What Cholesterol Is and Why the Balance Matters
Cholesterol is a fatty substance that is essential to normal body function — it is used to build cell membranes, produce hormones including sex hormones and vitamin D, and make bile acids needed for digestion. The body produces all the cholesterol it needs in the liver, and additional cholesterol enters the body through diet. The problem arises when there is too much of the wrong type in the blood. Low-density lipoprotein (LDL) — ‘bad cholesterol’ — deposits fat into the walls of arteries, building plaques that gradually narrow the vessel over decades. High-density lipoprotein (HDL) — ‘good cholesterol’ — carries fat away from the arteries to the liver for disposal. A pattern of high LDL and low HDL is a powerful driver of heart attack, stroke, and peripheral artery disease. Triglycerides — another type of fat in the blood — also contribute to cardiovascular risk when persistently elevated.
Why It Is Invisible Until It Is Not
High cholesterol has no symptoms. No headache, no fatigue, no sensation that anything is wrong. A person can have dangerously elevated cholesterol for 10 or 20 years, accumulating plaque in their coronary arteries, and feel completely healthy every single day — until the day a plaque ruptures and causes a heart attack or stroke. This is the story of countless Nigerians who had ‘no prior history’ of illness according to their families, who were active, eating well by their own estimation, and suddenly gone. The blood test that would have found the problem — a simple fasting lipid profile — is cheap, widely available, and requires nothing more than a small blood sample.
Risk Factors for High Cholesterol in Nigerian Adults
- A diet high in saturated fats — fatty cuts of meat, full-fat dairy, excessive use of palm oil in cooking
- A diet high in refined carbohydrates and sugar — white rice in very large portions, bread, fried snacks, soft drinks and malt — these raise triglycerides and lower good cholesterol
- Physical inactivity — exercise raises HDL (good cholesterol) and reduces LDL
- Being overweight or obese — particularly carrying excess weight around the abdomen
- Smoking — directly lowers good cholesterol
- Diabetes — associated with a characteristically unfavourable lipid profile
- Hypothyroidism (underactive thyroid) — a common condition in Nigerian women in particular — raises cholesterol
- Family history — some people inherit a tendency to produce very high levels of LDL regardless of diet, a condition called familial hypercholesterolaemia
What You Can Eat — and What to Reduce
Reducing cholesterol through diet does not require expensive or imported foods. Reducing the amount of palm oil used in daily cooking, choosing leaner cuts of meat, reducing the portion size of white rice, and replacing some starchy foods with beans, lentils, and more vegetables is both effective and affordable. Oats — eaten as oatmeal for breakfast — contain soluble fibre that specifically reduces LDL cholesterol. Whole grains generally are better choices than refined grains. Sardines and mackerel, eaten with their bones, provide both omega-3 fatty acids and calcium. Increasing vegetables — ugu, waterleaf, efo tete, bitter leaf, all the greens traditionally used in Nigerian cooking — is one of the most effective dietary changes for cardiovascular health. Reducing sugary drinks and replacing them with water is one of the single most impactful dietary changes for triglyceride levels.
How Doc on Wheels Can Help
A fasting cholesterol blood test can be arranged at your home through Doc on Wheels. Our doctors will explain your results — what each number means, whether it is a concern given your overall risk profile, and what steps to take. We can advise on dietary changes suited to what is actually available and affordable in your community, and refer you to the right specialist if needed.