What were you triglycerides and ldl? without these it’s not a full panel and even then without particle size it’s still a bit limited. There is a huge thread by Bulkbiker explaining cholesterol and how most medics don’t really under it properly according to the latest research and findings.
a multi vitamin will do very little for b12 levels and even less for haemoglobin, a waste of money imo. The amounts are too small and the type used is usually cheap and least available forms for absorption. And for b12 especially once you start supplementing any blood test might show a rise for the next 4 months but it doesn’t necessarily mean it’s being absorbed and used properly. Active b12 is better but rarely done in the nhs. And unless you are avoiding animal products or have an known reason for low levels this needs to be identified or else you’re just filling a leaky bucket. Did they test ferritin or folate? This can be deficient even when haemoglobin is ok.
Do a bit of research of the various forms of b12 and the cofactors needed on their various forms (iron, folate, vitamin d, magnesium) as they all work together for both b12 and haemoglobin Levels.
well done on the great hba reduction