Diabetic foot ulcers (DFUs) rank among the most severe and costly complications of diabetes mellitus, affecting an estimated 15–25% of people with diabetes over their lifetime. These open sores or wounds, typically on the plantar surface of the foot, can lead to deep infection, hospitalization, and—in advanced cases—lower-limb amputation. The five-year mortality after a diabetes-related amputation exceeds that of many common cancers, underscoring the urgent need for effective prevention strategies (Armstrong et al., 2023). While glycemic control, daily foot inspections, and proper footwear remain the cornerstones of prevention, emerging research highlights the contribution of specific dietary components to skin integrity, circulation, and immune function. Among these, sesame seeds (Sesamum indicum) stand out for their dense nutritional profile and scientifically backed anti-inflammatory, antioxidant, and vascular-supportive properties. This article explores how incorporating sesame seeds into a diabetes-friendly diet may help reduce the risk of diabetic foot ulcers, supported by current evidence and practical guidance.

Understanding Diabetic Foot Ulcers: Pathophysiology and Risk Factors

Diabetic foot ulcers typically arise from the interplay of peripheral neuropathy, peripheral arterial disease (PAD), and impaired immune function driven by chronic hyperglycemia. Neuropathy—present in up to 50% of people with longstanding diabetes—causes loss of protective sensation in the feet. Minor cuts, blisters, or areas of pressure go unnoticed and can quickly deepen into ulcers. Concurrently, PAD reduces blood flow to the extremities, limiting oxygen and nutrient delivery to tissues and impairing the healing response. Chronic hyperglycemia further predisposes to infection by compromising neutrophil function and promoting a pro-inflammatory state. If untreated, an ulcer can extend to bone (osteomyelitis), requiring extensive debridement, prolonged antibiotic therapy, or amputation. The economic burden is substantial: the cost of managing a single DFU episode can exceed $10,000, and more than 80% of diabetes-related lower-extremity amputations are preceded by an ulcer (Rice et al., 2022). Prevention therefore demands a multidisciplinary approach that includes not only foot-specific interventions but also nutritional strategies that support vascular health, skin integrity, and glycemic stability.

Nutritional Profile of Sesame Seeds

Sesame seeds are among the oldest oilseed crops, prized for their nutty flavor and impressive nutrient density. A 30-gram serving (about 3 tablespoons) provides a rich array of macro- and micronutrients that are directly relevant to wound prevention and healing:

  • 5 g protein, including methionine—an amino acid important for collagen cross-linking
  • 14 g fat, predominantly polyunsaturated (linoleic acid) and monounsaturated (oleic acid) fatty acids
  • 4 g dietary fiber
  • 350 mg calcium (35% of the RDA)
  • 100 mg magnesium (24% of RDA)
  • 4.2 mg zinc (38–52% of RDA, depending on sex)
  • 2.3 mg iron (13% of RDA)
  • Significant amounts of vitamin E (tocopherols) and unique lignans—sesamin, sesamolin, and sesamol—with potent antioxidant activity

The synergistic combination of zinc, calcium, magnesium, and essential fatty acids is particularly relevant for skin barrier function and wound healing. Zinc serves as a cofactor for over 300 enzymes involved in collagen synthesis, cell proliferation, and immune defense. Magnesium supports endothelial function and vasodilation, improving blood flow to the extremities. Calcium contributes to keratinocyte differentiation and maintenance of the skin barrier. Moreover, the lignans found in sesame seeds have demonstrated anti-inflammatory, antioxidant, and even insulin-sensitizing properties in preclinical and clinical studies.

Mechanisms of Action: How Sesame Seeds May Reduce Ulcer Risk

Anti-Inflammatory and Antioxidant Effects

Chronic low-grade inflammation is a hallmark of diabetes and a key driver of tissue damage in the feet. Hyperglycemia promotes the formation of advanced glycation end-products (AGEs) and triggers oxidative stress, which in turn activates pro-inflammatory cytokines such as tumor necrosis factor-alpha (TNF-α), interleukin-6 (IL-6), and C-reactive protein (CRP). Sesame lignans, particularly sesamin and sesamolin, have been shown to suppress these inflammatory markers in both animal models and human trials. A 2023 meta-analysis of randomized controlled trials found that sesame seed or sesame oil consumption significantly reduced serum CRP and TNF-α levels (Rostami et al., 2023). Furthermore, sesamol—a metabolite of sesamolin—scavenges free radicals directly, protecting endothelial cells from oxidative injury. In diabetic animal models, dietary sesame oil has been associated with improved wound closure rates and reduced markers of oxidative damage in skin tissue.

Supporting Skin Barrier Function and Repair

The skin of a diabetic foot is often dry, cracked, and prone to fissures due to autonomic neuropathy, reduced sebum production, and impaired keratinocyte function. Zinc and essential fatty acids from sesame seeds help maintain the lipid bilayer of keratinocytes, reducing transepidermal water loss and preserving barrier integrity. Zinc also accelerates re-epithelialization by promoting keratinocyte migration and angiogenesis. Clinical studies have demonstrated that oral zinc supplementation shortens healing time in chronic wounds, including diabetic ulcers (Lansdown et al., 2020). While sesame seeds cannot replace medical zinc therapy in frank deficiency, their regular intake provides a steady, dietary supply of this critical mineral along with complementary nutrients—calcium, magnesium, and vitamin E—that support collagen formation and cell turnover.

Improving Circulation and Vascular Health

Peripheral arterial disease affects 20–50% of people with diabetes, severely limiting oxygen and nutrient delivery to the feet. Magnesium and unsaturated fats in sesame seeds have been linked to improved endothelial function, reduced arterial stiffness, and lower blood pressure. A 2021 meta-analysis of 11 randomized trials reported that sesame seed consumption significantly reduced systolic blood pressure (by approximately 6.5 mmHg) and LDL cholesterol (by 16.7 mg/dL) compared to control groups (Sadeghi et al., 2021). Better blood pressure control reduces shear stress on small vessels, while lower LDL levels slow atherogenesis. Although no large-scale trial has directly assessed whether dietary sesame reduces diabetic foot ulcer incidence, the vascular benefits are clearly relevant to ulcer prevention and healing. Additionally, magnesium’s role in vasodilation may counteract the vasoconstrictive effects of endothelial dysfunction in diabetes.

Potential Glycemic Benefits

Stable blood glucose is the foundation of ulcer prevention. Sesame seeds have a low glycemic index, and their fiber and fat content slows gastric emptying, blunting postprandial glucose spikes. Beyond these macronutrient effects, some evidence suggests that sesame lignans may improve insulin sensitivity by activating peroxisome proliferator-activated receptor gamma (PPAR-γ), similar to thiazolidinedione medications. A 2020 randomized controlled trial in patients with type 2 diabetes found that consuming 30 g of whole sesame seeds daily for eight weeks led to significant reductions in fasting blood glucose (by 17 mg/dL) and HbA1c (by 0.7%) compared with a control group (Asadi et al., 2020). These findings suggest that regular sesame intake may contribute to glycemic control, which in turn reduces neuropathic progression and infection risk.

Clinical Evidence and Research Gaps

While the mechanistic rationale is robust, direct clinical evidence linking sesame seeds to reduced DFU incidence remains limited. Most existing data come from animal studies or trials using surrogate endpoints (e.g., wound healing rates in diabetic rats, or improvements in biomarkers of inflammation, oxidative stress, and lipid profiles). A 2019 case series described accelerated healing of chronic DFUs in patients who consumed 20 g of ground sesame seeds daily as an adjunct to standard wound care (Sharma et al., 2019). However, the study included only 12 participants and lacked a control group, limiting its generalizability. Larger, randomized, placebo-controlled trials with DFU incidence or healing time as primary endpoints are needed to confirm a causal relationship. Despite this research gap, the safety, affordability, and nutritional value of sesame seeds are well-established, making them a sensible, low-risk adjunct to comprehensive diabetes management.

Practical Incorporation of Sesame Seeds into a Diabetic Diet

Evidence-Based Tips for Daily Use

Sesame seeds are versatile and can be added to meals without significant caloric overload. The following strategies maximize nutrient absorption while maintaining palatability:

  • Sprinkle toasted sesame seeds over steamed vegetables, salads, or roasted dishes for added crunch and flavor.
  • Blend 1–2 tablespoons of sesame seeds or tahini into smoothies or yogurt; pairing with berries provides synergistic antioxidants.
  • Use tahini (sesame paste) as a spread on whole-grain crackers, rice cakes, or as a dip for raw vegetable sticks.
  • Incorporate ground sesame seeds into low-carb baking—sprinkle over flatbreads, add to muffin batter, or mix into meatballs/veggie burgers.
  • Add whole sesame seeds to stir-fries, rice bowls, or quinoa dishes near the end of cooking to preserve heat-sensitive lignans.
  • Prepare sesame milk by blending soaked seeds with water; this dairy alternative is naturally low in carbohydrates and can be used in smoothies or cereal.

A daily serving of 15–30 g (1–2 tablespoons) is both effective and safe for most individuals. To maximize nutrient absorption, seeds should be chewed thoroughly or ground (e.g., as tahini or sesame powder). Whole seeds may pass undigested in some people, limiting mineral bioavailability. For those with dental issues or chewing difficulties, tahini or cold-pressed sesame oil are convenient alternatives. Note that sesame seeds are calorie-dense (approximately 180 kcal per 30 g); portion control is important for weight management. People with a history of oxalate kidney stones should consume sesame seeds in moderation, as they contain moderate levels of oxalates. Sesame allergy is increasingly common and can be severe; individuals with known allergies should avoid sesame entirely. Always consult a registered dietitian or endocrinologist before making significant dietary changes, especially if taking anticoagulants (e.g., warfarin, due to vitamin K content) or medications that affect magnesium or zinc levels.

Precautions and Potential Interactions

Sesame seeds are generally safe, but the following precautions merit attention:

  • Diverticulitis: Individuals with acute diverticulitis should avoid seeds until cleared by a physician, as seeds may become trapped in diverticula.
  • Gastrointestinal upset: The high fiber content can cause bloating or gas if introduced too quickly. Gradually increase intake and drink adequate fluids.
  • Phytate content: Raw sesame seeds contain phytates that can bind minerals and reduce absorption. Toasting or soaking reduces phytate levels and improves bioavailability of zinc and iron.
  • Sugar-coated products: Avoid honey-glazed or caramelized sesame snacks, which add unnecessary sugars. Stick to plain, organic, unhulled seeds when possible; hulled seeds offer slightly higher calcium availability.
  • Cooking with sesame oil: Unrefined sesame oil has a low smoke point (around 350°F / 175°C) and should not be used for deep frying. Use it in dressings or light sautéing to preserve its beneficial compounds.

Future Directions and Research Needs

The potential of sesame seeds as a dietary adjunct to prevent diabetic foot ulcers warrants further investigation. Future research should prioritize large, randomized controlled trials with DFU incidence as the primary endpoint, along with adequate follow-up to assess ulcer recurrence and amputation rates. Mechanistic studies could explore the dose-response relationship of sesame lignans on wound healing biomarkers and peripheral circulation. Additionally, research on sesame oil’s topical application in combination with standard wound care may reveal synergistic benefits. Until such trials are completed, the existing evidence from inflammatory biomarkers, glycemic control, and vascular function supports the inclusion of sesame seeds in diabetes-friendly eating patterns as a safe, nutrient-dense strategy that complements—but does not replace—standard medical care.

Conclusion

Diabetic foot ulcers remain a preventable yet devastating complication of diabetes. While pharmacological, surgical, and foot-care interventions are essential, nutritional approaches offer an accessible, low-cost opportunity to support multiple pathways involved in ulcer prevention. Sesame seeds, with their anti-inflammatory lignans, antioxidant vitamin E, and a rich supply of zinc, magnesium, calcium, and healthy fats, address key risk factors: chronic inflammation, oxidative stress, poor circulation, impaired skin barrier function, and glycemic instability. Incorporating 1–2 tablespoons of sesame seeds (or tahini) into a balanced diet is a simple, evidence-informed strategy that reinforces existing prevention efforts. Combined with routine foot self-exams, appropriate footwear, and tight glucose management, sesame seeds can be a valuable part of a proactive, whole-person approach to preserving foot health in diabetes. As the research base continues to grow, the ancient seed may prove to be a modern-day ally in the fight against diabetic foot complications.