Purpose
Since Michael Snyderβs research suggests that each of the four subtypes of Type 2 diabetes (or prediabetes) may benefit from tailored dietary strategies. While research on exact food prescriptions by subtype is still emerging, we can draw on known physiology of each category and existing nutritional science.
Hereβs a practical breakdown:
1. Muscle Insulin Resistance
Problem: Muscles donβt efficiently take in glucose in response to insulin. Goal: Improve muscle sensitivity to insulin and support glucose uptake.
Best foods:
- Lean protein + low-glycemic carbs β e.g., salmon with quinoa and leafy greens (protein helps muscles respond better, and slow carbs reduce spikes).
- Magnesium-rich foods (linked to insulin sensitivity) β spinach, pumpkin seeds, almonds.
- Berries & citrus (rich in antioxidants) β counter oxidative stress in muscle tissue.
2. Hepatic (Liver) Insulin Resistance
Problem: The liver continues to release glucose even when it shouldnβt. Goal: Reduce liver fat and stabilize glucose output.
Best foods:
- Fatty fish (omega-3s) β salmon, sardines, mackerel (reduce liver inflammation and fat buildup).
- High-fiber foods β oats, lentils, beans, chia seeds (improve hepatic glucose regulation).
- Coffee & green tea (without added sugar) β associated with lower risk of fatty liver.
- Leafy greens & cruciferous vegetables β kale, broccoli, Brussels sprouts (support liver detox pathways).
3. Ξ²-Cell Dysfunction
Problem: Pancreatic Ξ²-cells canβt produce enough insulin. Goal: Reduce insulin demand and protect Ξ²-cell health.
Best foods:
- Low-carb or low-glycemic foods β cauliflower rice, zucchini noodles, legumes.
- Nuts and seeds β walnuts, flaxseed, chia (healthy fats reduce insulin spikes).
- Polyphenol-rich foods β blueberries, green tea, dark chocolate (β₯70% cocoa) β shown to support Ξ²-cell survival in some studies.
- Olive oil & avocados β healthy monounsaturated fats that keep blood sugar stable.
4. Impaired In-cretin Action
Problem: Gut hormones (GLP-1, GIP) donβt work well to trigger insulin release after meals. Goal: Support gut health and boost natural in-cretin function.
Best foods:
- Fermented foods β yogurt with live cultures, kefir, kimchi, sauerkraut (improve gut microbiome, linked to in-cretin response).
- High-fiber foods β apples, beans, lentils (slow carb absorption, improve GLP-1 response).
- Resistant starch (feeds good gut bacteria) β cooked then cooled potatoes, green bananas.
- Protein with meals β chicken, tofu, eggs (boosts post-meal GLP-1 and satiety).
β
General across all subtypes:
- Avoid ultra-processed foods, sugary drinks, and refined carbs.
- Emphasize whole foods, balanced macronutrients, and portion control.
- Physical activity (especially resistance training) amplifies the effect of diet in all groups.
Foods for Four Diabetic Subtypes β Grouped by Category
Glycemic Index (GI)
The Glycemic Index (GI) in diabetes is a ranking system (0β100) for carbohydrate-containing foods that measures how quickly they raise blood glucose levels compared to a reference food, such as white bread or glucose. Foods with a low GI (< 55) are digested slowly, causing a gradual rise in blood sugar, while high GI foods ((> 70) cause rapid spikes.Β
Legend: β
= recommended for that subtype.
GI values are approximate (whole foods; plain/unsweetened preparations).
Proteins (Animal & Dairy)
| Chicken breast |
0 |
β
|
|
|
|
| Cottage cheese (unsweetened, low-fat) |
0 |
β
|
|
|
|
| Eggs |
0 |
β
|
|
|
|
| Greek yogurt (unsweetened) |
0 |
β
|
|
|
|
| Mackerel |
0 |
|
β
|
|
|
| Salmon |
0 |
β
|
β
|
|
|
| Sardines |
0 |
|
β
|
|
|
| Tempeh |
0 |
β
|
|
|
|
| Tofu |
0 |
β
|
|
|
|
| Trout |
0 |
|
β
|
|
|
| Tuna (fresh) |
0 |
|
β
|
|
|
| Turkey breast |
0 |
β
|
|
|
|
Legumes & Pulses
| Black beans |
30 |
β
|
β
|
β
|
β
|
| Chickpeas |
28 |
β
|
β
|
β
|
β
|
| Edamame |
15 |
β
|
|
|
|
| Kidney beans |
29 |
β
|
β
|
β
|
β
|
| Lentils |
32 |
β
|
β
|
β
|
β
|
Grains, Pasta & Starches (Low-GI Emphasis)
| Barley |
28 |
β
|
β
|
|
|
| Brown rice |
50 |
β
|
|
|
|
| Oats (steel-cut) |
42 |
β
|
β
|
|
|
| Quinoa |
53 |
β
|
β
|
|
|
| Sweet potato (boiled) |
44 |
β
|
|
|
|
| Whole-wheat pasta (al dente) |
40β45 |
β
|
|
|
|
Leafy Greens & Cruciferous Veg
| Arugula |
15 |
β
|
β
|
|
|
| Broccoli |
10 |
β
|
β
|
β
|
β
|
| Brussels sprouts |
15 |
|
β
|
|
|
| Cabbage |
10 |
|
β
|
β
|
β
|
| Cauliflower |
10 |
β
|
β
|
β
|
β
|
| Kale |
15 |
β
|
β
|
|
|
| Spinach |
15 |
β
|
β
|
β
|
β
|
Other Non-Starchy Veg & Low-Carb Swaps
| Cauliflower rice |
10 |
|
|
β
|
β
|
| Eggplant |
15 |
|
|
β
|
β
|
| Zucchini noodles |
15 |
|
|
β
|
β
|
Fruits (Low to Moderate GI)
| Apple |
36 |
β
|
|
|
|
| Blackberries |
25 |
β
|
|
β
|
β
|
| Blueberries |
53 |
β
|
|
β
|
β
|
| Cherries |
22 |
β
|
|
|
|
| Grapefruit |
25 |
β
|
|
|
|
| Kiwi |
50 |
β
|
|
|
|
| Orange |
43 |
β
|
|
|
|
| Peaches |
42 |
β
|
|
|
|
| Pears |
38 |
β
|
|
|
|
| Plums |
24 |
β
|
|
|
|
| Pomegranate |
35 |
β
|
|
|
|
| Raspberries |
32 |
β
|
|
β
|
β
|
| Strawberries |
41 |
β
|
|
β
|
β
|
Nuts & Seeds
| Almonds |
10 |
β
|
|
β
|
β
|
| Brazil nuts |
10 |
β
|
|
|
|
| Cashews |
25 |
β
|
|
β
|
β
|
| Chia seeds |
1 |
|
β
|
β
|
β
|
| Flaxseeds |
10 |
β
|
β
|
β
|
β
|
| Hemp seeds |
5 |
|
|
β
|
β
|
| Macadamia nuts |
10 |
|
|
β
|
β
|
| Pumpkin seeds |
10 |
β
|
|
β
|
β
|
| Sesame seeds |
35 |
|
|
β
|
β
|
| Sunflower seeds |
20 |
β
|
|
β
|
β
|
| Walnuts |
15 |
β
|
|
β
|
β
|
Beverages (Unsweetened)
| Black tea |
0 |
|
β
|
β
|
β
|
| Coffee (black) |
0 |
|
β
|
|
|
| Green tea / Matcha |
0 |
|
β
|
β
|
β
|
| Herbal teas (e.g., chamomile, peppermint) |
0 |
|
β
|
|
|
| Yerba mate |
0 |
|
β
|
|
|
Oils & Healthy Fats
| Avocado |
15 |
β
|
|
β
|
β
|
| Olive oil |
0 |
|
|
β
|
β
|
Other
| Dark chocolate (β₯70% cocoa) |
25 |
|
|
β
|
β
|
Notes
- Muscle IR: emphasize lean proteins, low-GI carbs, magnesium-rich foods, and antioxidant-rich fruits.
- Hepatic IR: emphasize omega-3 fish, unsweetened coffee/green tea, leafy & cruciferous veg, and soluble-fiber foods (oats, barley, legumes, flax/chia).
- Ξ²-Cell Dysfunction: emphasize low-carb/low-GI choices, nuts/seeds, polyphenol-rich foods, olive oil & avocado.
- Impaired Incretin Action: similar to Ξ²-cell focusβlow-carb/low-GI, nuts/seeds, polyphenols, healthy fats.
Appendix I: Suggested Food for Subtypes
1. Muscle Insulin Resistance
1.1 Lean Protein + Low-Glycemic Carbs
Proteins (GI = 0 unless mixed with sauces/carbs):
- Salmon
- Chicken breast
- Turkey breast
- Eggs
- Tofu
- Tempeh
- Greek yogurt (unsweetened)
- Cottage cheese (unsweetened, low-fat)
Low-Glycemic Carbs (GI β€ 55):
| Broccoli, cauliflower, zucchini, cucumber |
10β20 |
| Leafy greens (spinach, kale, arugula, lettuce) |
15 |
| Barley |
28 |
| Chickpeas |
28 |
| Kidney beans |
29 |
| Black beans |
30 |
| Lentils |
32 |
| Whole wheat pasta (al dente) |
40β45 |
| Steel-cut oats |
42 |
| Sweet potato (boiled) |
44 |
| Brown rice |
50 |
| Quinoa |
53 |
1.2. Magnesium-Rich Foods
(Magnesium supports insulin sensitivity & muscle function)
| Pumpkin seeds |
10 |
| Almonds |
10 |
| Brazil nuts |
10 |
| Flaxseeds |
10 |
| Spinach |
15 |
| Walnuts |
15 |
| Edamame |
15 |
| Avocado |
15 |
| Sunflower seeds |
20 |
| Cashews |
25 |
| Black beans |
30 |
1.3. Antioxidant-Rich Fruits
(Rich in vitamin C, polyphenols, and flavonoidsβcombat oxidative stress)
| Lemon |
Citrus |
20 |
| Lime |
Citrus |
20 |
| Cherries |
Other fruit |
22 |
| Plums |
Other fruit |
24 |
| Grapefruit |
Citrus |
25 |
| Blackberries |
Berries |
25 |
| Raspberries |
Berries |
32 |
| Pomegranate |
Other fruit |
35 |
| Apples |
Other fruit |
36 |
| Pears |
Other fruit |
38 |
| Strawberries |
Berries |
41 |
| Peaches |
Other fruit |
42 |
| Orange |
Citrus |
43 |
| Kiwi |
Other fruit |
50 |
| Blueberries |
Berries |
53 |
β
Summary Table (Expanded)
| Protein |
Salmon, chicken, turkey, eggs, tofu, Greek yogurt |
0 |
| Low-glycemic carbs |
Quinoa (53), lentils (32), chickpeas (28), black beans (30), barley (28), sweet potato (44), oats (42), brown rice (50), leafy greens (~15) |
β€55 |
| Magnesium-rich |
Spinach (15), pumpkin seeds (10), almonds (10), cashews (25), walnuts (15), flaxseeds (10), avocado (15), sunflower seeds (20), edamame (15) |
Low |
| Antioxidant-rich fruits |
Berries (25β53), citrus (20β43), apples (36), pears (38), cherries (22), plums (24), kiwi (50), pomegranate (35) |
Lowβmoderate |
2. Hepatic (Liver) Insulin Resistance
2.1 Fatty Fish (Omega-3s)
| Salmon |
0 |
Pure protein/fat, no carbohydrates |
| Sardines |
0 |
Pure protein/fat, no carbohydrates |
| Mackerel |
0 |
Pure protein/fat, no carbohydrates |
| Trout |
0 |
Omega-3 rich, very low carb |
| Herring |
0 |
Omega-3 rich, very low carb |
| Anchovies |
0 |
Omega-3 rich, very low carb |
| Tuna (fresh) |
0 |
Omega-3 rich, very low carb |
2.2 Coffee & Green Tea (Unsweetened)
| Black coffee |
0 |
No carbohydrates |
| Green tea |
0 |
Contains polyphenols |
| Black tea |
0 |
Contains antioxidants |
| Herbal tea (chamomile, peppermint) |
0 |
Naturally caffeine-free |
| Matcha tea |
0 |
Concentrated green tea antioxidants |
| Yerba mate |
0 |
Contains polyphenols and mild caffeine |
2.3 Leafy Greens & Calciferous Vegetables
| Broccoli |
10 |
Cruciferous vegetable, detox support |
| Cabbage |
10 |
Cruciferous vegetable, detox support |
| Cauliflower |
10 |
Cruciferous vegetable, detox support |
| Kale |
15 |
Leafy green, nutrient dense |
| Brussels sprouts |
15 |
Cruciferous vegetable |
| Spinach |
15 |
Leafy green, iron & magnesium source |
| Arugula |
15 |
Leafy green, phytonutrient rich |
β
Summary Table
| Fatty fish (Omega-3s) |
Salmon, sardines, mackerel |
0 |
Trout, herring, anchovies, tuna |
| High-fiber foods |
Oats (42), lentils (32), beans (28β30), chia seeds (1) |
Low |
Barley, quinoa, flaxseeds, psyllium husk |
| Coffee & green tea |
Coffee (0), green tea (0) |
0 |
Black tea, herbal teas, matcha, yerba mate |
| Leafy greens & cruciferous |
Kale (15), broccoli (10), Brussels sprouts (15) |
Low |
Spinach, cabbage, cauliflower, arugula |
3. Ξ²-Cell Dysfunction
3.1 Low-Carb or Low-Glycemic Foods
| Broccoli |
10 |
Low-carb vegetable, supports insulin sensitivity |
| Cabbage |
10 |
Low-carb vegetable, fiber rich |
| Cauliflower rice |
10 |
Low-carb grain substitute |
| Zucchini noodles |
15 |
Low-carb pasta substitute |
| Eggplant |
15 |
Low-carb vegetable, fiber rich |
| Spinach |
15 |
Leafy green, magnesium rich |
| Chickpeas |
28 |
Legume, fiber & protein |
| Kidney beans |
29 |
Legume, fiber & protein |
| Black beans |
30 |
Legume, fiber & protein |
| Lentils |
32 |
Legume, fiber & protein |
3.2 Nuts and Seeds
| Chia seeds |
1 |
Very low GI, high fiber & omega-3 |
| Flaxseed |
10 |
Omega-3 rich, improves insulin sensitivity |
| Almonds |
10 |
Healthy fats, slows glucose absorption |
| Pumpkin seeds |
10 |
Magnesium rich |
| Walnuts |
15 |
Omega-3 rich |
| Sunflower seeds |
20 |
Healthy fats & vitamin E |
| Cashews |
25 |
Moderate carb nut |
3.3 Polyphenol-Rich Foods
| Green tea |
0 |
High antioxidant, improves insulin signaling |
| Black tea |
0 |
Antioxidant support |
| Dark chocolate (β₯70% cocoa) |
25 |
Polyphenol rich |
| Blackberries |
25 |
High fiber & antioxidant |
| Raspberries |
32 |
High fiber & antioxidant |
| Strawberries |
41 |
Vitamin C & antioxidant |
| Blueberries |
53 |
Polyphenol rich, moderate GI |
3.4 Olive Oil & Avocados
| Olive oil |
0 |
Monounsaturated fat, reduces inflammation |
| Hemp seeds |
5 |
Omega-3 & omega-6 balance |
| Almonds |
10 |
Healthy monounsaturated fats |
| Macadamia nuts |
10 |
Very high monounsaturated fat |
| Avocado |
15 |
Fiber + healthy fat |
| Sesame seeds |
35 |
Healthy fat, mineral rich |
β
Summary Table
| Low-carb/low-glycemic |
Cauliflower rice (10), zucchini noodles (15), legumes 28β32 |
Low |
Broccoli, cabbage, eggplant, spinach |
| Nuts & seeds |
Walnuts (15), flaxseed (10), chia (1) |
Very Low |
Almonds, pumpkin seeds, sunflower seeds, cashews |
| Polyphenol-rich |
Blueberries (53), green tea (0), dark chocolate β₯70% (25) |
LowβModerate |
Strawberries, raspberries, blackberries, black tea |
| Healthy fats (mono-unsat) |
Olive oil (0), avocado (15) |
Very Low |
Almonds, macadamia nuts, sesame seeds, hemp seeds |
4. Impaired In-cretin Action
4.1 Low-Carb or Low-Glycemic Foods
| Broccoli |
10 |
Supports gut hormone regulation |
| Cabbage |
10 |
Fiber rich, improves digestion |
| Cauliflower rice |
10 |
Low-carb grain substitute |
| Zucchini noodles |
15 |
Low-carb pasta substitute |
| Eggplant |
15 |
Fiber rich vegetable |
| Spinach |
15 |
Magnesium supports glucose metabolism |
| Chickpeas |
28 |
Fiber slows carbohydrate absorption |
| Kidney beans |
29 |
Supports post-meal glucose control |
| Black beans |
30 |
Improves gut microbiome |
| Lentils |
32 |
Supports GLP-1 hormone response |
4.2 Nuts and Seeds
| Chia seeds |
1 |
Improves satiety & gut hormone response |
| Flaxseed |
10 |
Supports digestive health |
| Almonds |
10 |
Slows carbohydrate absorption |
| Pumpkin seeds |
10 |
Magnesium supports insulin function |
| Walnuts |
15 |
Omega-3 supports metabolic health |
| Sunflower seeds |
20 |
Vitamin E antioxidant support |
| Cashews |
25 |
Moderate carbohydrate nut |
4.3 Polyphenol-Rich Foods
| Green tea |
0 |
Supports incretin hormone activity |
| Black tea |
0 |
Antioxidant support |
| Dark chocolate (β₯70% cocoa) |
25 |
Polyphenols improve insulin signaling |
| Blackberries |
25 |
High fiber & antioxidant |
| Raspberries |
32 |
Supports gut microbiome |
| Strawberries |
41 |
Vitamin C & polyphenols |
| Blueberries |
53 |
Polyphenol rich, moderate GI |
4.4 Olive Oil & Avocados
| Olive oil |
0 |
Supports GLP-1 hormone activity |
| Hemp seeds |
5 |
Omega fatty acids support metabolism |
| Almonds |
10 |
Monounsaturated fat supports satiety |
| Macadamia nuts |
10 |
Improves insulin sensitivity |
| Avocado |
15 |
Fiber + healthy fat improves gut hormones |
| Sesame seeds |
35 |
Mineral rich healthy fat |
β
Summary Table
| Low-carb/low-glycemic |
Cauliflower rice (10), zucchini noodles (15), legumes 28β32 |
Low |
Broccoli, cabbage, eggplant, spinach |
| Nuts & seeds |
Walnuts (15), flaxseed (10), chia (1) |
Very Low |
Almonds, pumpkin seeds, sunflower seeds, cashews |
| Polyphenol-rich |
Blueberries (53), green tea (0), dark chocolate β₯70% (25) |
LowβModerate |
Strawberries, raspberries, blackberries, black tea |
| Healthy fats (mono-unsat) |
Olive oil (0), avocado (15) |
Very Low |
Almonds, macadamia nuts, sesame seeds, hemp seeds |
Appendix II: Foods for Four Diabetic Subtypes β Grouped by Category
Legend: β
= recommended for that subtype.
GI values are approximate (whole foods; plain/unsweetened preparations).
Proteins (Animal & Dairy)
| Chicken breast |
0 |
β
|
|
|
|
| Cottage cheese (unsweetened, low-fat) |
0 |
β
|
|
|
|
| Eggs |
0 |
β
|
|
|
|
| Greek yogurt (unsweetened) |
0 |
β
|
|
|
|
| Mackerel |
0 |
|
β
|
|
|
| Salmon |
0 |
β
|
β
|
|
|
| Sardines |
0 |
|
β
|
|
|
| Tempeh |
0 |
β
|
|
|
|
| Tofu |
0 |
β
|
|
|
|
| Trout |
0 |
|
β
|
|
|
| Tuna (fresh) |
0 |
|
β
|
|
|
| Turkey breast |
0 |
β
|
|
|
|
Legumes & Pulses
| Black beans |
30 |
β
|
β
|
β
|
β
|
| Chickpeas |
28 |
β
|
β
|
β
|
β
|
| Edamame |
15 |
β
|
|
|
|
| Kidney beans |
29 |
β
|
β
|
β
|
β
|
| Lentils |
32 |
β
|
β
|
β
|
β
|
Grains, Pasta & Starches (Low-GI Emphasis)
| Barley |
28 |
β
|
β
|
|
|
| Brown rice |
50 |
β
|
|
|
|
| Oats (steel-cut) |
42 |
β
|
β
|
|
|
| Quinoa |
53 |
β
|
β
|
|
|
| Sweet potato (boiled) |
44 |
β
|
|
|
|
| Whole-wheat pasta (al dente) |
40β45 |
β
|
|
|
|
Leafy Greens & Cruciferous Veg
| Arugula |
15 |
β
|
β
|
|
|
| Broccoli |
10 |
β
|
β
|
β
|
β
|
| Brussels sprouts |
15 |
|
β
|
|
|
| Cabbage |
10 |
|
β
|
β
|
β
|
| Cauliflower |
10 |
β
|
β
|
β
|
β
|
| Kale |
15 |
β
|
β
|
|
|
| Spinach |
15 |
β
|
β
|
β
|
β
|
Other Non-Starchy Veg & Low-Carb Swaps
| Cauliflower rice |
10 |
|
|
β
|
β
|
| Eggplant |
15 |
|
|
β
|
β
|
| Zucchini noodles |
15 |
|
|
β
|
β
|
Fruits (Low to Moderate GI)
| Apple |
36 |
β
|
|
|
|
| Blackberries |
25 |
β
|
|
β
|
β
|
| Blueberries |
53 |
β
|
|
β
|
β
|
| Cherries |
22 |
β
|
|
|
|
| Grapefruit |
25 |
β
|
|
|
|
| Kiwi |
50 |
β
|
|
|
|
| Orange |
43 |
β
|
|
|
|
| Peaches |
42 |
β
|
|
|
|
| Pears |
38 |
β
|
|
|
|
| Plums |
24 |
β
|
|
|
|
| Pomegranate |
35 |
β
|
|
|
|
| Raspberries |
32 |
β
|
|
β
|
β
|
| Strawberries |
41 |
β
|
|
β
|
β
|
Nuts & Seeds
| Almonds |
10 |
β
|
|
β
|
β
|
| Brazil nuts |
10 |
β
|
|
|
|
| Cashews |
25 |
β
|
|
β
|
β
|
| Chia seeds |
1 |
|
β
|
β
|
β
|
| Flaxseeds |
10 |
β
|
β
|
β
|
β
|
| Hemp seeds |
5 |
|
|
β
|
β
|
| Macadamia nuts |
10 |
|
|
β
|
β
|
| Pumpkin seeds |
10 |
β
|
|
β
|
β
|
| Sesame seeds |
35 |
|
|
β
|
β
|
| Sunflower seeds |
20 |
β
|
|
β
|
β
|
| Walnuts |
15 |
β
|
|
β
|
β
|
Beverages (Unsweetened)
| Black tea |
0 |
|
β
|
β
|
β
|
| Coffee (black) |
0 |
|
β
|
|
|
| Green tea / Matcha |
0 |
|
β
|
β
|
β
|
| Herbal teas (e.g., chamomile, peppermint) |
0 |
|
β
|
|
|
| Yerba mate |
0 |
|
β
|
|
|
Oils & Healthy Fats
| Avocado |
15 |
β
|
|
β
|
β
|
| Olive oil |
0 |
|
|
β
|
β
|
Other
| Dark chocolate (β₯70% cocoa) |
25 |
|
|
β
|
β
|
Notes
- Muscle IR: emphasize lean proteins, low-GI carbs, magnesium-rich foods, and antioxidant-rich fruits.
- Hepatic IR: emphasize omega-3 fish, unsweetened coffee/green tea, leafy & cruciferous veg, and soluble-fiber foods (oats, barley, legumes, flax/chia).
- Ξ²-Cell Dysfunction: emphasize low-carb/low-GI choices, nuts/seeds, polyphenol-rich foods, olive oil & avocado.
- Impaired Incretin Action: similar to Ξ²-cell focusβlow-carb/low-GI, nuts/seeds, polyphenols, healthy fats.
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