# CNR research on vitamin B9 in leafy greens

> Live situation record from CLSTR: https://clstr.news/situations/cnr-research-on-vitamin-b9-in-leafy-greens
> Updated: 2026-09-21T07:23:09.000Z. Sources: 7. Developments: 2.

Researchers at the National Research Council (CNR) in Italy have identified a method to enhance the nutritional profile of leafy vegetables through light management. By modulating light intensity during the cultivation of young leaves and petioles—specifically in species such as mizuna, chicory, and tatsoi—the study found that vitamin B9 (folate) levels can be significantly increased.

Quantitative data indicates that a 100-gram portion of mizuna or tatsoi grown under these conditions can provide approximately 45% of the recommended daily folate intake for adults and 30% for pregnant individuals. Furthermore, the research noted that this light management approach leads to a reduction in nitrate accumulation in the leaves, improving nutritional quality without compromising crop productivity.

## Claims

- The National Research Council (CNR) has identified a method to increase vitamin B9 in leafy vegetables using light management. (corroborated by 3 sources)
- The study analyzed mizuna, chicory, and tatsoi species. (corroborated by 3 sources)
- Modulated light exposure increases vitamin B9 accumulation in plant tissues. (corroborated by 3 sources)
- Increased light availability reduces nitrate concentrations in leaves. (corroborated by 3 sources)
- A 100g portion of cultivated mizuna or tatsoi provides approximately 45% of the recommended daily folate requirement for an adult. (corroborated by 3 sources)
- The method provides 30% of the folate requirement for pregnant individuals per 100g serving. (corroborated by 3 sources)

## Timeline

### 2026-09-21: CNR researchers find way to boost vitamin B9 in leafy vegetables using light

The Italian National Research Council has discovered that managing light intensity during growth can increase vitamin B9 levels and reduce nitrates in leafy vegetables like mizuna and tatsoi.

4 sources. https://clstr.news/cluster/cnr-researchers-find-way-to-boost-vitamin-b9-in-leafy-vegetables-using-light

### 2026-09-16: CNR research shows light management boosts vitamin B9 in leafy greens

Italian CNR-ISPA researchers found that managing light intensity during cultivation increases vitamin B9 in leafy vegetables like mizuna and tatsoi while reducing nitrate levels.

3 sources. https://clstr.news/cluster/cnr-research-shows-light-management-boosts-vitamin-b9-in-leafy-greens

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Cite as: CNR research on vitamin B9 in leafy greens. CLSTR, https://clstr.news/situations/cnr-research-on-vitamin-b9-in-leafy-greens