Whole durum wheat pasta: nutrients, microbiota and health

The integrity of the kernel: a complete biological system

Whole wheat pasta differs from conventional pasta by the presence of all constituents of the  durum wheat kernel: endosperm, bran and wheat germ, without fraction separation (except for foreign substances and impurities). The germ – the most valuable fraction of the grain – is a privileged source of  unsaturated fatty acids (linoleic and alpha-linolenic acid), tocopherols (vitamin E) and B vitamins (thiamine B1, niacin B3, pyridoxine B6, folic acid B9). The minerals bioavailable – primarily magnesium, zinc, iron and selenium – are concentrated in the outer layers of the kernel and are almost completely lost during the refining process. A 100 g portion of dry whole wheat pasta contains about 9–10 g of fiber total, a value almost three times higher than refined pasta (2.5–3.5 g), whose polyphenol content is similarly reduced due to the removal of the bran. (1)

Bran fibers perform a documented  prebiotic function: they promote intestinal transit and, above all, modulate the composition of the microbiota intestinal. The bacterial fermentation of  arabinoxylans of whole grain, by colon bacteria, generates short-chain fatty acids (SCFA) – in particular butyrate, propionate, and acetate – which play a key role in maintaining intestinal barrier integrity, regulating immune response, and suppressing systemic inflammation through GPR43 and NF-κB signaling pathways. Butyrate, in particular, is the main energy source for colonocytes and has demonstrated pro-apoptotic properties on colon cancer cells. (2)

Several factors contribute to determining the functional properties of wholemeal pasta:

• genotype selection: varietal selection is aimed at maximizing the  performance nutritional of durum wheat, increasing the amount of bioactive phytochemicals – in particular  phenolic acids in the bran fractions – and micronutrients such as zinc and iron;

• agronomic management: production organic tends to match that of conventional in terms of protein and starch, while  polyphenols and other antioxidants are often present at higher concentrations, with positive effects on the functional quality of the finished product. A meta-analysis of 343 peer-reviewed publications quantified in organic products a 19% higher concentration of phenolic acids, 50% of flavonols, and 51% of anthocyanins compared to conventional ones, with differences mainly attributable to the fertilization regime (Barański et al., 2014); (3)

• technological dehulling processes: fraction analysis of bran shows that the total content of  phenolic acids is significantly higher in the outer fractions compared to the dehulled kernels, confirming that these compounds are mainly accumulated in the peripheral layers of the caryopsis. (4)

Ferulic acid and microbiota: the guardians of intestinal immunity

Whole durum wheat pasta combines the benefits of  low glycemic index of traditional semolina – on average 52 for 100% whole wheat pasta, versus 55 for traditional pasta – with the added value of  bioactive components concentrated in the bran and germ. Its functional profile includes:

• phytocompounds (phenolic compounds such as phenolic acids, alkylresorcinols and flavonoids; lignans; phytic acid);

• dietary fibers both soluble and insoluble, including arabinoxylans (AX) and arabino-oligosaccharides (AXOS);

• macronutrients and micronutrients in bioavailable form. (5)

Theferulic acid deserves a specific mention: it is the main polyphenol bound to wheat arabinoxylans and – unlike free polyphenols – exerts its antioxidant action in a delayed and prolonged manner, through progressive release by the colon bacterial microflora. This mechanism activates the Keap1-Nrf2 signaling pathway, reducing reactive oxygen species (ROS) and strengthening the immune defenses of the intestinal mucosa. Whole wheat pasta, thanks to the structure of its matrix, keeps the arabinoxylan–ferulic acid chain intact until colonic fermentation, thus amplifying the bioaccessibility of this compound compared to conventional pasta. (6)

Scientific evidence: cardiovascular protection and longevity

The benefits of whole wheat pasta manifest on multiple levels. Regarding glycemic control, the structural complexity of the whole matrix slows starch digestion and the postprandial response profile, reducing the glycemic peak. The protein fraction contributes to the sense of satiety, whose index for whole wheat pasta reaches 188% compared to white bread. (5)

On the epidemiological level, the evidence regarding the benefit of dietary fiber consumption is today among the strongest in the field of nutrition, although not yet evaluated by EFSA (European Food Safety Authority) in the context of the Nutrition and Health Claims Regulation (EC) No 1924/06. An umbrella review updated on over 17 million individuals (33 meta-analyses, 38 health outcomes) highlighted:

• class I evidence – the highest – for the reduction of  cardiovascular mortality, pancreatic cancer and diverticular disease;

• class II evidence for all-cause mortality, cardiovascular diseases and coronary heart disease (Veronese et al., 2025). (7)

A previous meta-analysis of 64 prospective studies (3.5 million subjects) had quantified the risk reduction associated with high consumption of  total dietary fiber in: –23% for all-cause mortality, –26% for cardiovascular mortality, and –22% for cancer mortality. Where insoluble fiber from cereals, the predominant category in wholemeal pasta, prove to be the most effective (Ramezani et al., 2024). (8)

Regarding whole grains, a meta-analysis of 1.6 million subjects from 68 prospective studies showed that with each increment of 30 g/day of intake is associated with a risk reduction of coronary heart disease, overall cardiovascular diseases, and total mortality (Hu et al., 2023). (9)

The study  Food Labelling of Italian Products (FLIP) – conducted by CNR, SINU and various Italian universities – showed how organic products in the Italian market are generally characterized by a  greater presence of fiber e a more pronounced  prebiotic function compared to conventional ones. (10) The analytical comparison between wholemeal and traditional pasta shows that:

• the total content of polyphenols is systematically higher in wholemeal products;

• the bound fiber fraction of bran retains its antioxidant capacity even after cooking;

• the free fiber fraction instead shows a loss of up to 46%, due to solubilization in water (De Paepe et al., 2017; Falasca et al., 2025). (11,12)

Functional pasta and FODMAP management: the new frontiers

The research focused on further enhancing the nutritional properties of whole wheat pasta through the addition of  prebiotic fibers e probiotics. The study  Healthy Effects of an Innovative Probiotic Pasta (SFLABPASTA) of the University of Parma tested for 12 weeks, on 41 healthy overweight or obese volunteers, a whole wheat pasta enriched with  barley β-glucans e Bacillus coagulans BC30. Researchers observed reductions in serum concentrations of hs-CRP (marker of low-grade inflammation) and the LDL/HDL ratio, compared to conventional whole wheat pasta, in a subgroup of participants. (13) The same group later reported an improvement in HDL-mediated cholesterol efflux capacity (CEC-ABCG1) in the symbiotic-treated group, suggesting a potential additional cardioprotective effect. (14)

Whole wheat pasta, however, has a dual nature functionally: alongside beneficial fibers, it contains fructooligosaccharides (FOS) and other compounds of the class of FODMAP (fermentable oligo-, di-, and monosaccharides and polyols), which can trigger or worsen symptoms of irritable bowel syndrome (IBS) and other functional gastrointestinal disorders in the predisposed portion of the population – estimated around 10–15% of adults. A recent analysis (Torbica et al., 2025) found that almost all commercial samples of whole wheat pasta fall into the 'high FODMAP content' category, with FOS as the prevalent component. (14) The cooking in abundant water reduces the FOS content in the range of 31–84%, suggesting that domestic management of the cooking process represents a practical lever to improve product tolerability, along with the industrial development of low-FODMAP pasta through the optimization of enzymes degrading fructooligosaccharides.

Conclusions

The value of whole durum wheat pasta lies in its intact matrix. Ferulic acid, germ tocopherols, and short-chain fatty acids (SCFA) produced by colonic fermentation form a fundamental bioactive barrier for the prevention of chronic-degenerative diseases. Despite the challenge posed by FODMAPs for hypersensitive consumers, global epidemiological evidence confirms the nutritional primacy of whole grains.These are decisive steps to optimize the benefits of this 'health ingredient'.

Dario Dongo and Andrea Adelmo Della Penna

Credit cover Girolomoni 

References

(1) Dongo, D. (2026, January 2). Whole wheat and semi-whole wheat pasta, nutritional values and benefits.  GIFT (Great Italian Food Trade). https://www.greatitalianfoodtrade.it/pasta/pasta-integrale-semi-integrale-valori-nutrizionali-benefici/

(2) Pan, X., Zhao, J., Jin, X., Chen, T., & Cheng, X. (2025). Ferulic acid mediates microbial fermentation of arabinoxylan to enhance host immunity by suppressing TLR4/NF-κB signaling.  International Journal of Biological Macromolecules, 305, 141133. https://doi.org/10.1016/j.ijbiomac.2025.141133

(3) Barański, M., Średnicka-Tober, D., Volakakis, N., Seal, C., Sanderson, R., Stewart, G. B., Benbrook, C., Biavati, B., Markellou, E., Giotis, C., Gromadzka-Ostrowska, J., Rembiałkowska, E., Skwarło-Sońta, K., Tahvonen, R., Janovská, D., Niggli, U., Nicot, P., & Leifert, C. (2014). Higher antioxidant and lower cadmium concentrations and lower incidence of pesticide residues in organically grown crops: A systematic literature review and meta-analyses.  British Journal of Nutrition, 112(5), 794–811.  https://doi.org/10.1017/S0007114514001366

(4) Zingale, S., Spina, A., Ingrao, C., Fallico, B., Timpanaro, G., Anastasi, U., & Guarnaccia, P. (2023). Factors affecting the nutritional, health, and technological quality of durum wheat for pasta-making: A systematic literature review.  Plants, 12(3), 530. https://doi.org/10.3390/plants12030530

(4) Hirawan, R., & Beta, T. (2014). Whole wheat pasta and health. In V. R. Preedy, R. R. Watson, & V. B. Patel (Eds.),  Wheat and rice in disease prevention and health (pp. 5–16). Academic Press. https://doi.org/10.1016/B978-0-12-401716-0.00001-5

(5) Zhang, B., Li, X., Li, B., Gao, C., & Jiang, Y. (2022). Ferulic acid mediates prebiotic responses of cereal-derived arabinoxylans on host health.  Frontiers in Nutrition, 9, 976392. https://doi.org/10.3389/fnut.2022.976392

(6) Veronese, N., Gianfredi, V., Solmi, M., Barbagallo, M., Dominguez, L. J., Mandalà, C., Di Palermo, C., Carruba, L., Solimando, L., Stubbs, B., Castagna, A., Maggi, S., Zanetti, M., Al-Daghri, N., Sabico, S., Nucci, D., Gosling, C., & Fontana, L. (2025). The impact of dietary fiber consumption on human health: An umbrella review of evidence from 17,155,277 individuals.  Clinical Nutrition, 51, 325–333. https://doi.org/10.1016/j.clnu.2025.06.021

(7) Ramezani, F., Pourghazi, F., Eslami, M., Ghasemi, N., Mohammadian Khonsari, N., Ejtahed, H. S., & Larijani, B. (2024). Dietary fiber intake and all-cause and cause-specific mortality: An updated systematic review and meta-analysis of prospective cohort studies.  Clinical Nutrition, 43(1), 65–83. https://doi.org/10.1016/j.clnu.2023.11.003

(8) Hu, H., Zhao, Y., Feng, Y., Yang, X., Li, Y., Wu, Y., Yuan, L., Zhang, J., Li, T., Huang, H., Li, X., Zhang, M., Sun, L., & Hu, D. (2023). Consumption of whole grains and refined grains and associated risk of cardiovascular disease events and all-cause mortality: A systematic review and dose-response meta-analysis of prospective cohort studies.  The American Journal of Clinical Nutrition, 117(1), 149–159. https://doi.org/10.1016/j.ajcnut.2022.10.010

(9) Dello Russo, M., Havranek, P., De Filippo, C., Agodi, A., Barchitta, M., Naska, A., & Lauria, F. (2021). Nutritional quality of pasta sold on the Italian market: The Food Labelling of Italian Products (FLIP) study.  Nutrients, 13(1), 171. https://doi.org/10.3390/nu13010171

(10) De Paepe, K., Verspreet, J., Courtin, C. M., & Van de Wiele, T. (2017). Polyphenols in raw and cooked cereals/pseudocereals/legume pasta and couscous.  Food Chemistry, 228, 659–664. https://doi.org/10.1016/j.foodchem.2017.01.143

(11) Falasca, S., Montanari, C., Brindisi, M., Mancusi, R., Blasi, E., & Camardo Leggieri, M. (2025). Nutritional, chemical, and functional properties of wholegrain einkorn pasta through cooking and digestion: A comparative study with wholegrain durum wheat pasta.  Foods, 14(3), 370. https://doi.org/10.3390/foods14030370

(12) Angelino, D., Martina, A., Rosi, A., Veronesi, L., Antonini, M., Mennella, I., Vitaglione, P., Grioni, S., Brighenti, F., Zavaroni, I., Fares, C., Torriani, S., & Pellegrini, N. (2019). Glucose- and lipid-related biomarkers are affected in healthy obese or hyperglycemic adults consuming a whole-grain pasta enriched in prebiotics and probiotics: A 12-week randomized controlled trial.  The Journal of Nutrition, 149(10), 1714–1723. https://doi.org/10.1093/jn/nxz071

(13) Favari, E., Angelino, D., Cipollari, E., Adorni, M. P., Zimetti, F., Bernini, F., Ronda, N., & Pellegrini, N. (2020). Functional pasta consumption in healthy volunteers modulates ABCG1-mediated cholesterol efflux capacity of HDL.  Nutrition, Metabolism and Cardiovascular Diseases, 30(10), 1768–1776. https://doi.org/10.1016/j.numecd.2020.05.002

(14) Torbica, A. M., Miljić, M., & Radosavljević, M. (2025). FODMAP profile of wholegrain pasta.  Foods, 14(4), 667. https://doi.org/10.3390/foods14040667