What connects these conditions
Almost everything in this group traces back to the same place: how well your blood vessels
relax, and what is circulating through them.
Blood pressure, cholesterol, triglycerides and circulation are not four separate problems.
They are four readings from one system, which is why the same handful of changes improves all
of them at once.
The changes with the strongest evidence
- Sodium down, potassium up. Most people eat far more sodium than
potassium, and it should be the other way around. Fruit, vegetables and pulses are the fix
— not just eating less salt.
- Soluble fibre. Oats, barley, pulses and psyllium bind bile acids so your
liver pulls cholesterol out of circulation to replace them. This is a mechanical effect and it
shows up reliably in trials.
- Oily fish twice a week. The clearest effect is on triglycerides, where
omega-3 lowers them in a dose-dependent way.
- Replace saturated fat with unsaturated, do not just remove it. Swapping
butter for olive oil lowers LDL. Swapping butter for refined carbohydrate does not.
- Movement. Even brisk walking improves the flexibility of the artery wall
within weeks.
What the numbers actually mean
Blood pressure is two numbers: the pressure when the heart contracts and
when it rests. Both matter, and a single high reading means very little — readings vary
across the day and rise in a clinic.
Cholesterol is not one number. LDL carries cholesterol into artery walls;
HDL carries it away. Triglycerides are a separate fat that responds strongly to sugar,
alcohol and refined carbohydrate — often more strongly than to dietary fat.
Do not stop blood pressure or cholesterol medication because
your diet improved. These conditions are usually silent. Feeling fine is not evidence
that the numbers are fine. Any change to medication is a conversation with your doctor,
supported by a test.
This is information, not a diagnosis. These guides are written to help you understand what is happening and what to ask about. They do not replace seeing a doctor, and they are not a reason to stop or change any medication you have been prescribed.
Sources & further reading
The condition guides in this section cite their own peer-reviewed references. These are the general resources we work from.