Fatty liver occurs when too much of fat builds up in liver cells. It is normal to have tiny amount of fat in these cells but if the percentage is more than 5% then, it is considered as fatty liver.
当过多的脂肪积聚在肝细胞时就会形成脂肪肝。这些肝细胞中含有微量脂肪是正常的，但是如果脂肪的百分比超过5%，则被认为是脂肪肝。

Non-alcoholic fatty liver (NAFL) is the initial, reversible stage of liver disease. Unfortunately, it often goes undiagnosed. NAFL is an umbrella term for a range of liver conditions affecting people who drink little to no alcohol at all. Over time, NAFL may lead to a more serious liver condition known as non-alcoholic steatohepatitis, or NASH.
非酒精性脂肪肝（NAFL）是初期且可逆行的肝脏疾病。不幸的是，它经常未被诊断出来。非酒精性脂肪肝是一系列肝脏疾病的总称。它会影响几乎不喝酒或根本不喝酒的人。跟着时间的推移，非酒精性脂肪肝可能会导致更严重的肝脏疾病，称为非酒精性脂肪性肝炎或NASH。

Meanwhile, alcoholic fatty liver disease is due to heavy alcohol use. Liver breaks down most of the alcohol drank, so it can be removed from the body. But the process of breaking it down can generate harmful substances. These substances can damage liver cells, promote inflammation, and weaken body’s natural defence. The more alcohol that you drink, the more you damage your liver. The next stages are alcoholic hepatitis and cirrhosis.
与此同时，酒精性脂肪肝则是由大量饮酒所致。肝脏会分解大部分所饮用的酒精，让酒精可以从体内排出。但是分解它的过程会产生有害物质。这些物质会损害肝细胞，导致炎症，进而削弱人体的自然防御功能。当您喝越多的酒，对肝脏的伤害就会越大。接下来就会导致酒精性肝炎和肝硬化。

What are the signs & symptoms?
迹象和症状

Both NAFL and alcoholic fatty liver disease are usually silent diseases with few or no symptoms. When it does, they may include:
非酒精性脂肪肝和酒精性脂肪肝通常都是无症状疾病。但是当它们发生时，就会有以下症状：

• Fatigue / 疲劳
• Pain or discomfort in the upper right abdomen / 右上腹部疼痛或不适

What are the causes?
造成脂肪肝的原因

There are several factors that may cause or contribute to developing fatty liver:
有几个因素可能会导致或促成脂肪肝的发展：

• Obesity / 肥胖
• Excess belly fat / 腹部脂肪过多
• Insulin resistance / 胰岛素抵抗
• High intake of refined carbs / 大量摄取精制碳水化合物
• Sugary beverage consumption / 大量摄取含糖饮料
• Impaired gut health / 肠道受损

How to improve fatty liver level?
如何改善脂肪肝水平？

• Lose weight / 减肥
• Reduce carbohydrate especially refined carbs / 减少摄取精制碳水化合物
• Increase fiber intake / 增加纤维摄取量
• Reduce consumption of saturated fat, avoid trans fat / 减少饱和脂肪的摄取，忌反式脂肪
• Avoid alcohol / 忌酒
• Exercise / 运动