Neither dates nor prunes are universally “better” for you. They’re both nutrient-dense dried fruits with real health benefits, but each one shines in different areas. Prunes have a clear edge for bone health and digestive regularity, while dates offer unique advantages during pregnancy and provide a broader mineral profile. The best choice depends on what your body needs right now.
Nutritional Profile at a Glance
A standard serving of dates (about four Medjool dates, or 100 grams) delivers 23% of your daily potassium, 40% of your copper, 15% of your magnesium, and 17% of your vitamin B6. That same serving packs roughly 7 grams of fiber and 3.6 grams of protein. Dates are calorie-dense, though, with about 277 calories per 100 grams, most of it from natural sugars.
Prunes (dried plums) are lower in calories per serving, typically around 240 calories per 100 grams. They’re rich in potassium, boron, copper, and vitamin K. Where prunes really stand out is their phenolic compound content: they contain more total polyphenols than fresh plums, including chlorogenic acids and flavonoids that function as antioxidants. Both fruits are high in fiber, but prunes contain more sorbitol, which is partly why they’re so effective for digestion.
Prunes Are Stronger for Bone Health
This is one area where prunes have no real competition from dates. A 12-month randomized controlled trial studied 235 postmenopausal women and found that eating about 50 grams of prunes daily (roughly five or six prunes) preserved hip bone mineral density over the full year. The control group, which ate no prunes, lost 1.1% of their hip bone density over 12 months. The prune group lost only 0.3%, a statistically significant difference. Hip fracture risk scores worsened in the control group but stayed stable in the women eating prunes.
The combination of vitamin K, boron, and polyphenols in prunes appears to work together to slow bone breakdown. Clinical research has shown that consuming 50 grams of prunes daily significantly lowered blood levels of two inflammatory markers linked to bone loss. Prune consumption also increased total antioxidant capacity and antioxidant enzyme activity in the blood. For anyone concerned about osteoporosis, particularly postmenopausal women, prunes offer a well-studied, nonpharmacologic way to protect bone density.
Dates Have a Unique Role in Pregnancy
Dates have been studied specifically for their effect on labor, and the results are striking. In a clinical trial of 182 first-time mothers, women who ate 70 to 76 grams of dates daily starting at 37 weeks of pregnancy arrived at the hospital significantly more dilated (about 4 cm on average) compared to the control group (about 2.5 cm). The date group also had dramatically higher rates of spontaneous labor onset: 94.5% versus 41.3% in the non-date group.
Perhaps most notably, only 5.5% of the date-eating group needed synthetic oxytocin to speed up labor, compared to 48.7% of the control group. The second and third stages of labor were also significantly shorter. Researchers believe compounds in dates may mimic or support the effects of oxytocin on the uterus, helping it contract more effectively. No comparable research exists for prunes in this context.
Blood Sugar Impact
If you’re watching your blood sugar, this comparison matters. Dates vary widely in their glycemic index depending on the variety. Medjool dates have a GI of about 55, which places them right at the border between low and medium. Some varieties score much lower: Sukkary dates come in at 43 and Shaqra at 42.8, both solidly in the low-GI range. Others, like Sellaj dates (GI of 74.6), spike blood sugar more significantly.
Prunes generally have a lower glycemic index than most date varieties, typically falling in the low-to-mid 40s. They also contain less total sugar per serving. If blood sugar management is a priority, prunes are the safer default choice, though choosing a low-GI date variety like Sukkary or Ajwah (GI of 55.9, glycemic load of just 8.5) can narrow that gap considerably.
Digestive Benefits
Both fruits are high in fiber, but prunes are the more effective choice for constipation relief. The combination of fiber, sorbitol (a natural sugar alcohol that draws water into the intestines), and phenolic compounds gives prunes a well-established laxative effect. This is why prune juice has been a go-to remedy for decades.
Dates provide substantial fiber (about 7 grams per serving) and can support overall digestive health, but they lack the sorbitol content that makes prunes particularly effective for regularity. If constipation is your main concern, prunes are the clear winner.
Antioxidant and Anti-Inflammatory Effects
Prunes have been more thoroughly studied for their antioxidant and anti-inflammatory properties. Their high concentration of chlorogenic acids, phenolic acids, and flavonoids translates into measurable effects in the body. In clinical studies, women consuming 50 grams of prunes daily showed increased total antioxidant capacity in their blood. That same dose significantly decreased levels of two key inflammatory proteins.
Dates contain their own antioxidant compounds, including flavonoids and carotenoids, but the research base for their anti-inflammatory effects in humans is thinner. Both fruits contribute antioxidants to your diet, but prunes have more clinical evidence backing their impact.
How Much to Eat Daily
For prunes, 50 grams per day (about five to six prunes) is the dose that produced bone-protective and anti-inflammatory effects in clinical trials. That amount was also well tolerated over a full year, with high compliance rates. Going higher, to 100 grams daily, didn’t actually produce better bone outcomes and is harder to stick with long-term.
For dates, a standard serving is about four dates (roughly 100 grams for Medjool dates), which delivers a strong mineral and fiber boost. During late pregnancy, the studied dose was 70 to 76 grams daily starting at 37 weeks. Both fruits are calorie-dense and sugar-rich, so treating them as a nutrient-packed snack rather than an all-day food makes sense. Swapping them in for processed sweets or candy is one of the easiest ways to get their benefits without adding extra calories to your day.
Which One Should You Choose?
If you’re a postmenopausal woman concerned about bone density, prunes have the strongest evidence in your favor. If you’re in your third trimester of pregnancy, dates are worth adding to your routine. For everyday digestive support and constipation relief, prunes are more effective. For a broader mineral boost with high potassium, magnesium, and copper, dates deliver more per serving.
There’s no rule against eating both. They serve different nutritional roles, and rotating between them gives you the widest range of benefits. If you’re choosing just one to keep in your pantry, pick the one that matches your most pressing health goal.