With thanks to The Washington Post for this sentence.

Many of the changes in biomarkers occur at an earlier age but are similar to changes seen in adults in the broader population who develop Alzheimer’s later in life. 

How many commas should there be in the sentence above?

Laurie McGinley

https://www.washingtonpost.com/health/2022/04/07/down-syndrome-alzheimers-disease-aduhelm/