Egg yolks have long been viewed with caution due to their cholesterol content, historically linked to increased heart disease risk. However, modern research has reshaped this narrative. According to a study published in MDPI, consuming whole eggs, including the yolk, does not significantly raise blood cholesterol levels in most people. In fact, egg yolks are a rich source of essential nutrients such as vitamins A, D, E, and B12, along with healthy fats, choline, and antioxidants like lutein and zeaxanthin. These components support brain, eye, and heart health, making egg yolks a valuable part of a balanced diet.
Understanding how eating egg yolks influences cholesterol levels
It’s a common belief that egg yolks raise cholesterol, but research suggests the relationship isn’t that straightforward.

• Dietary vs blood cholesterol: For most healthy individuals, dietary cholesterol (the kind found in egg yolks) has little effect on blood cholesterol. Instead, saturated and trans fats in the overall diet play a more significant role in raising LDL ("bad") cholesterol.
• HDL boost: Some studies even show that moderate egg consumption can increase HDL ("good") cholesterol, helping improve the balance between LDL and HDL.

So, in general, eating eggs in moderation is unlikely to harm cholesterol levels, and may even support heart health in certain populations.
Do eggs increase the risk of heart disease
Research shows that eggs affect heart disease risk factors in several ways. According to Harvard Health, consuming one to two whole eggs per day generally does not raise cholesterol levels or negatively impact heart health. This includes total cholesterol, LDL cholesterol, and blood sugar control, even among people who are overweight or living with obesity.
Eggs in low-carb diets

Eggs are a staple in low-carbohydrate diets, such as the ketogenic diet, which have been shown to improve markers of metabolic health. For individuals with insulin resistance or type 2 diabetes, these diets may help improve LDL particle size and increase HDL levels, both of which are favourable for heart health.
Eggs and inflammation

Eggs also contain anti-inflammatory nutrients like choline and antioxidants, which can help reduce inflammation, another factor in heart disease. This further supports their inclusion in a heart-healthy diet when consumed in moderation.
Nutritional benefits of egg yolks
Egg yolks are nutritional powerhouses packed with essential nutrients:

• Vitamins A, D, E, and K: These fat-soluble vitamins support vision, immune function, bone health, and antioxidant protection.
• B vitamins: Including B12, riboflavin, and folate, which are important for energy production and brain health.
• Choline: A key nutrient for brain development and liver function, often lacking in modern diets.
• Lutein and zeaxanthin: Antioxidants known to protect eye health and reduce inflammation.
• High-quality protein: Combined with healthy fats, egg yolks provide satiety and sustained energy.

Egg yolks support satiety
When eaten with the white, egg yolks contribute to a feeling of fullness, making them a great option for weight management. Including eggs in breakfast, for example, can help reduce calorie intake later in the day.
Eating the whole egg allows you to benefit from these nutrients, especially when included as part of a balanced meal.
Who should be careful with egg yolks
While egg yolks are generally safe, there are exceptions:

• People with familial hypercholesterolaemia or other genetic conditions may absorb cholesterol more aggressively and should limit their dietary sources, such as yolks.
• “Hyper-responders” experience increased LDL levels after eating cholesterol-rich foods. Although rare, they may benefit from reducing egg yolk consumption.
• Individuals with diabetes or cardiovascular disease: Some studies link high egg intake to elevated heart disease risk in this group. It’s best to consult a healthcare provider.
• People consuming a high-saturated-fat diet: Combining eggs with processed meats and fried foods raises overall cardiovascular risk, not the egg yolk itself.

Disclaimer: This article is for informational purposes only and is not intended as medical advice. Always consult a qualified healthcare professional before making any changes to your diet or health routine, especially if you have existing medical conditions or concerns about cholesterol and heart health
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