Mulberries have moderate carbohydrate content with possible additional blood sugar benefits. One cup contains 14 g carbohydrate with 2 g fiber (net 12 g) and 60 calories. Glycemic index around 50 — moderate. Mulberries provide vitamin C (50% DV per cup), iron (14% DV), vitamin K (10%), and notable anthocyanin antioxidants (in red and black varieties). Some research suggests mulberry leaf extract and dried mulberry contain DNJ (1-deoxynojirimycin) — an alpha-glucosidase inhibitor that may modestly reduce post-meal blood sugar (5-10% reduction in studies). Limited commercial availability — fresh mulberries rare in stores; available frozen or dried at specialty/health food stores; growing your own is common. Three main varieties: white mulberry (Morus alba — China native, pale white-pink, mild sweet flavor, less anthocyanins, traditional silk production tree, dried white mulberries common in health food stores), red mulberry (Morus rubra — North American native, darker red, more flavor than white), black mulberry (Morus nigra — Middle Eastern origin, deep purple-black, most intense flavor like blackberry x raspberry, most anthocyanins, stains everything). White mulberry leaves have most DNJ for diabetes; black mulberry fruit has most antioxidants. Mulberry leaf tea — DNJ is alpha-glucosidase inhibitor similar mechanism to acarbose; inhibits enzymes breaking down complex carbs; slows glucose absorption; modest reduction in post-meal blood sugar; modest A1C reduction with regular use (preliminary); GI side effects similar to acarbose; quality variable. Discuss with healthcare provider; possible interactions with diabetes medications; not substitute for medication. Diabetes-friendly applications: fresh mulberries (½ cup with protein), frozen in smoothies, dried mulberries (concentrated — ¼ cup max), parfait with yogurt, added to oatmeal (small portion), in trail mix (limit), topping for salads (small amount), mulberry leaf tea (unsweetened), homemade mulberry sauce with stevia, mulberry-and-walnut salad with goat cheese, added to cottage cheese.
Mulberry Nutrition Profile
| Form | Calories | Carbs (g) | Fiber (g) |
|---|---|---|---|
| Fresh mulberries (1 cup, 140 g) | 60 | 14 | 2 |
| Dried mulberries (¼ cup, 40 g) | 140 | 32 | 5 |
| Mulberry juice (8 oz) | 130 | 30 | 0 |
| Mulberry-flavored snacks | varies | varies | varies |
| Mulberry leaf tea (8 oz) | 0-5 | 0-1 | 0 |
Mulberry Varieties
| Variety | Color | Origin | Notes |
|---|---|---|---|
| White mulberry (Morus alba) | White to pale pink | China | Less staining; silk worm food; DNJ-rich leaves |
| Red mulberry (Morus rubra) | Red | North America native | Moderate flavor |
| Black mulberry (Morus nigra) | Deep purple-black | Middle East/SW Asia | Most intense flavor; most antioxidants |
| Pakistani mulberry | Long dark; very sweet | Cultivated variety | Up to 4 inches long |
DNJ and Mulberry Leaf Research
- DNJ (1-deoxynojirimycin) is alpha-glucosidase inhibitor.
- Similar mechanism to acarbose (Precose) — prescription diabetes medication.
- Slows breakdown of complex carbs in small intestine.
- Reduces post-meal glucose absorption.
- Studies show modest 5-10% reduction in post-meal glucose.
- Modest A1C reduction with regular use (preliminary research).
- Forms: dried mulberry leaf tea, capsule supplements.
- Side effects: GI symptoms (gas, bloating, soft stools) — similar to acarbose.
- Not a substitute for diabetes medication.
- Discuss with healthcare provider before regular use.
- Possible interactions with other diabetes medications (hypoglycemia risk).
- Quality and dose standardization variable across products.
Diabetes-Friendly Applications
- Fresh mulberries (½ cup) with protein when available.
- Frozen mulberries in smoothies (½ cup with protein powder).
- Dried mulberries (¼ cup max — concentrated) on salads or in trail mix.
- Mulberry-and-yogurt parfait with cinnamon.
- Added to oatmeal (small portion overall).
- Topping for plain Greek yogurt or cottage cheese.
- Mulberry leaf tea (unsweetened or with stevia).
- Salad with mulberries, walnuts, goat cheese, vinaigrette.
- Homemade mulberry sauce with stevia for sugar-free condiment.
- Mulberry-and-walnut snack bar (homemade, sugar-free).
- Chia seed pudding with mulberries.
- Smoothie bowl topped with mulberries.
Where to Find Mulberries
- Fresh mulberries: very rare in supermarkets (extremely perishable).
- Backyard tree — common in many parts of U.S.
- Foraging — wild mulberry trees common but identify carefully.
- Frozen: health food stores, online; less common than berries.
- Dried: health food stores; widely available.
- Dried white mulberries — common at Trader Joe’s, Whole Foods, Asian markets.
- Mulberry leaf tea: health food stores, online, Asian markets.
- Mulberry leaf supplements: various brands online.
- Cost: dried mulberries $5-15 per pound; tea $5-15 per box.
The Bottom Line
Mulberries have moderate carbohydrate content with possible additional blood sugar benefits. One cup contains 14 g carbohydrate with 2 g fiber (net 12 g) and 60 calories. Glycemic index around 50 — moderate. Mulberries provide vitamin C (50% DV per cup), iron (14% DV), vitamin K (10%), and notable anthocyanin antioxidants (in red and black varieties). Some research suggests mulberry leaf extract and dried mulberry contain DNJ (1-deoxynojirimycin) — an alpha-glucosidase inhibitor similar to acarbose that may modestly reduce post-meal blood sugar (5-10% reduction). Three main varieties: white mulberry (Morus alba — China, pale white-pink, mild, silk production tree, DNJ-rich leaves), red mulberry (Morus rubra — North American native, darker red), black mulberry (Morus nigra — Middle Eastern origin, deep purple-black, most intense flavor, most antioxidants). White mulberry leaves have most DNJ for diabetes; black mulberry fruit has most antioxidants. Mulberry leaf tea contains DNJ (alpha-glucosidase inhibitor) — similar mechanism to acarbose; slows breakdown of complex carbs; reduces post-meal glucose absorption; modest A1C reduction with regular use; GI side effects (gas, bloating); discuss with healthcare provider before regular use; possible drug interactions; not substitute for medication. Diabetes-friendly applications: fresh mulberries with protein when available, frozen in smoothies, dried mulberries (¼ cup max — concentrated) on salads or in trail mix, parfait with yogurt and cinnamon, added to oatmeal (small portion), topping for plain Greek yogurt or cottage cheese, mulberry leaf tea (unsweetened), salad with walnuts and goat cheese, homemade mulberry sauce with stevia, mulberry-and-walnut snack bar (homemade, sugar-free), chia seed pudding with mulberries. Where to find: fresh rare in supermarkets (perishable); backyard tree common in U.S.; foraging (identify carefully); frozen at health food stores; dried widely available (Trader Joe’s, Whole Foods, Asian markets); mulberry leaf tea at health food stores and Asian markets; supplements online. Cost: dried $5-15 per pound; tea $5-15 per box. For adults with type 2 diabetes interested in functional foods with possible blood sugar benefits, mulberry products (especially leaf tea or dried white mulberries) offer modest evidence-supported effects — but not substitute for diabetes management. Discuss with healthcare provider. See our broader diabetes diet guide for context.
