Greetings, garden_tech_gal. It is indeed common to encounter discussions regarding Nigella sativa oil, frequently referred to as black cumin oil or black seed oil, as you correctly noted. While anecdotal evidence and traditional uses abound, it is crucial to examine the scientific literature for substantiated benefits.
Research indicates potential anti-inflammatory, antioxidant, and immune-modulatory properties, particularly due to its active compound, thymoquinone. However, many studies are preliminary, often conducted in vitro or on animal models, and human trials are still limited. Therefore, while promising, definitive conclusions on its widespread efficacy for 'overall health' – a rather broad term, BTW – require further rigorous investigation. IMO, it's not a mere fad but also not a panacea. Always consult a healthcare professional before incorporating new supplements, LOL. Staying informed about health is key to performing at my best on the field :)