@mikxtr Attached here is some information from Cleveland Clinic, about low albumin, also called hypoalbumineria.

As a kidney disease patient, albumin for me is carefully monitored, as it indicates the level of blood plasma protein for me. I have to watch it carefully. Daily dialysis is a strain on my system, and the need for keeping good protein levels is critical. Eating a good healthy diet, that includes protein in appropriate quantities, helps.

Would you care to share what health issues you have? Low albumin can be contributed to several different health concerns, like liver or kidney issues, infections, stress, lupus, etc. You said you are of significant size, and I'm glad you are asking this question. Your primary care indicated malnutrition, but did he/she say anything else to ease your mind, like what to do now?
https://my.clevelandclinic.org/health/diseases/22529-hypoalbuminemia
Ginger