Green for a healthy diet

I love...

Iceberg lettuce

One cup of iceberg lettuce:
* 8 calories
* 0.5 gram protein
* 0.7 gram fiber
* 10 mg calcium
* 78 mg potassium
* 1.5 mg vitamin C
* 16 mcg folate
* 13.3 mcg of vitamin K
* 164 mcg beta carotene
* 152 mcg of lutein + zeaxanthin

However after reading this...

One cup of romaine lettuce has:
* 8 calories
* 0.58 gram protein
* 1 gram fiber
* 16 mg calcium
* 116 mg potassium
* 11.3 mg vitamin C
* 64 mcg folate
* 48.2 mcg vitamin K
* 1637 mcg beta carotene
* 1087 mcg of lutein + zeaxanthin.

(Source: Iceberg and Romaine Lettuce Nutrition)

So, I'll certainly switch to...

Romaine lettuce

Here, it's hard to get a package of pre-washed lettuce. I need a salad spinner...