where does lettuce get its nutrients
Green leaf lettuce contains vitamin A in the form of three carotenoids: beta-carotene, lutein and zeaxanthin.Beta-carotene is converted into the type of vitamin A thatâs needed for normal vision and to support the immune system.reen leaf lettuce contains vitamin A in the form of three carotenoids: beta-carotene, lutein and zeaxanthin.