditional use in respiratory contexts, it is not an established treatment for asthma, bronchitis, or any other diagnosed respiratory condition. Similarly, while holy basil is studied for cortisol regulation and general stress-related wellbeing, it isn’t an established treatment for diagnosed hormonal conditions — “supporting hormonal harmony” is best read as general stress-adaptation research rather than a specific hormonal treatment claim.

Holy basil is generally well tolerated, with mild digestive upset the most commonly reported effect. Pregnant or breastfeeding women should check with their GP before use, given limited safety data for these groups.

Sustainably sourced from India, manufactured to GMP standards in the UK, plant-based capsules. Take one capsule once or twice daily with water; 60 capsules provide a 1-2 month supply. Speak to your GP before use if you’re diabetic, take blood sugar medication, are pregnant or breastfeeding, or take other regular medication.

The Research Behind This Product