Low blood sugar levels, dehydration, or chemicals in processed foods, such as artificial flavorings, artificial coloring, and preservatives, may cause mood changes in some people.

低血糖水平、脱水或加工食品中的化学物质，如人工调味品、人工色素和防腐剂，可能会导致一些人的情绪变化。

The dyeing of Easter eggs in different colors is commonplace, with the color being achieved through boiling the egg in natural substances, oak or alder bark or walnut nutshell for black, beet juice for pink or using artificial colorings.

将复活节彩蛋染成不同颜色很常见，是通过在天然物质中煮鸡蛋来上色，黑色为橡木、桤木树皮或胡桃壳，粉红色为甜菜汁水或人工色素。