Purpose: Findings from randomized controlled trials (RCTs) evaluating the effect of pulse intake on glycemic control are inconsistent and conclusive evidence is lacking. The aim of this study was to systematically review the impact of pulse consumption on post-prandial and long-term glycemic control in adults with and without type 2 diabetes (T2D). Methods: Databases were searched for RCTs, reporting outcomes of post-prandial and long-term interventions with different pulse types on parameters of glycemic control in normoglycemic and T2D adults. Effect size (ES) was calculated using random effect model and meta-regression was conducted to assess the impact of various moderator variables such as pulse type, form, dose, and study duration on ES. Results: From 3334 RCTs identified, 65 studies were eligible for inclusion involving 2102 individuals. In acute RCTs, pulse intake significantly reduced peak post-prandial glucose concentration in participants with T2D (ES – 2.90; 95%CI – 4.60, – 1.21; p ≤ 0.001; I² = 93%) and without T2D (ES – 1.38; 95%CI – 1.78, – 0.99; p ≤ 0.001; I² = 86%). Incorporating pulse consumption into long-term eating patterns significantly attenuated fasting glucose in normoglycemic adults (ES – 0.06; 95%CI – 0.12, 0.00; p ≤ 0.05; I² = 30%). Whereas, in T2D participants, pulse intake significantly lowered fasting glucose (ES – 0.54; 95%CI – 0.83, – 0.24; p ≤ 0.001; I² = 78%), glycated hemoglobin A1c (HbA_1c) (ES – 0.17; 95%CI – 0.33, 0.00; p ≤ 0.05; I² = 78) and homeostatic model assessment of insulin resistance (HOMA-IR) (ES – 0.47; 95%CI – 1.25, – 0.31; p ≤ 0.05; I² = 79%). Conclusion: Pulse consumption significantly reduced acute post-prandial glucose concentration > 1 mmol/L in normoglycemic adults and > 2.5 mmol/L in those with T2D, and improved a range of long-term glycemic control parameters in adults with and without T2D. PROSPERO registry number: (CRD42019162322).

Chickpeas are among the lowest glycaemic index carbohydrate foods eliciting protracted digestion and enhanced satiety responses. In vitro studies suggest that mechanical processing of chickpeas significantly increases starch digestion. However, there is little evidence regarding the impact of processing on postprandial glycaemic response in response to chickpea intake in vivo. Therefore, the aim of this study was to determine the effect of mechanical processing on postprandial interstitial glycaemic and satiety responses in humans. In a randomised crossover design, thirteen normoglycaemic adults attended 4 separate laboratory visits following an overnight fast. On each occasion, one of four test meals, matched for available carbohydrate content and consisting of different physical forms of chickpeas (whole, puree, and pasta) or control (mashed potato), was administered followed by a subsequent standardised lunch meal. Continuous glucose monitoring captured interstitial glucose responses, accompanied by periodic venous blood samples for retrospective analysis of C-peptide, glucagon like peptide-1 (GLP-1), ghrelin, leptin, resistin, and cortisol. Subjective appetite responses were measured by Visual Analogue Scale (VAS). Postprandial glycaemic responses were comparable between chickpea treatments albeit significantly lower than the control (p < 0.001). Similarly, all chickpea treatments elicited significantly lower C-peptide and GLP-1 responses compared to the control (p < 0.05), accompanied by enhanced subjective satiety responses (p < 0.05), whilst no significant differences in satiety hormones were detected among different intervention groups (p > 0.05). Chickpea consumption elicits low postprandial glycaemic responses and enhanced subjective satiety responses irrespective of processing methods.

Type 2 diabetes mellitus (T2DM) is a major public health concern associated with high mortality and reduced life expectancy. Since diabetes is closely linked with lifestyle, not surprisingly, nutritional intervention and increased physical activity could play a vital role in attenuating the problems related to diabetes. Protein hydrolysates (PHs) and their bioactive peptides (BP) have been shown to exert a wide range of biological effects, including antioxidative, antihypertensive, and in particular, hypoglycaemic activities. To better understand the efficacy of such interventions, a systematic review and meta-analysis of randomised controlled trials (RCTs) were performed concerning the influence of protein hydrolysates on glycaemic biomarkers in subjects with and without hyperglycaemia. Five different databases were used to search for RCTs. In total, 37 RCTs were included in the systematic review and 29 RCTs in the meta-analysis. The meta-analysis revealed a significant reduction in postprandial blood glucose response (PPGR) in normoglycaemic (−0.22 mmol/L; 95% CI −0.43, −0.01; p ≤ 0.05) and in hyperglycaemic adults (−0.88 mmol/L; 95% CI −1.37, −0.39; p ≤ 0.001) compared with the respective control groups. A meta-regression analysis revealed a dose-dependent response for PPGR following PH consumption in normoglycaemic adults, specifically for doses ≤ 30 g. The postprandial blood insulin responses (PPIR) were significantly higher after the ingestion of PHs in both the group with and the group without hyperglycaemia, respectively (23.05 mIU/L; 95% CI 7.53, 38.57; p ≤ 0.01 and 12.57 mIU/L; 95% CI 2.72, 22.41; p ≤ 0.01), compared with controls. In terms of long-term responses, there was a small but significant reduction in both fasting blood glucose (FBG) and fasting glycated haemoglobin (HbA1c) in response to PH compared with the control group (p < 0.05). The PHs significantly improved the parameters of glycaemia in adults and, hence, it may contribute to the management and regulation of the future risk of developing T2DM.

Coffee is one of the most popular beverages in the world, with potential health benefits and anti-diabetic qualities. Numerous bioactive substances found in coffee have been studied for their possible therapeutic benefits in controlling blood glucose. Given the ubiquitous use of coffee, this article aims to review the anti-diabetic characteristics of various coffee bioactive compounds such as chlorogenic acids, caffeic acid, quinic acid, ferulic acid, and caffeine. The modulation of glucose homeostasis, improvement of insulin sensitivity, suppression of gluconeogenesis, anti-inflammatory properties, and antioxidant activity are only a few of the several mechanisms of action that have been suggested. These qualities allow coffee polyphenols to potentially have antidiabetic effects, opening the door to prospective medicinal uses. The molecular mechanisms underpinning the effects of coffee polyphenols on insulin signaling pathways and glucose metabolism have been clarified by in vitro investigations. In animal studies, coffee polyphenols have positively affected pancreatic function, insulin resistance, and glucose regulation. Human studies have linked drinking coffee to a lower incidence of type 2 diabetes, better glycaemic management, and increased insulin sensitivity.

Background: Previous research has linked high coffee consumption to an increased risk of metabolic syndrome (MetS). This study aimed to assess the relationship between coffee consumption and MetS components among Saudi adults. Methods: A cross-sectional study was performed on adults who met at least three criteria for a MetS diagnosis. Data concerning demographics, lifestyle, sleeping patterns, medical health, anthropometric measurements, habitual coffee drinking, and lab levels for HDL-C, LDL-C, TC, TGs, HbA1c, and FBG were collected. Results: Of the 95 participants, 51% were women, 75.8% were >50 years old, 75.8% were obese, 62% were used to practicing physical activity, 74.5% never smoked, 56.4% slept < 7 h/day, and 89.5% were coffee consumers. Of these, 94.7% had high waist circumference, 63.2% had high BP, 47.4% had high FBG, 41.1% had low HDL, and 23.2% had high TGs. For coffee consumers, 37.6% drank a small cup, 34.5% drank coffee once daily, 89.4% drank Arabic coffee, and 75.3% added no additives. Conclusions: No significant association was found between coffee consumption patterns and any MetS component, with the exception of elevated TGs, which was strongly associated with coffee cup size and number of daily cups. Waist circumference and BMI had a strong positive correlation with coffee cup size, and there was a significant relationship between the number of daily cups, BMI, and TC. Further prospective studies are needed to establish a causal relationship.

Vitamin A deficiency (VAD) affects millions of people around the world, particularly in populations with limited dietary diversity. The present study aimed to develop β-carotene-fortified coconut oil using Pouteria campechiana (Canistel), which is an underutilized tropical fruit rich in β-carotene. A solvent-free fortification process was optimized using response surface methodology (RSM) with a central composite design to evaluate the effects of oil percentage (50–100% w/v) and heating temperature (30–60 °C) on β-carotene retention and oil quality. The quadratic model showed excellent fit (R² = 0.9970; lack of fit p = 0.6815), while optimum conditions were identified at 52.4 °C and 50% (w/w) oil, yielding a predicted β-carotene concentration of 2.22 µg/mL. The fortified oil exhibited significantly higher polyphenolic (17.37 ± 2.04 mg GAE/g), total flavonoid (11.33 ± 0.89 mg QE/g) contents, and antioxidant activity (9.78 ± 0.53 mg TE/g) compared with commercial coconut oil. The optimized oil demonstrated enhanced oxidative stability, reflected by lower peroxide (0.05 ± 0.01 meqO₂/kg) and acid values (0.10 ± 0.01 mg KOH/g). The validated quadratic model and optimized process produced a nutritionally enriched, stable coconut oil, supporting its use as a clean-label functional ingredient. These findings highlight the potential of β-carotene-fortified oils to deliver provitamin A and antioxidant benefits. Future studies should focus on evaluating the bioavailability, storage stability, and sensory acceptability of β-carotene enriched coconut oil to confirm its nutritional and commercial potential.