La lettuce (lactuca sativa L.) represents a central resource for the Italian fruit and vegetable sector, capable of combining a solid economic value with a biochemical profile of great interest for the health. Often considered a simple low-calorie food, this herbaceous plant contains a complexity of bioactive compounds The distribution of which varies significantly among the different cultivars. An analysis of the Italian supply chain highlights its technological evolution and its ability to meet modern nutritional needs.
Botanical history and evolution from its origins to Renaissance recipe books
The cultivation of lettuce – derived in its first forms from the wild species lactuca serriola, native to the Mediterranean area and western Asia – was already known to the Egyptians over 4.000 years ago. In ancient Egypt it was associated with Min, goddess of fertility, probably due to the presence of white latex, emitted from the cut stem, which earned her the Latin name lactuca, from the term lake (milk).
Pliny the Elder describes several varieties in the Naturalis Historia, attributing digestive and calming properties to the vegetable. A well-known Roman legend tells that the emperor Augustus, cured of a serious illness thanks to the regular consumption of lettuce, had a commemorative statue erected. In Middle Ages The crop remained present in European monastic and peasant gardens, until it became one of the symbolic vegetables of modern Mediterranean cuisine.
Already in the 15th and 16th centuries, Italian and Flemish merchants spread the tufted varieties in Northern Europe, while in Renaissance Italian recipe books carefully distinguished cabbage lettuce from Roman and Gentile lettuce — types that can still be found on the stalls of farmers’ markets and large-scale retail outlets.
Characteristics of the main Italian commercial varieties
Lettuce belongs to the family of AsteraceaeIt is an annual herbaceous plant characterized by leaves arranged in a rosette with extremely variable shapes, colors, and textures depending on the variety. The main commercial Italian types include:
Romanian (Cart): elongated, crunchy leaves, rich in folates and carotenoids; also excellent grilled;
hood: compact head, tender leaves, delicate flavour; the most widely grown in greenhouses in Campania and Lazio under winter conditions;
iceberg: very compact variant, leader in retail sales and in the IV range (Plantgest, 2021);
little lady e lettuce: soft, wavy leaves, short cycle, suitable for scaled production;
Lollo blonde and red: characteristic wrinkling of the leaves, high concentration of anthocyanins in the red variety;
baby leaf to cut: multivariant mix for the fourth range, continuous production both in open fields and in vertical farming.
The content of bioactive compounds varies significantly depending on the color foliar: red or dark green leaf varieties are generally richer in polyphenols, anthocyanins and carotenoids than light varieties (Kim et al., 2016; Shi et al., 2022).
Lettuce prefers cool temperate climatesHigh temperatures and water stress favor seed bolting (bolting) and the accumulation of bitter compounds (lactucin, lactucopicrin). In Italy Availability is practically year-round thanks to the combination of open field and greenhouse crops, with the best productions in the spring and autumn seasons.
Economic performance of the supply chain and export growth
Fruit and vegetables are a cornerstone of the Italian agri-food industry. According to ISMEA, in the first eleven months of 2025, agri-food exports grew by 5%, reaching nearly €67 billion, with annual revenues projected to reach around €73 billion—a new all-time record for Made in Italy agri-food products (ISMEA, 2026). fresh vegetables record a +2,9% increase in domestic consumption in 2025.
on the side offruit and vegetables, the CSO Italy 2025 Report highlights retail purchases of 5,45 million tons (+5% on 2024) for a total value of 13,77 billion euros (+7%). exports Italian fresh fruit and vegetable sales reach 6,7 billion euros (+11%), with the organically grown products accelerating sharply: +13% in volume and +14% in value, exceeding 593.000 tonnes and 1,45 billion euros (CSO Italy, 2026).
La lettuce It is one of the main Italian horticultural crops. ISTAT data relating to production in open fields and in protected cultivation indicate over 500.000 tons per year of salads (lettuce and similar) on approximately 20.000 hectares in total, with production concentrated in Puglia, Lazio, Campania and Sicily for open fields, and in Lazio, Campania and Veneto for protected crops (ISTAT, 2020; Plantgest, 2021). Winter greenhouse production particularly fuels exports to Germany, Austria and Switzerland, primary destinations of the iceberg and Campania and Lazio hood.
The segment of IV range (ready-to-eat salads) continues to represent one of the growing outlets for the lettuce supply chain, thanks to the structural demand for fresh and ready-to-eat products, driven by changes in family eating habits.
Cultivation areas and challenges of agronomic transition
The main Italian production areas In Italy, these regions include Veneto, Lazio, Campania, Puglia, Sicily, and Emilia-Romagna. Cultivation requires fertile, well-drained soils rich in organic matter. Southern Italy’s production guarantees harvests during the winter months thanks to the mild temperatures, while northern areas offer high quality in the cooler seasons.
From an agronomic point of view, lettuce presents critical issues related tohigh water needs, vulnerability to climatic stress, pressure from fungal pathogens (in particular bremia lactucae, the agent of downy mildew, present today with over 36 different races) and bacterial, as well as the possible accumulation of nitrates in intensive cultivation conditions or low light.
The most widespread sustainable practices today include drip irrigation and precision fertigation, reduction of nitrogen inputs, integrated biological control, use of efficient greenhouses, crop rotation and organic farming.
Nutritional profile and distribution of antioxidant compounds
According to the CREA food composition tables (2019), 100 grams of fresh cabbage lettuce provide on average:
water: 92,2 g;
energy value: 22 kcal;
protein: 1,5 g;
lipids: 0,2 g;
carbohydrates: 3 g, of which sugars 3 g
dietary fiber: 1,3 g.
From a micronutrient point of view, lettuce is rich in vitamin A: 237 μg per 100 grams of product, equal to 30% of the Nutritional Reference Value (800 μg) indicated in Annex XIII to Regulation (EU) No. 1169/11.
The profile varies significantly by varietal type. Romaine lettuce and red-leaf varieties have a higher content of folates — with levels comparable to other leafy sources — and phenolic compounds, while iceberg lettuce is relatively poor in micronutrients and bioactive compounds (Kim et al., 2016). red varieties contain anthocyanins (cyanidin-3-glucoside, cyanidin-3-6”-malonylglucoside) detected exclusively in pigmented leaves (Llorach et al., 2008).
Among the bioactive compounds of greatest nutritional interest are:
polyphenols: chlorogenic, caffeic, chicoric acids and flavonoids (luteolin, quercetin), with higher concentrations in the red and dark green varieties;
carotenoids: β-carotene, lutein and zeaxanthin, fat-soluble and with antioxidant action;
natural nitrates: substances having a physiological role in vascular modulation.
Scientific evidence on cardiovascular benefits and neuroprotection
Scientific literature in recent years has explored lettuce’s health benefits, confirming and expanding the properties attributed to this vegetable. Although the relevance of these studies has not been assessed by EFSA (European Food Safety Authority) for the purposes of authorizing specific health claims, it is interesting to examine the results.
Antioxidant and anti-inflammatory effects
Red and dark green leaf varieties present significant concentrations of flavonoids and phenolic acids associated with the reduction of oxidative stress. Shi et al. (2022) documented, on 50 varieties, that red lettuces show a significantly higher antioxidant capacity than green ones, with a prevalence of chlorogenic, chicoric and isochlorogenic acids. Studies vitro e in vivo show anti-inflammatory, hypocholesterolemic and antidiabetic activities attributable to the bioactive compounds of lettuce (Kim et al., 2016).
Cardiovascular health
I natural nitrates present in leafy vegetables—including lettuce—have been associated with reduced blood pressure and cardioprotective effects through the nitrate–nitrite–nitric oxide pathway. Bondonno et al. (2021), in a large prospective study of a Danish cohort, found an inverse association between plant nitrate intake and the incidence of cardiovascular disease, independent of other risk factors. Jackson et al. (2019) confirmed similar associations in an Australian cohort of middle-aged women followed for 15 years.
Lutein, zeaxanthin and ocular and cognitive health
Lettuce, particularly the romaine variety, contains lutein and zeaxanthin, carotenoids that selectively accumulate in the retinal macula. A 2024 review documents the protective role of these compounds in ocular health (prevention of age-related macular degeneration) and cognitive function, with an inverse association between serum levels and the incidence of dementia (Tekgul & Çakıroğlu, 2024).
Intestinal health
Le dietary fibers They contribute to intestinal function and the maintenance of the microbiota, with prebiotic effects documented for the soluble fractions present in the leaves.
Neuroprotective effects
Shi et al. (2022) reported that phenolic extract of romaine lettuce exerts neuroprotective effects vitro on PC-12 cells subjected to oxidative damage, with particular emphasis on isochlorogenic acid.
Nitrates and safety
Leafy vegetables can accumulate nitrates, especially in intensive cultivation and in low light conditions. EFSA (2008) concluded that ordinary consumption of lettuce as part of a varied diet does not generally pose a risk to the adult population, and that the cardiovascular benefits of vegetable nitrates outweigh the potential risks associated with nitrosamines for the vast majority of consumers.
How to consume and enhance the outer leaves
Lettuce is mostly eaten raw, but some varieties — particularly the Romanian —They lend themselves excellently to cooked preparations: grilled, sautéed, or in creamed soups. Popular uses include mixed salads, sandwiches and burgers, vegetable wraps, green juices and smoothies, soups, and sautéed side dishes. In the fresh-cut sector, lettuce is the primary raw material for ready-to-eat salads, with multi-pack packaging experiencing strong growth in large-scale retail outlets.
An often overlooked aspect: the outer leaves The greenest and darkest, often discarded by consumers, are the richest in polyphenols, chlorophyll, and carotenoids. Their use in cooking—including in juices and smoothies—maximizes the intake of bioactive compounds.
Guide to conscious choice and consumption
To enhance nutritional quality and food safety it is advisable to:
prefer lettuces fresh, turgid and seasonal;
privilege certified organic products, which reduce exposure to pesticide residues in a vegetable consumed predominantly raw;
choose local production and short supply chains;
do not discard the more pigmented outer leaves, which are richest in beneficial compounds;
Vary between types: alternate between romaine, lettuce, lollo rossa, and iceberg lettuce to maximize micronutrient diversity.
Conclusions
The future of the lettuce supply chain in Italy is closely linked to the ability to combine agronomic innovation with environmental protection, particularly through water management and the reduction of chemical inputs. For consumers, understanding the value contained in the different varieties and less valuable parts of the head represents a key to improving health and reducing waste. Choosing local and certified organic products remains the best way to support a resilient and high-quality agri-food system.
Dario Dongo
Credit cover Dario Dongo
Bibliography
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Dario Dongo, lawyer and journalist, PhD in international food law, founder of WIISE (FARE – GIFT – Food Times) and Égalité.
Dining and Cooking