Best Protein Foods for Diabetics (2026)

This page covers nutrition information only. Always discuss dietary changes with your GP or diabetes care team.

Protein is one of the most useful tools in blood sugar management — not because it lowers blood sugar directly, but because it slows gastric emptying, which reduces the speed at which carbohydrates enter the bloodstream after a meal. Including protein at every meal blunts post-meal glucose spikes without requiring carbohydrate restriction.

The practical priority: choose protein sources that are naturally low in carbohydrates, contain no added sugar, and don’t come packaged with refined starches or sauces. Almost every protein source that creates a blood sugar problem does so because of what it’s paired with, not the protein itself.

Quick Reference: Protein Foods by Carb Content

Carb counts are approximate and vary by brand/preparation.

Best Whole Food Protein Sources for Diabetics

Eggs

The most diabetes-friendly protein source: 0g carbohydrates, 6g protein per egg, and no effect on blood sugar regardless of preparation (provided you’re not frying in refined oil with toast). The concern about eggs and heart disease that dominated the 2000s has been significantly revised — current evidence does not support limiting eggs for cardiovascular risk in healthy adults.

Best for: Breakfast, snacks, meal prep. Hard-boil a batch at the start of the week.

Watch out for: Pre-made egg dishes, omelette fillings, and flavoured egg products that add hidden carbohydrates.

Plain Greek Yoghurt

Greek yoghurt contains 15–20g protein per 170g serving from a slow-digesting casein/whey mix. The carbohydrates (5–9g) are lactose — natural milk sugar — which has a lower glycaemic impact than glucose or sucrose. Key word: plain. Flavoured yoghurts add 15–25g sugar per serving and are a poor choice for blood sugar management.

Best options: Chobani Plain Non-Fat (17g protein, 7g carbs), Fage Total 0% (18g protein, 7g carbs), store-brand plain Greek.

Best for: Breakfast with nuts and berries, post-workout, snack with protein powder stirred in.

Cottage Cheese

Often overlooked, cottage cheese delivers 14g protein per half-cup (113g) at only 3–4g carbohydrates. The protein is predominantly slow-digesting casein, giving sustained satiety. Low-sodium versions exist for those managing blood pressure alongside blood sugar.

Best for: As a dip with raw vegetables, mixed with berries, or as a savoury side with protein at lunch or dinner.

Canned Tuna and Salmon

Canned fish is the highest-protein zero-carb food available at grocery store pricing: 25–28g protein per 100g, 0g carbohydrates. Canned salmon adds omega-3 fatty acids, which have modest evidence for improving insulin sensitivity. Both store indefinitely and require no refrigeration until opened.

Best for: Lunches, quick protein additions to salads, emergency protein when travelling.

Watch out for: Tuna packaged in oil with added salt, or flavoured varieties with sauce (check label for carbs).

Chicken and Turkey Breast

Lean poultry is the highest-volume protein source for meal prep: 27–31g protein per 100g cooked, 0g carbohydrates, low fat. The preparation method determines the blood sugar impact — a grilled chicken breast is negligible; chicken nuggets or breaded cutlets are not.

Best for: Batch cooking for the week. 400g cooked chicken breast provides ≈120g protein with zero carb contribution to the day.

Tempeh

For plant-based diets, tempeh is the highest-protein whole soy food: 19g protein and 7g carbs per 100g. Unlike tofu, tempeh is fermented — the fermentation process reduces the phytic acid that inhibits mineral absorption, and some research suggests fermented soy may have a more favourable blood sugar response than unfermented equivalents.

Best for: Stir-fries, grain bowls, as a meat substitute in dishes where texture matters.

Legumes: Higher Carb but Still Valuable

Lentils, chickpeas, and black beans contain 7–9g protein per half-cup cooked, but also 18–22g carbohydrates. The carbohydrates are mostly complex starches and fibre, which digest slowly — lentils have a glycaemic index of approximately 29, well below white rice (72) or white bread (75).

For people with diabetes who are not on a strict low-carb protocol, legumes are an effective way to increase plant protein without creating large blood sugar spikes, provided portions are managed. Half a cup is a significantly different portion from a large bowl.

Protein Powder for Diabetics: What Works

Protein powder is a practical tool for people with diabetes who struggle to hit protein targets through food alone. The criteria are simple: check total carbohydrates and sugar per serving, not just protein content.

Good choices

Whey protein isolate (Isopure Zero Carb, Dymatize ISO100): 0–2g carbs, 0g sugar, 25g protein per serving. The most diabetes-friendly category of protein powder — essentially pure protein with no blood sugar impact.

Plain whey concentrate (ON Gold Standard Whey): 3g carbs, 1g sugar per scoop. Minimal blood sugar impact; the carbohydrates come partly from lactose.

Unflavoured pea or rice protein (Naked Pea, Bulk Supplements pea protein): 1–3g carbs per serving, no added sugar. Good plant-based option with minimal glycaemic impact.

Avoid

Mass gainers: 200–300g carbohydrates per serving, predominantly maltodextrin (glycaemic index 85–105). Designed to spike blood sugar — the exact opposite of what diabetes management requires.

Flavoured meal replacement powders with maltodextrin: often labelled “low sugar” while containing significant carbohydrates. Check total carbs, not just the sugar line.

Protein bars with sugar alcohols: maltitol (common in protein bars) still raises blood sugar, though less than sugar. Check total carbs and look for erythritol or stevia-sweetened options instead.

Frequently Asked Questions

Does protein raise blood sugar? Pure protein causes a small, slow glucose rise via gluconeogenesis — far smaller than carbohydrates. High-quality protein sources (eggs, plain yoghurt, lean meat, whey isolate) have minimal practical impact on blood sugar for most people with type 2 diabetes.

Which protein powder is best for diabetics? Whey isolate — Isopure Zero Carb (25g protein, 100 calories, 0g carbs) or Dymatize ISO100 (25g protein, ≈110 calories, 2g carbs). Both have negligible blood sugar impact.

Are protein bars okay for diabetics? It depends heavily on the bar. Quest Bars (1–4g sugar, 12–15g fibre, 20g protein) are among the better options. Clif Builder’s (21g sugar) and most convenience store protein bars are poor choices. Check total carbs and sugar alcohols — maltitol is not sugar-free in practice.

Does protein help manage blood sugar? Yes. Protein consumed alongside carbohydrates slows digestion and blunts the blood sugar spike. Including protein at every meal (not just high-protein days) is a consistent and evidence-supported blood sugar management strategy.

What to Read Next

• High Protein Foods — full list of protein-dense whole foods
• High Protein Snacks — snack options with macros compared
• Best Protein Bars — which bars are low-sugar and appropriate for blood sugar management
• Cheap High Protein Foods — budget protein sources for daily use
• Protein Powder for Weight Loss — protein in a calorie deficit

Last reviewed: May 2, 2026 by the protein.supply editorial team.