"At Costco, salad is washed in a commercial-grade salad spinner. The salad is placed in the spinner and then rinsed with cold water. The spinner is then spun to remove any dirt or debris. The salad is then drained and ready to be served."
ChatGPT回答：It depends on the manufacturer, but pre-packaged salads are often washed before packaging to reduce the risk of foodborne illness. However, it is recommended to wash the greens again before consuming.
Google：If you've ever grown lettuce or been in a field of it, you know that greens grow pretty close to the ground, and they can have a hefty amount of dirt on them. So producers wash their greens before they bag them. "Many pre-cut, bagged, or packaged produce items are pre-washed and ready-to-eat," according to the FDA.
ChatGPT: Manufacturers typically wash pre-packaged salads in a combination of water and sanitizers to remove dirt and bacteria. The specific method may vary between manufacturers, but common techniques include soaking, rinsing, and spinning in a salad spinner. Some companies may also use specialized equipment or treatments such as ultraviolet light to enhance the cleaning process.
问：Do manufacturers wash pre-packaged salads using ultrasonic or megsonic?
ChatGPT： It's possible that some manufacturers may use ultrasonic or megasonic technology to wash pre-packaged salads. These methods use high frequency sound waves to create tiny bubbles that burst and remove dirt, bacteria, and other contaminants from the surface of the greens. However, not all manufacturers use these methods and traditional washing techniques such as soaking and rinsing with water and sanitizers are also commonly used.
几年前我启动减脂增肌计划以后，花了一年时间实现理想体重，就一直没有反弹。听了很多人对我说，“你好自制”。我老是纳闷，感觉没有什么地方需要用自制力的啊？好像自然就对高糖，高脂肪，加工食物没有什么依赖性了。当然每天吃的和以前是大不相同了。其中一个就是增加了深绿色的蔬菜，比如菠菜，羽衣甘蓝，瑞士甜菜，西兰花，黄瓜。那种新鲜的绿色看着就喜欢，吃着也爽。除了这些蔬菜纤维多，热量浓度低之外，今天又学到一个原理。这些绿色植物富含"The fat-blocking，appetite-suppressing effects of thylakoids" -类囊体是植物里负责光合反应的结构。这个成份在肠道里会结合lipase (脂肪酶），让脂肪吸收减缓，食物慢慢就挪腾到了小肠末端-末端回肠。人体太奇妙了，营养物质在这里被吸收，给大脑的信号是，你已经吃了很多了，营养足够了，然后大脑就告诉我们，饱了，不用再觅食了。有试验发现，餐前喝一杯菠菜汁，相对那些喝安慰剂的人在吃自助餐的时候少吃了100大卡。同时也发现刺激食欲的激素-grehlin的水平也低了。试验用的是蔬菜汁，因为这样好做类似的安慰剂。这和我自己的体验非常相似。我现在比起几年前吃得多了很多，无论是热量，种类，营养成份。但是很少感觉特别馋，吃大餐也不会过量。现在每天两顿都有绿色蔬菜。这些菜，只要简单炒，焯，蒸/煮就可以吃。稍稍加热后绿色更加深和亮，也是类囊体更多的表现。但是如果火候大了，颜色就浅了，那也是营养开始降低的表现。
我早已没有控制体重的需求，因为一切都已经成为常态。但是吃货本性难移，琢磨吃什么是每天最快乐的时光之一。今天特别想吃荠菜，可惜我们这里只有冷冻的，哪里的超市有荠菜卖，我就把那里当成我下一次搬家的目标之一。LOL
明显的脏东西。厂家应该还是洗过的，他们自有烘干/晾干的办法。一点灰尘之类的不可怕，碰上病毒和细菌如大肠杆菌才可怕。
"At Costco, salad is washed in a commercial-grade salad spinner. The salad is placed in the spinner and then rinsed with cold water. The spinner is then spun to remove any dirt or debris. The salad is then drained and ready to be served."
跟Aprilmei说的一样，估计各处都是这么洗的。Costco的Spring Mix 号称triple washed。 有人声称自己再手洗未必是好事。
问：Is salad washed before packaging?
ChatGPT回答：It depends on the manufacturer, but pre-packaged salads are often washed before packaging to reduce the risk of foodborne illness. However, it is recommended to wash the greens again before consuming.
Google：If you've ever grown lettuce or been in a field of it, you know that greens grow pretty close to the ground, and they can have a hefty amount of dirt on them. So producers wash their greens before they bag them. "Many pre-cut, bagged, or packaged produce items are pre-washed and ready-to-eat," according to the FDA.
问：How do manufacturers wash pre-packaged salads?
ChatGPT: Manufacturers typically wash pre-packaged salads in a combination of water and sanitizers to remove dirt and bacteria. The specific method may vary between manufacturers, but common techniques include soaking, rinsing, and spinning in a salad spinner. Some companies may also use specialized equipment or treatments such as ultraviolet light to enhance the cleaning process.
问：Do manufacturers wash pre-packaged salads using ultrasonic or megsonic?
ChatGPT： It's possible that some manufacturers may use ultrasonic or megasonic technology to wash pre-packaged salads. These methods use high frequency sound waves to create tiny bubbles that burst and remove dirt, bacteria, and other contaminants from the surface of the greens. However, not all manufacturers use these methods and traditional washing techniques such as soaking and rinsing with water and sanitizers are also commonly used.