https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4296439/ – A review of 133 studies. Daily consumption of holy basil (Tulsi) is likened to liquid yoga. Scientific studies have shown it to possess anti-inflammatory, analgesic, antipyretic, antidiabetic, hepatoprotective, hypolipidemic, anti-stress, and immunomodulatory activities. 

Calming, clarity, relieving stress, anti-viral, anti-bacterial, anti-fungal, anti-inflammation (pain relief) Holy Basil, (Tulsi )has been found to protect organs and tissues against chemical stress from industrial pollutants and heavy metals, and physical stress from prolonged physical exertion, ischemia, physical restraint and exposure to cold and excessive noise. Tulsi has also been shown to counter metabolic stress through normalization of blood glucose, blood pressure and lipid levels, and psychological stress through positive effects on memory and cognitive function and through its anxiolytic anti-depressant properties. “Journal of Ayurveda & Integrative Medicine” 2014

Holy Basil is used to strengthen the respiratory system.  It is one of the main herbs for coughs and colds, especially asthma and bronchitis.

https://pubmed.ncbi.nlm.nih.gov/18492147/ – Anti-microbial, skin acne

https://pubmed.ncbi.nlm.nih.gov/8880292/ – A randomized placebo-controlled, single blind trial of Holy Basil in patients with noninsulin-dependent diabetes mellitus. (anti-diabetic) This study indicates that Holy Basil can be a useful adjunct for the treatment of type 2 diabetes.

https://pubmed.ncbi.nlm.nih.gov/23682780/ – Anti-cancer – Prevention & treatment of cancer

https://pubmed.ncbi.nlm.nih.gov/27072205/ – Helps protect the body from radiation poisoning & helps heal damage from radiation treatment. “2016 Journal of Cancer Research & Therapeutics”

https://www.tandfonline.com/doi/full/10.1080/01635581.2013.785012 – Holy basil leaves and extracts from other plants, proves to be nontoxic, easily available and have proven anticancer properties. “Nutrition & Cancer Journal”

https://pubmed.ncbi.nlm.nih.gov/21977056/ – Relieving stress – double blind placebo controlled study

https://pubmed.ncbi.nlm.nih.gov/28400848/ – Efficacy & Safety of Holy Basil – Systematic review in the literature. All studies reported favorable clinical outcomes with no studies reporting any significant adverse events. The reviewed studies reinforce traditional uses and suggest Holy Basil (tulsi) is an effective treatment for lifestyle-related chronic diseases including diabetes, metabolic syndrome, and psychological stress.

https://pubmed.ncbi.nlm.nih.gov/19253862/ Holy Basil reduced stress and anxiety, The trial showed Holy Basil reduced generalized anxiety disorders and its correlated stress and depression.

https://pubmed.ncbi.nlm.nih.gov/21812651/ – Improved cognition in rats with experimentally induced dementia

https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5376420/ – A systematic review of 99 studies with Holy Basil. The reviewed studies reinforce tulsi is an effective treatment for lifestyle-related chronic diseases including diabetes, metabolic syndrome,(heart tonic) and psychological stress. Tulsi has been the subject of numerous scientific studies and its pharmacological and wide range of therapeutic applications are the subject of more than one hundred publications during the last decade alone. Numerous in vitro and animal studies attest to tulsi leaf having potent pharmacological actions that include adaptogenic, metabolic, immunomodulatory, anticancer, anti-inflammatory, antioxidant, hepatoprotective, radioprotective, antimicrobial, and antidiabetic effects that have been extensively reviewed previously

https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3185238/ – Relieving stress

https://www.pharexmedics.com/studies/efficacy-of-an-extract-of-ocimum-tenuiflorum-holy-basil-in-the-management-of-general-stress-a-double-blind-placebo-controlled-study – stress management

https://pubmed.ncbi.nlm.nih.gov/11129737/ – One of the compounds in Holy Basil is Ursolic acid (a triterpenoid) which has been shown in studies to induce apoptosis (death) in cancer cells

https://pubmed.ncbi.nlm.nih.gov/10782484/ – anti-inflammatory, Pain-Relief (COX-2 inhibitation) The activities of compounds were comparable to ibuprofen, naproxen, and aspirin.

https://pubmed.ncbi.nlm.nih.gov/12597545/ – Holy Basil tea promotes even circulation & helps normalize blood pressure

http://www.webmedcentral.com/article_view/1046 – Bio-pharmacological activities of Holy Basil (Tulsi) (Ocimum sanctum)

https://pubmed.ncbi.nlm.nih.gov/26899341/ –  Effective in the management of stress effects, and anti-stress activity could be due to inhibition of cortisol release

https://pubmed.ncbi.nlm.nih.gov/26571987/ – In a placebo-controlled study, healthy adults who took Holy Basil daily had significant improvements over 30 days in cognitive function, cortisol levels, reaction time and error rates in tests and reduced anxiety.

https://pubmed.ncbi.nlm.nih.gov/21619917/ – Double-blinded randomized controlled trial for Immunomodulatory Effects of Tulsi (Holy Basil) (Ocimum santum) on Healthy Volunteers. Holy Basil taken over a month daily improved immune system

activity with significantly enhanced levels of interferon-y, IL-4, T-helper cells and NK cells compared to those who received a placebo.