Your cholesterol changed - but you didn’t
Your rising cholesterol might be one of the first signs that things are changing in perimenopause.
Research published in 2025 (PMID: 39902165) supports something we often see in clinic: cholesterol can change across the menopause transition, even when diet and lifestyle haven't.
For many women, this is confusing and frustrating. They feel like they're doing all the right things, yet their cholesterol keeps creeping up.
The study found that small dense LDL, a type of LDL associated with greater cardiovascular risk, was significantly higher after menopause, independent of age. In other words, these changes may be related to the hormonal shift itself, rather than simply getting older.
So, what are hormones doing to our cholesterol?
Oestrogen plays a role in the way we metabolise fats and cholesterol.
As oestrogen declines, the liver's handling and clearance of LDL particles can change. At the same time, changes in insulin sensitivity and where we store body fat, particularly the tendency to accumulate more visceral fat around the abdomen, can influence triglycerides and the types of cholesterol particles circulating in the blood.
This doesn't mean every woman's cholesterol will suddenly become a problem after menopause.
But it does help explain why a woman who hasn't changed what she's eating or how she's exercising may suddenly see different numbers on her blood test.
Why does this matter?
Because if we identify these changes early, there's often a lot we can do.
Improving insulin sensitivity, maintaining muscle mass, reducing visceral fat where appropriate, increasing fibre intake, moving regularly and keeping blood pressure and triglycerides in check can all contribute to long-term cardiovascular health.
So if your cholesterol suddenly rises in your 40s or 50s and nothing else has changed, don't automatically assume you've done something wrong.
It may be another clue that your hormones are changing.
Look beyond total cholesterol
A standard lipid panel is a good starting point, but sometimes it's useful to look a little further.
ApoB gives us an indication of the number of atherogenic particles circulating in the blood and can add information that LDL cholesterol alone doesn't give us.
Lipoprotein(a), or Lp(a), is another cardiovascular risk marker that is largely genetically determined. It's not routinely included in a standard cholesterol test, and emerging research suggests levels may change across the menopausal transition in some women.
Depending on your overall risk, family history and results, there may also be a role for further cardiovascular assessment, such as a coronary artery calcium (CAC) score, something to discuss with your GP.
As oestrogen changes through menopause, it can influence the way our body manages cholesterol, as well as things like insulin sensitivity and where we store fat.
Understanding why these changes happen can make them feel a little less worrying and help us focus on the things we can influence.
Test, don’t guess.
Cholesterol is only one part of the midlife health picture.
I've put together a simple Midlife Blood Tests guide covering the tests I commonly recommend women discuss with their GP through perimenopause and menopause, including cholesterol, ApoB, Lp(a), blood sugar and insulin, thyroid, iron, vitamin D and more.
Bobbie X