Durum semolina wheat flour (Triticum durum Desf.)
Description
Coarsely milled endosperm of durum wheat (“semolina”) with a granular texture and naturally golden-yellow hue (carotenoids), used primarily for pasta, couscous, and semolina porridges.
In trade, “durum semolina” (coarser granulation) differs from “durum wheat flour” (finer, sometimes called fine semolina); the latter is used for certain breads, pizza, and laminated pasta.
Functional hallmarks: high protein, strong gluten (high tenacity/low extensibility), low lipoxygenase (better color retention).
Caloric value (per 100 g)
~340–370 kcal; carbohydrates 70–75 g, protein 12–14 g, fat 1–2 g, fiber 2–4 g, sodium ~0 g (intrinsic).
Key constituents
Starch (amylose/amylopectin matrix) governing water uptake and firmness.
Proteins (gliadins/glutenins) forming durum gluten with high strength.
Carotenoids (e.g., lutein) responsible for yellow color; minerals (ash), B vitamins (partly reduced by milling unless enriched).
Quality markers often monitored: protein % (N×5.7), wet/dry gluten, gluten index, granulation profile, ash, color L*a*b* (b* yellowness), falling number, damaged starch.
Production process
Cleaning/conditioning of durum wheat (optimize kernel hardness and moisture).
Roller milling with intensive semolina purification to minimize bran specks.
Sifting/classification to target particle-size distribution (semolina vs fine flour).
Optional enrichment (jurisdiction-dependent) with iron and B vitamins.
Packaging in silos or lined multiwall bags; full traceability under GMP/HACCP with CCP on metal detection, foreign matter, and (if enriched) premix dosing.
Sensory and technological properties
Color: bright golden yellow; excessive oxidation/heat dulls b*.
Rheology: strong gluten promotes surface integrity and al dente firmness in pasta.
Granulation drives water absorption, extrusion throughput, die swell, and cooking tolerance.
Low LOX activity favors carotenoid retention during processing/drying.
Food uses
Extruded pasta (penne, fusilli), sheeted pasta (lasagne), couscous, gnocchi alla romana/semolina porridge, and bakery blends (breads, pizza, taralli) for color, flavor, and bite.
Coatings/batters to add crunch and golden hue.
Nutrition and health
Complex carbohydrates with moderate protein; low intrinsic fat.
Gluten-containing (unsuitable for celiac disease); wheat allergy may occur.
Glycemic response: pasta from coarse semolina, cooked al dente, generally yields a lower GI than overcooked pasta or products from very fine flours; pairing with fiber/protein/fat further moderates postprandial glycemia.
Lipid profile
Very low total fat; intrinsic pattern (traces): PUFA (polyunsaturated fatty acids, mainly linoleic) ≥ MUFA (monounsaturated fatty acids, oleic) > SFA (saturated fatty acids).
Health note: favoring MUFA/PUFA over SFA is generally favorable/neutral for blood lipids; absolute impact here is small due to low fat content. TFA (trans fatty acids) absent; MCT (medium-chain triglycerides) not characteristic.
Quality and specifications (typical topics)
Moisture ≤14.0%, protein 12.0–14.0% (db, market-dependent), ash ~0.55–0.90% (db).
Granulation distribution (e.g., % on 425/300/212 μm sieves for semolina; finer for flour).
Speck count (bran), b* minimum (yellowness), damaged starch low–moderate, gluten index within target, falling number adequate.
Microbiology: low APC; Salmonella absent/25 g; yeasts/molds within spec.
Contaminants: pesticides/metals compliant; mycotoxins (e.g., DON) within legal limits.
Storage and shelf-life
Store cool, dry, dark (≤25 °C; RH <65%); protect from odors and pests.
Typical shelf-life 6–12 months (shorter in hot/humid climates); rotate by FIFO. Program aeration/sanitation for bulk silos.
Allergens and safety
Contains wheat/gluten (major allergen in many jurisdictions).
Manage cross-contact (e.g., soy, milk, egg in pasta plants; sesame in bakeries).
Implement dust control for worker safety and dust-explosion mitigation.
INCI functions in cosmetics
Not a standard INCI ingredient; related entries include Triticum Vulgare (Wheat) Flour, Hydrolyzed Wheat Protein, Triticum Vulgare (Wheat) Germ Oil (absorbent, skin conditioning, antioxidant).
Troubleshooting
Dull pasta color → reduce oxidation/thermal load; select low-LOX lots; optimize drying.
Soft/sticky cooked pasta → protein too low or excessive fines; increase protein target, tighten granulation (higher coarse fraction), optimize extrusion/drying profile.
Bran specks → improve purification/sifting; service worn rolls/sieves.
Premix segregation (if enriched) → improve micro-dosing and mixing order; use suitable carriers.
Rancid/off-odors → high moisture/heat or bran carryover; lower moisture, cool storage, stricter purification.
Sustainability and supply chain
Source durum from regions practicing precision irrigation and IPM; prefer varieties with Fusarium tolerance to lower mycotoxin risk.
Mill optimization: efficient drives, heat recovery, and valorization of bran/shorts in feed or coproducts.
Treat wastewater to BOD/COD targets; maintain full traceability under GMP/HACCP.
Conclusion
Durum semolina wheat flour combines processing functionality (strong gluten, controlled granulation, golden color) with reliable performance in pasta and related foods. Tight control of granulation, protein/gluten metrics, color, and (where applicable) enrichment uniformity yields products that are safe, stable, and sensory-consistent.
Mini-glossary
GI — glycemic index: post-meal blood-glucose response; lowered by al dente cooking, coarser granulation, and pairing with fiber/protein/fat.
DON — deoxynivalenol: a wheat mycotoxin that must remain below legal limits.
SFA — saturated fatty acids: excessive intakes may raise LDL; present only in trace amounts here.
MUFA — monounsaturated fatty acids (e.g., oleic): generally favorable/neutral for blood lipids; trace here.
PUFA — polyunsaturated fatty acids (e.g., linoleic): beneficial when balanced; trace here.
TFA — trans fatty acids (industrial): avoid; absent in non-hydrogenated cereal products.
MCT — medium-chain triglycerides: typical of coconut oil; not present in semolina.
GMP/HACCP — good manufacturing practice / hazard analysis and critical control points: hygiene and preventive-safety systems with defined CCP.
CCP — critical control point: processing step where a control prevents/reduces a hazard (e.g., metal detection, dosing).
BOD/COD — biochemical/chemical oxygen demand: indicators of wastewater impact from milling processes.
FIFO — first in, first out: inventory rotation rule to use older lots first.
Studies
Resistant starch is the fraction of starch that escapes digestion in the small intestine (1) and is considered a form of dietary fiber with beneficial health properties (2). Because foods high in resistant starch are digested more slowly, they have been shown to improve insulin response and increase satiety (3).
The advantages of resistant starch also extend to colon health where fermentation occurs in the large intestine (4).
Wheat is used to obtain flours that can be:
The more refined the flours are, the more they lose their nutritional characteristics.
For example, type 0 is different from 00 because it is less refined in grinding.
Nutritional values:
Pretty caloric with about 337 kcalories per 100 grams.
Saturated fatty acids: 0.4g per 100 grams
It contains less protein than hard wheat that is used for the preparation of pasta.
Wheat studies
References_______________________________________________
(1) Ann J Slade, Cate McGuire, Dayna Loeffler, Jessica Mullenberg, Wayne Skinner, Gia Fazio, Aaron Holm, Kali M Brandt, Michael N Steine, John F Goodstal, Vic C Knauf Development of high amylose wheat through TILLING BMC Plant Biol. 2012; 12: 69. Published online 2012 May 14. doi: 10.1186/1471-2229-12-69
Abstract. Background: Wheat (Triticum spp.) is an important source of food worldwide and the focus of considerable efforts to identify new combinations of genetic diversity for crop improvement. In particular, wheat starch composition is a major target for changes that could benefit human health. Starches with increased levels of amylose are of interest because of the correlation between higher amylose content and elevated levels of resistant starch, which has been shown to have beneficial effects on health for combating obesity and diabetes. TILLING (Targeting Induced Local Lesions in Genomes) is a means to identify novel genetic variation without the need for direct selection of phenotypes. Results: Using TILLING to identify novel genetic variation in each of the A and B genomes in tetraploid durum wheat and the A, B and D genomes in hexaploid bread wheat, we have identified mutations in the form of single nucleotide polymorphisms (SNPs) in starch branching enzyme IIa genes (SBEIIa). Combining these new alleles of SBEIIa through breeding resulted in the development of high amylose durum and bread wheat varieties containing 47-55% amylose and having elevated resistant starch levels compared to wild-type wheat. High amylose lines also had reduced expression of SBEIIa RNA, changes in starch granule morphology and altered starch granule protein profiles as evaluated by mass spectrometry. Conclusions: We report the use of TILLING to develop new traits in crops with complex genomes without the use of transgenic modifications. Combined mutations in SBEIIa in durum and bread wheat varieties resulted in lines with significantly increased amylose and resistant starch contents.
(2) Englyst HN, Macfarlane GT. Breakdown of resistant and readily digestible starch by human gut bacteria. J Sci Food Agric. 1986;37:699–706.
Abstract. Cooking and processing of starch‐containing foodstuffs results in a portion of the starch becoming resistant to hydrolytic enzymes secreted in the small intestine of man. In order to determine whether this resistant starch (RS) was degraded in the colon, samples of RS and readily digestible starch (RDS) for comparisons were incubated with (a) cell‐free supernatants from faecal suspensions and (b) washed faecal bacterial cell suspensions. The data obtained showed that, whereas pancreatic amylase and faecal supernatants hydrolysed RDS, with the production of oligosaccharides, RS totally resisted breakdown. In contrast, both RS and RDS were completely degraded by the washed bacterial cells with the generation of volatile fatty acids (VFA) and organic acids. Hydrolysis and fermentation of RDS was extremely rapid and, as a consequence, oligosaccharides and lactate initially accumulated in the culture medium. RS was broken down more slowly, howevér, and oligosaccharides and lactate never accumulated. The rate of polysaccharide hydrolysis had a significant effect on the quantities of VFA produced, in that 54% of carbohydrate was fermented to VFA in cultures incubated with RDS as sole carbon source as compared to only 30% in cultures incubated with RS. However no qualitative difference was observed in the VFA produced by fermentation of RDS or RS.
(3) Robertson MD, Currie JM, Morgan LM, Jewell DP, Frayn KN. Prior short-term consumption of resistant starch enhances postprandial insulin sensitivity in healthy subjects. Diabetologia. 2003;46:659–665.
Abstract. Aims/hypothesi. Diets rich in insoluble-fibre are linked to a reduced risk of both diabetes and cardiovascular disease; however, the mechanism of action remains unclear. The aim of this study was to assess whether acute changes in the insoluble-fibre (resistant starch) content of the diet would have effects on postprandial carbohydrate and lipid handling. Methods Ten healthy subjects consumed two identical, low-residue diets on separate occasions for 24 h (33% fat; <2 g dietary fibre). Of the diets one was supplemented with 60 g resistant starch (Novelose 260). On the following morning a fibre-free meal tolerance test (MTT) was carried out (59 g carbohydrate; 21 g fat; 2.1 kJ) and postprandial insulin sensitivity (SIORAL) assessed using a minimal model approach. Results Prior resistant starch consumption led to lower postprandial plasma glucose (p=0.037) and insulin (p=0.038) with a higher insulin sensitivity(44±7.5 vs 26±3.5×10−4 dl kg−1 min−1 per µUml−1; p=0.028) and C-peptide-to-insulin molar ratio (18.7±6.5 vs 9.7±0.69; p=0.017). There was no effect of resistant starch consumption on plasma triacylglycerol although non-esterified fatty acid and 3-hydroxybutyrate levels were suppressed 5 h after the meal tolerance test. Conclusion Prior acute consumption of a high-dose of resistant starch enhanced carbohydrate handling in the postprandial period the following day potentially due to the increased rate of colonic fermentation.
Robertson MD, Bickerton AS, Dennis AL, Vidal H, Frayn KN. Insulin-sensitizing effects of dietary resistant starch and effects on skeletal muscle and adipose tissue metabolism. Am J Clin Nutr. 2005;82:559–567
Abstract. Background: Resistant starch may modulate insulin sensitivity, although the precise mechanism of this action is unknown. Objective: We studied the effects of resistant starch on insulin sensitivity and tissue metabolism. Design: We used a 4-wk supplementation period with 30 g resistant starch/d, compared with placebo, in 10 healthy subjects and assessed the results by using arteriovenous difference methods. Results: When assessed by euglycemic-hyperinsulinemic clamp, insulin sensitivity was higher after resistant starch supplementation than after placebo treatment (9.7 and 8.5 x 10(-2) mg glucose x kg(-1) x min(-1) x (mU insulin/L)(-1), respectively; P = 0.03); insulin sensitivity during the meal tolerance test (MTT) was 33% higher (P = 0.05). Forearm muscle glucose clearance during the MTT was also higher after resistant starch supplementation (P = 0.03) despite lower insulin concentrations (P = 0.02); glucose clearance adjusted for insulin was 44% higher. Subcutaneous abdominal adipose tissue nonesterified fatty acid (NEFA; P = 0.02) and glycerol (P = 0.05) release were lower with resistant starch supplementation, although systemic NEFA concentrations were not significantly altered. Short-chain fatty acid concentrations (acetate and propionate) were higher during the MTT (P = 0.05 and 0.01, respectively), as was acetate uptake by adipose tissue (P = 0.03). Fasting plasma ghrelin concentrations were higher with resistant starch supplementation (2769 compared with 2062 pg/mL; P = 0.03), although postprandial suppression (40-44%) did not differ significantly. Measurements of gene expression in adipose tissue and muscle were uninformative, which suggests effects at a metabolic level. The resistant starch supplement was well tolerated. Conclusion: These results suggest that dietary supplementation with resistant starch has the potential to improve insulin sensitivity. Further studies in insulin-resistant persons are needed.
(4) Topping DL, Clifton PM. Short-chain fatty acids and human colonic function: roles of resistant starch and nonstarch polysaccharides. Physiol Rev. 2001;81:1031–1064.
Abstract. Resistant starch (RS) is starch and products of its small intestinal digestion that enter the large bowel. It occurs for various reasons including chemical structure, cooking of food, chemical modification, and food mastication. Human colonic bacteria ferment RS and nonstarch polysaccharides (NSP; major components of dietary fiber) to short-chain fatty acids (SCFA), mainly acetate, propionate, and butyrate. SCFA stimulate colonic blood flow and fluid and electrolyte uptake. Butyrate is a preferred substrate for colonocytes and appears to promote a normal phenotype in these cells. Fermentation of some RS types favors butyrate production. Measurement of colonic fermentation in humans is difficult, and indirect measures (e.g., fecal samples) or animal models have been used. Of the latter, rodents appear to be of limited value, and pigs or dogs are preferable. RS is less effective than NSP in stool bulking, but epidemiological data suggest that it is more protective against colorectal cancer, possibly via butyrate. RS is a prebiotic, but knowledge of its other interactions with the microflora is limited. The contribution of RS to fermentation and colonic physiology seems to be greater than that of NSP. However, the lack of a generally accepted analytical procedure that accommodates the major influences on RS means this is yet to be established.
Durum semolina wheat flour 
