In the realm of medicine, the pace at which advancements are made can be a delicate balance. Moving too quickly can lead to disastrous consequences, as seen in past scandals such as the thalidomide tragedy. However, moving too slowly can also have its pitfalls, as evidenced by the outdated use of the body mass index (BMI) as a measure of obesity.
For decades, the BMI has been the go-to tool for assessing weight status, despite its limitations in accurately distinguishing between fat and muscle or accounting for diversity in body types. This has resulted in millions of individuals being misclassified as overweight, leading to potentially harmful consequences such as being denied fertility treatment or certain surgeries.
Thankfully, there are better alternatives to the BMI that are finally gaining recognition. In a groundbreaking move, The Lancet and 75 international medical organisations have recommended that BMI alone should not be used to measure obesity. This shift marks a crucial step towards overcoming the inertia that has plagued the medical field, stemming from a lack of clear consensus, evidence, and leadership.
The success of the rapid development and deployment of COVID-19 vaccines serves as a shining example of what can be achieved through fast, safe, evidence-based action. This same approach is needed in addressing other areas of healthcare that have been stagnant, such as improving menopause care, developing new psychiatric treatments, expanding male contraception options, and creating novel antibiotics.
While caution is always warranted in the field of medicine, there is a pressing need to move swiftly and decisively in implementing necessary changes. By learning from past mistakes and embracing new evidence-based practices, we can propel healthcare forward and ensure better outcomes for all patients.

