The appropriate dose for an adult, including someone aged 65, depends on several factors, such as overall health, existing medical conditions (like liver or kidney disease), any other medications being taken (to avoid interactions), and individual response to treatment. Herbal formulations can have significant effects and may not be equally safe or effective for everyone. It is essential to consult your doctor or a qualified healthcare professional before using this product to determine the correct dose and ensure it is suitable and safe for you.