Home Ingredients PROMITOR® (Soluble Corn Fiber)

PROMITOR® (Soluble Corn Fiber)

Evidence Level
Limited
8 Clinical Trials
6 Documented Benefits
2/5 Evidence Score

PROMITOR® is Tate & Lyle's soluble corn fiber, a glucose polymer made from corn starch that largely resists digestion and is partly fermented in the colon. It comes in grades with about 70, 85 or 90 percent fiber and is labeled as soluble corn fiber. Swapping it for part of the digestible carbohydrate in a meal gave a smaller blood sugar and insulin rise in short meal tests, mainly because the meal then carries less sugar. In teens, about 10 to 20 g a day raised calcium absorption by 12 to 13 percent, but two year-long trials in children found no overall gain in bone mineral, and it did not raise calcium absorption after gastric bypass. It shifts gut bacteria such as bifidobacteria and Parabacteroides, while bowel habits did not change. Most studies were funded or supplied by the maker. Gas is the most common side effect.

Studied Dose Calcium and bone trials: 10 to 20 g of fiber a day for 3 weeks to 2 months, and 12 g a day for 1 year in children. Meal tests: about 26 g replacing half the carbohydrate in one meal, or 55 g over one day. Gut, tolerance and attention trials: 6 to 21 g a day for 2 to 4 weeks.
Active Compound Soluble corn fiber: a glucose polymer made from partially hydrolyzed corn starch with a mixture of alpha 1-4, 1-6 and 1-2 glucose linkages, so most of it passes the small intestine undigested. Grades contain about 70%, 85% or 90% fiber; the 70% grade has under 10% sugars and the 85% grade under 2%.

Benefits

Smaller blood sugar rise when it replaces part of a meal's carbohydrate

In a small study of 22 healthy men, a drink or rice meal in which 26 g of the fiber replaced half the carbohydrate gave lower glucose and insulin responses than the same meal made with digestible maltodextrin, so the fiber meal carried less digestible carbohydrate. In 18 adults with overweight, a day of such swaps lowered peak glucose and insulin after meals, though 24-hour glucose did not differ. Both were maker-supported single-day tests.

Supported by Trial 6, Trial 7

Calcium absorption in teens

In two maker-funded crossover trials in adolescents, 12 g a day for 3 weeks raised calcium absorption by 12 percent, and 10 or 20 g of fiber a day for 4 weeks raised it by about 13 percent versus no fiber. Calcium retention did not change in the 3-week trial. In 20 women after gastric bypass, 20 g a day for 2 months did not raise absorption versus placebo.

Supported by Trial 5, Trial 3

Bone mineral in children and teens

Two year-long placebo-controlled trials of 12 g a day in children aged 9 to 14 found no overall difference in whole-body bone mineral content or density, the main outcomes. In one, girls gained more bone mineral on the fiber in an adjusted subgroup analysis; boys did not. In 14 postmenopausal women, bone calcium retention improved, a marker rather than a bone density result.

Supported by Trial 1, Trial 2

Feeds bifidobacteria and Parabacteroides in the gut

In studies mostly funded by the maker, 6 g of fiber a day for 2 weeks raised stool bifidobacteria (no placebo group), 21 g a day raised bifidobacteria versus no added fiber, and 10 to 20 g a day raised Parabacteroides in teens; 18 g a day raised it about 4-fold in middle-aged and older adults. These are changes in gut bacteria, not proven health outcomes.

Supported by Trial 8, Trial 6

Stool weight and bowel habits

In healthy men, 21 g a day for 3 weeks raised stool wet weight versus no added fiber, but bowel movement frequency and stool consistency did not change. With 12 g a day, stool weight did not differ from maltodextrin, and with 18 g a day bowel frequency and stool consistency did not change, so effects on regularity in healthy adults appear small.

Supported by Trial 8, Trial 1

Attention reaction time in middle-aged and older adults

In a maker-funded crossover trial in 42 healthy adults aged 45 to 75, 18 g of fiber a day for 4 weeks gave flanker task reaction times about 10 to 14 milliseconds faster than maltodextrin. Accuracy, brain-wave measures and memory, also main outcomes, did not differ, nor did mood or other cognitive tests.

Supported by Trial 8

Mechanism of action

1

Resists digestion and is partly fermented in the colon

Its mix of glucose linkages slows digestion in the small intestine, so much of it reaches the colon, where bacteria ferment part of it. Breath hydrogen after a dose was lower than after inulin, and the maker's researchers estimated the fiber portion supplies about 0.2 kcal per gram.

2

Lowers the digestible carbohydrate in a food

When it replaces sugar, glucose or maltodextrin in a recipe, the food carries less carbohydrate that is absorbed as glucose, which is the main reason for the smaller blood sugar and insulin rise seen in meal tests.

3

Colon fermentation and calcium uptake

Researchers propose that fermentation products in the colon increase calcium absorption there. In teens, gains in calcium absorption tracked increases in Clostridium and related bacteria, an association rather than a proven cause.

Clinical trials

1
Soluble Corn Fiber 12 g/Day for 1 Year and Bone Mass in Children: MetA-Bone RCT (Primary Outcome Not Met)
PubMed

Randomized, placebo-controlled trial of 12 g/day soluble corn fiber or maltodextrin, with or without 600 mg calcium, for 1 year (NCT02916862); NICHD collaborator, with Tate & Lyle supplying part of the PROMITOR fiber and the placebo; no Tate & Lyle employee authors (Palacios et al. 2026, Am J Clin Nutr)

177 healthy children aged 9 to 14 with low habitual calcium intake in Miami.

Change in whole-body bone mineral content, the registered primary outcome, did not differ between fiber and placebo (registry-posted P = 0.377). In adjusted, sex-stratified analyses of completers, girls gained more whole-body bone mineral content (18.8% versus 12.9%) and density on the fiber; boys did not, and no gain was seen when calcium was added.

2
Soluble Corn Fiber 12 g/Day With or Without Calcium for 1 Year: PREBONE-Kids RCT (No Difference)
PubMed

Double-blind, randomized, four-arm parallel trial of 12 g/day soluble corn fiber, 600 mg calcium, both, or placebo in a drink for 1 year (NCT03864172); the registry lists Tate & Lyle as a collaborator and Europe PMC lists Tate & Lyle funding (Arasu et al. 2023, Osteoporos Int)

243 healthy preadolescent Malaysian children aged 9 to 11.

At 12 months, changes in whole-body bone mineral content and density did not differ among the groups. At 6 months, density rose more in the two calcium groups than with fiber alone or placebo. The authors concluded the fiber did not increase bone mineral.

3
Soluble Corn Fiber 10 or 20 g/Day and Bone Calcium Retention: Crossover RCT
PubMed

Double-blind, randomized crossover trial of 0, 10 and 20 g/day fiber from soluble corn fiber for 50 days each, with bone calcium retention tracked by a calcium isotope as the primary outcome (NCT02416947); the registry lists Tate & Lyle Health & Nutrition Sciences as a collaborator and Europe PMC lists Tate & Lyle funding (Jakeman et al. 2016, Am J Clin Nutr)

14 healthy postmenopausal women.

Bone calcium retention improved by 4.8% at 10 g and 7% at 20 g versus 0 g. Bone turnover markers NTx and osteocalcin did not change, and bone-specific alkaline phosphatase rose 8% at 20 g. Bone density and fractures were not measured.

4
PROMITOR SCF 85 at 10 or 20 g Fiber/Day and Calcium Absorption in Teen Girls: Crossover RCT
PubMed

Double-blind, randomized, three-period crossover trial of 0, 10 and 20 g/day fiber from PROMITOR SCF 85 for 4 weeks each, with calcium absorption as the registered primary outcome (NCT01660503); the registry lists Tate & Lyle as a collaborator and Europe PMC lists Tate & Lyle funding (Whisner et al. 2016, J Nutr)

28 healthy girls aged 11 to 14 eating their usual diets.

Calcium absorption rose by 13.3% at 10 g and 12.9% at 20 g versus 0 g. Stool bacterial diversity and Parabacteroides increased with dose. Calcium absorption is a marker; bone density was not measured.

5
Soluble Corn Fiber 20 g/Day After Gastric Bypass: 2-Month RCT (No Difference in Calcium Absorption)
PubMed

Double-blind, randomized, placebo-controlled trial of 20 g/day soluble corn fiber (24 g of Promitor Soluble Fiber 85) or maltodextrin for 2 months; product supplied by Tate & Lyle, which had no role in design or analysis; NIH funded (Wu et al. 2022, J Clin Endocrinol Metab)

20 postmenopausal women a mean of 5 years after gastric bypass surgery.

The primary outcome, change in fractional calcium absorption, did not differ between groups (difference +3.4%, 95% CI -6.7 to +13.6), nor did calcium hormones or bone turnover markers. Responses varied widely, and digestive symptoms were similar between groups.

6
PROMITOR Soluble Corn Fiber 90 Replacing Half the Carbohydrate: Glucose and Insulin Meal Test
PubMed

Randomized crossover single-meal test of 26 g soluble corn fiber or 27 g maltodextrin replacing half the carbohydrate in a glucose drink or glutinous rice, with glucose and insulin area under the curve as outcomes; funded by A*STAR and a Tate & Lyle education grant; one Tate & Lyle employee author (Tan et al. 2020, Nutrients)

22 healthy Chinese men aged 21 to 60.

Glucose and insulin areas under the curve were lower with the fiber than with all other test foods in both the drink and the rice meal. The maltodextrin drink raised glucose about 20% and insulin about 40% more than the fiber drink. Meals were matched for total, not digestible, carbohydrate, so the fiber meals carried much less digestible carbohydrate than the maltodextrin meals. Only single meals were tested.

7
Promitor Soluble Corn Fiber Replacing 30% of Carbohydrate: 24-Hour Respiration Chamber Crossover
PubMed

Single-blind, randomized crossover study of four one-day diets in which soluble corn fiber or polydextrose replaced 30% of the available carbohydrate at breakfast and lunch, versus two control diets; supported by Tate & Lyle, which supplied the products; no Tate & Lyle employee authors (Konings et al. 2014, Br J Nutr)

18 men and women with overweight.

Compared with the full-carbohydrate diet, the corn fiber diet (about 55 g that day) lowered peak glucose and insulin after breakfast and lunch, but 24-hour glucose area did not differ and appetite ratings did not change. Higher fat oxidation was attributed mainly to the lower energy of the fiber diets.

8
PROMITOR Soluble Fiber 18 g Fiber/Day for 4 Weeks: Attention and Gut Bacteria Crossover RCT
PubMed

Double-blind, randomized crossover trial of 22 g/day PROMITOR Soluble Fiber (18 g fiber) or maltodextrin for 4 weeks each, with five registered primary cognitive outcomes (NCT05066425); funded by Tate & Lyle and USDA; no Tate & Lyle employee authors (Alvarado et al. 2026, J Nutr)

42 healthy adults aged 45 to 75.

Flanker reaction times were about 10 to 14 ms faster on the fiber, while flanker accuracy, P3 brain-wave measures and relational memory, the other primary outcomes, did not differ. Parabacteroides rose about 4-fold; stool fatty acids, bowel frequency and stool consistency did not change, and gas scores rose.

Side effects and drug interactions

Common Potential side effects

Gas is the most common effect: flatulence scores rose with 18 g a day for 4 weeks and with 21 g a day for 3 weeks, and bloating rose slightly, though scores stayed in the mild range.
In one 3-week trial at 21 g a day, reflux scores were higher than with no added fiber, while overall tolerance scores stayed low.
In a tolerance study of the maker's fiber, the highest amounts meeting the tolerance criteria were 40 g of fiber taken at once and 65 g spread over the day; larger single doses are more likely to cause digestive upset.
In children aged 3 to 9, 3 to 8 g a day for 10 days was tolerated as well as inulin; in women after gastric bypass, 20 g a day caused symptoms similar to placebo.

Important Drug interactions

No drug interactions have been established for soluble corn fiber in the trials cited here, which enrolled mostly healthy people.
Diabetes medicines: replacing sugar or starch with this fiber lowers the carbohydrate in a meal, so check blood sugar when you change your diet substantially.
Fiber can change how quickly some medicines are absorbed; as a general precaution, take medicines an hour or two apart from a large fiber dose.

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Frequently asked questions about PROMITOR® (Soluble Corn Fiber)

What is PROMITOR soluble corn fiber?

PROMITOR is Tate & Lyle's brand of soluble corn fiber, a glucose polymer made from corn starch that mostly resists digestion. It is sold in grades with about 70, 85 or 90 percent fiber, as powder or liquid, and is usually listed on food labels as soluble corn fiber. Food makers use it to add fiber and replace some sugar.

How is PROMITOR different from Fibersol and other resistant dextrins?

Both are soluble fibers made from starch, but they are different products from different makers: Fibersol is a resistant maltodextrin from ADM and Matsutani, while PROMITOR comes from Tate & Lyle. Their research is separate, so results for one do not automatically apply to the other.

Does PROMITOR build stronger bones?

Not shown. It raised calcium absorption in teens and bone calcium retention in a small group of postmenopausal women, but those are markers. Two year-long trials in children found no overall gain in bone mineral content or density versus placebo, with a possible gain only in girls in one adjusted analysis.

How many calories does soluble corn fiber provide?

A study by the maker's researchers estimated the fiber portion supplies about 0.2 kcal per gram. The whole ingredient also contains some sugar and digestible carbohydrate, more in the 70 percent grade than the 85 percent grade, so check the nutrition label of the finished product.

How much can I take without stomach upset?

Studies used about 6 to 21 g a day with mostly mild gas. A tolerance study found up to 40 g of fiber at once and 65 g spread across the day met its criteria in healthy adults. Start low, spread intake through the day and increase gradually.

What is PROMITOR?

Promitor® is Tate & Lyle's soluble corn fiber, a glucose polymer made from corn starch that largely resists digestion and is partly fermented in the colon. It comes in grades with about 70, 85 or 90 percent fiber and is labeled as soluble corn fiber.

What is PROMITOR used for?

NutraSmarts does not list PROMITOR under a health category. What the research covers: In a small study of 22 healthy men, a drink or rice meal in which 26 g of the fiber replaced half the carbohydrate gave lower glucose and insulin responses than the same meal made with digestible maltodextrin, so the fiber meal carried less…

Is PROMITOR safe, and does it have side effects?

Side effects and cautions reported for PROMITOR include: Gas is the most common effect: flatulence scores rose with 18 g a day for 4 weeks and with 21 g a day for 3 weeks, and bloating rose slightly, though scores stayed in the mild range. It may also interact with some medications. PROMITOR is not right for everyone, so check with a healthcare provider first if you are pregnant or breastfeeding, have a medical condition, or take prescription medication.

Does PROMITOR interact with any medications?

Possible interactions include: No drug interactions have been established for soluble corn fiber in the trials cited here, which enrolled mostly healthy people. Diabetes medicines: replacing sugar or starch with this fiber lowers the carbohydrate in a meal, so check blood sugar when you change your diet substa… If you take prescription medication, check with a pharmacist or doctor before using it.

How strong is the scientific evidence for PROMITOR?

NutraSmarts rates the evidence for PROMITOR as Limited (2 out of 5). It is backed by 8 study summaries and 16 cited references summarized on this page. A higher rating reflects more, larger, and better-designed human studies.

References(16 citations)

Evidence ratings on NutraSmarts are based on the totality of human clinical research, with emphasis on randomized controlled trials, meta-analyses, and systematic reviews. The references below directly support claims made throughout this page.

  1. Tan WSK, Chia PFW, Ponnalagu S, Karnik K, Henry CJ. The Role of Soluble Corn Fiber on Glycemic and Insulin Response. Nutrients. 2020;12(4):961. doi: 10.3390/nu12040961.PubMedUsed to support: Randomized crossover meal test in 22 healthy Chinese men. Replacing half of the carbohydrate in a glucose drink or a glutinous rice meal with 26 g of PROMITOR Soluble Corn Fiber 90 (Tate & Lyle) gave a lower blood glucose and insulin area under the curve than the same meal made with digestible maltodextrin (meals were matched for total, not available, carbohydrate); the maltodextrin drink raised glucose about 20% and insulin about 40% more than the fiber drink. Funded by A*STAR and an education grant from Tate & Lyle; one author (Karnik) worked for Tate & Lyle. Single test meals only.
  2. Konings E, Schoffelen PF, Stegen J, Blaak EE. Effect of polydextrose and soluble maize fibre on energy metabolism, metabolic profile and appetite control in overweight men and women. Br J Nutr. 2014;111(1):111-21. doi: 10.1017/S0007114513002183.PubMedUsed to support: Single-blind randomized crossover study in 18 adults with overweight, each spending 24 hours in a respiration chamber per diet. Replacing 30% of the available carbohydrate at breakfast and lunch with Promitor soluble corn fiber (about 55 g that day) lowered peak glucose and the insulin response after both meals versus the full-carbohydrate diet, but 24-hour glucose area did not differ and appetite ratings did not change versus control. Higher fat oxidation was attributed mainly to the lower energy content of the fiber diets. Supported by Tate & Lyle, which supplied the test products.
  3. Whisner CM, Martin BR, Nakatsu CH, McCabe GP, McCabe LD, Peacock M, Weaver CM. Soluble maize fibre affects short-term calcium absorption in adolescent boys and girls: a randomised controlled trial using dual stable isotopic tracers. Br J Nutr. 2014;112(3):446-56. doi: 10.1017/S0007114514000981.PubMedUsed to support: Randomized crossover metabolic balance study in 24 adolescents aged 12 to 15 on a low-calcium diet: 12 g/day of PROMITOR Soluble Corn Fiber 70 for 3 weeks raised fractional calcium absorption by 12% versus control (0.664 versus 0.595), but calcium retention did not change. Bacteroidetes rose in stool. Tate & Lyle funded the study, took part in its design and reviewed the manuscript.
  4. Whisner CM, Martin BR, Nakatsu CH, Story JA, MacDonald-Clarke CJ, McCabe LD, McCabe GP, Weaver CM. Soluble Corn Fiber Increases Calcium Absorption Associated with Shifts in the Gut Microbiome: A Randomized Dose-Response Trial in Free-Living Pubertal Females. J Nutr. 2016;146(7):1298-306. doi: 10.3945/jn.115.227256.PubMedUsed to support: Double-blind randomized crossover trial in 28 girls aged 11 to 14 (registered NCT01660503, primary outcome calcium absorption): 10 or 20 g/day of fiber from PROMITOR SCF 85 for 4 weeks each raised calcium absorption by about 13% versus 0 g. Stool bacterial diversity and Parabacteroides rose with dose. The registry lists Tate & Lyle as a collaborator and Europe PMC lists Tate & Lyle funding.
  5. Jakeman SA, Henry CN, Martin BR, McCabe GP, McCabe LD, Jackson GS, Peacock M, Weaver CM. Soluble corn fiber increases bone calcium retention in postmenopausal women in a dose-dependent manner: a randomized crossover trial. Am J Clin Nutr. 2016;104(3):837-43. doi: 10.3945/ajcn.116.132761.PubMedUsed to support: Double-blind randomized crossover trial in 14 healthy postmenopausal women (NCT02416947): 10 and 20 g/day of fiber from soluble corn fiber for 50 days each improved bone calcium retention, traced with a calcium isotope, by 4.8% and 7% versus 0 g. Bone turnover markers NTx and osteocalcin did not change; bone-specific alkaline phosphatase rose 8% at 20 g. Bone density was not measured. The registry lists Tate & Lyle Health & Nutrition Sciences as a collaborator and Europe PMC lists Tate & Lyle funding. An erratum was published in 2017.
  6. Palacios C, Trak-Fellermeier MA, Hernandez J, Galvan R, Martinez-Motta P, Machi A, Sifre-Acosta N, Clayton PK, Hernandez Y, Martinez R, Gambon T, Bursac Z, Weaver CM. Effect of soluble corn fiber supplementation for 1 year on bone mass in children and adolescents: results from the MetA-Bone randomized clinical trial. Am J Clin Nutr. 2026;123(6):101305. doi: 10.1016/j.ajcnut.2026.101305.PubMedUsed to support: Randomized placebo-controlled trial in 177 children aged 9 to 14 with low calcium intake (NCT02916862): 12 g/day soluble corn fiber or maltodextrin placebo, with or without 600 mg calcium, for 1 year. The registered primary outcome, change in whole-body bone mineral content, did not differ between fiber and placebo in the registry-posted analysis (P = 0.377). In sex-stratified, adjusted analyses of completers, girls gained more whole-body bone mineral content and density on the fiber; boys did not, and no gain was seen when calcium was added. NICHD is the registry collaborator; Tate & Lyle supplied part of the PROMITOR fiber and the maltodextrin.
  7. Arasu K, Chang CY, Wong SY, Ong SH, Yang WY, Chong MHZ, Mavinkurve M, Khoo EJ, Chinna K, Weaver CM, Chee WSS. Effect of soluble corn fibre and calcium supplementation on bone mineral content and bone mineral density in preadolescent Malaysian children-a double-blind randomised controlled trial (PREBONE-Kids Study). Osteoporos Int. 2023;34(4):783-792. doi: 10.1007/s00198-023-06702-0.PubMedUsed to support: Double-blind randomized trial in 243 Malaysian children aged 9 to 11 (NCT03864172; primary outcomes total body and spine bone mineral density and content): 12 g/day soluble corn fiber, 600 mg calcium, both, or placebo for 1 year. At 12 months, changes in whole-body bone mineral content and density did not differ among groups; the authors concluded the fiber did not increase them. The registry lists Tate & Lyle as a collaborator and Europe PMC lists Tate & Lyle PLC funding.
  8. Wu KC, Cao S, Weaver CM, King NJ, Patel S, Kingman H, Sellmeyer DE, McCauley K, Li D, Lynch SV, Kim TY, Black DM, Shafer MM, Özçam M, Lin DL, Rogers SJ, Stewart L, Carter JT, Posselt AM, Schafer AL. Prebiotic to Improve Calcium Absorption in Postmenopausal Women After Gastric Bypass: A Randomized Controlled Trial. J Clin Endocrinol Metab. 2022;107(4):1053-1064. doi: 10.1210/clinem/dgab883.PubMedUsed to support: Double-blind randomized placebo-controlled trial in 20 postmenopausal women about 5 years after gastric bypass surgery: 20 g/day soluble corn fiber (24 g of Promitor Soluble Fiber 85, supplied by Tate & Lyle) or maltodextrin for 2 months. The primary outcome, change in fractional calcium absorption, did not differ between groups, nor did calcium hormones or bone turnover markers. Digestive symptoms were similar between groups. Funded mainly by NIH grants; Tate & Lyle was not involved in design, analysis or writing.
  9. Costabile A, Deaville ER, Morales AM, Gibson GR. Prebiotic Potential of a Maize-Based Soluble Fibre and Impact of Dose on the Human Gut Microbiota. PLoS One. 2016;11(1):e0144457. doi: 10.1371/journal.pone.0144457.PubMedUsed to support: Double-blind randomized parallel pilot study without a placebo arm, 8 adults per group: 8, 14 or 21 g/day of Promitor Soluble Corn Fiber (6, 12 or 18 g of fiber) for 14 days. Stool bifidobacteria rose by about 0.5 log units at the lowest dose; higher doses gave no further rise, and all doses were well tolerated. Funded by Tate & Lyle Ingredients Americas, which claims exclusive right of reference to the data.
  10. Boler BM, Serao MC, Bauer LL, Staeger MA, Boileau TW, Swanson KS, Fahey GC Jr. Digestive physiological outcomes related to polydextrose and soluble maize fibre consumption by healthy adult men. Br J Nutr. 2011;106(12):1864-71. doi: 10.1017/S0007114511002388.PubMedUsed to support: Randomized crossover study in 21 healthy men eating 21 g/day of PROMITOR soluble corn fiber (Tate & Lyle), polydextrose or no added fiber in snack bars for 21 days each. With the corn fiber, stool wet weight and bifidobacteria were higher and stool pH lower than with no added fiber, while bowel movement frequency and stool consistency did not differ. Flatulence, and to a lesser degree distention, rose with both fibers, and reflux scores were higher with the corn fiber; all tolerance scores stayed low. Supported by General Mills, which employed two authors.
  11. Alvarado DA, Holthaus TA, Martell S, Southey NL, Atallah M, Sarma R, Revilla D, Brown M, Mehta T, Khan NA, Holscher HD. Effects of Soluble Corn Fiber Consumption on Executive Functions and Gut Microbiota in Middle to Older Age Adults: A Randomized Controlled Crossover Trial. J Nutr. 2026;156(5):101473. doi: 10.1016/j.tjnut.2026.101473.PubMedUsed to support: Double-blind randomized crossover trial in 42 healthy adults aged 45 to 75 (NCT05066425): PROMITOR Soluble Fiber (22 g/day giving 18 g fiber) or maltodextrin for 4 weeks each. Of five registered primary cognitive measures, flanker reaction times were about 10 to 14 ms faster on the fiber, while flanker accuracy, brain-wave (P3) measures and relational memory did not differ; mood, stress and other test batteries also did not change. Parabacteroides rose about 4-fold; stool fatty acids, bowel frequency and stool consistency did not change, and gas scores rose. Funded by Tate & Lyle and USDA; Tate & Lyle supplied the sachets.
  12. Housez B, Cazaubiel M, Vergara C, Bard JM, Adam A, Einerhand A, Samuel P. Evaluation of digestive tolerance of a soluble corn fibre. J Hum Nutr Diet. 2012;25(5):488-96. doi: 10.1111/j.1365-277X.2012.01252.x.PubMedUsed to support: Double-blind placebo-controlled crossover tolerance study in 20 healthy adults of Promitor Soluble Gluco Fiber (Tate & Lyle) at rising doses, scored with a composite of digestive symptoms, stool frequency and consistency benchmarked against inulin. The highest dose meeting the tolerance criteria was 40 g of fiber taken at once and 65 g of fiber spread over the day.
  13. Risso D, Kaczmarczyk M, Laurie I, Mah E, Blonquist TM, Derrig L, Karnik K. Moderate intakes of soluble corn fibre or inulin do not cause gastrointestinal discomfort and are well tolerated in healthy children. Int J Food Sci Nutr. 2022;73(8):1104-1115. doi: 10.1080/09637486.2022.2133098.PubMedUsed to support: Tolerance study in children aged 3 to 9: soluble corn fiber at 3 to 8 g/day for 10 days was tolerated as well as inulin, with no differences in stool frequency, consistency or symptoms, and lower gas severity than inulin at 6 g/day in children aged 3 to 5. Four of the seven authors were Tate & Lyle employees and the others worked for the contract research firm Biofortis; Europe PMC lists Tate & Lyle funding.
  14. Canene-Adams K, Spence L, Kolberg LW, Karnik K, Liska D, Mah E. A Randomized, Double-Blind, Crossover Study to Determine the Available Energy from Soluble Fiber. J Am Coll Nutr. 2021;40(5):412-418. doi: 10.1080/07315724.2020.1790440.PubMedUsed to support: Double-blind randomized crossover study in 19 healthy young adults comparing breath hydrogen after 5, 10 or 15 g of PROMITOR Soluble Corn Fiber 70 or 85 with inulin. Breath hydrogen was lower than with inulin at every amount, and the authors calculated the available energy of the fiber portion at 0.2 kcal per gram. Four of the six authors worked for Tate & Lyle.
  15. Stewart ML, Nikhanj SD, Timm DA, Thomas W, Slavin JL. Evaluation of the effect of four fibers on laxation, gastrointestinal tolerance and serum markers in healthy humans. Ann Nutr Metab. 2010;56(2):91-8. doi: 10.1159/000275962.PubMedUsed to support: Single-blind crossover study in 20 healthy adults of 12 g/day of four fibers, including Promitor Soluble Corn Fiber, versus maltodextrin for 14 days each. All were well tolerated with mild to moderate symptoms; stool weight and blood markers did not change, and total short-chain fatty acids did not differ among treatments.
  16. Tate & Lyle. PROMITOR® Soluble Fibre (product page). Tate & Lyle. 2026;Accessed 2026. https://www.tateandlyle.com/ingredient/promitor-soluble-fibre.SourceUsed to support: Maker's product page, not PubMed-indexed. Describes PROMITOR as Tate & Lyle's corn-based soluble prebiotic fiber available at 70%, 85% or 90% fiber (70% grade: at least 70% fiber on a dry basis and under 10% sugars; 85% grade: under 2% sugars), in liquid, powder and agglomerated forms, declared as soluble corn fiber in most markets, and cites tolerance up to 65 g a day in divided portions in healthy adults.