According to Gram Research analysis, pumpkin seeds and pumpkin seed oil may help lower triglycerides (blood fat) in people with high cholesterol. A 2026 randomized controlled trial of 89 overweight adults found that those eating pumpkin seeds or pumpkin seed oil for 4 weeks experienced triglyceride decreases, though the improvement wasn’t significantly better than a control group following a low-cholesterol diet alone. This suggests pumpkin products are nutritious additions to a heart-healthy diet, but diet changes themselves appear to be the primary driver of health improvements.
Researchers tested whether eating pumpkin seeds or pumpkin seed oil could help people with high cholesterol and excess weight. In a 4-week study of 89 adults, those who ate pumpkin seeds or pumpkin seed oil while following a low-cholesterol diet saw their triglycerides (a type of blood fat) decrease more than the control group. However, the difference between the pumpkin groups and the control group wasn’t large enough to be certain the seeds alone made the difference. All groups improved on the diet, suggesting that healthy eating was the main factor in the results.
Key Statistics
A 2026 randomized controlled trial of 89 overweight adults with high cholesterol found that triglycerides decreased in both the pumpkin seed group and pumpkin seed oil group after 4 weeks, though improvements were not significantly better than the control group following a low-cholesterol diet alone.
In a 4-week study published in 2026, all three groups (pumpkin seeds, pumpkin seed oil, and control) showed significant decreases in total cholesterol and LDL cholesterol, with 89 participants completing the intervention.
Research from 2026 showed that 30 grams daily of pumpkin seeds or 15 grams daily of pumpkin seed oil, combined with a low-cholesterol diet containing less than 100 mg cholesterol per day, produced triglyceride improvements in 89 overweight adults over 4 weeks.
The Quick Take
- What they studied: Whether adding pumpkin seeds or pumpkin seed oil to a healthy diet helps lower blood fat levels in people with high cholesterol
- Who participated: 89 overweight adults with high cholesterol levels who completed a 4-week study. They were split into three groups: one eating pumpkin seeds, one eating pumpkin seed oil, and one control group with no pumpkin products
- Key finding: People eating pumpkin seeds or pumpkin seed oil saw their triglycerides (blood fat) drop during the study, but the improvement wasn’t significantly better than the control group that just followed the diet alone
- What it means for you: Pumpkin seeds are nutritious and may support heart health as part of a balanced diet, but the evidence doesn’t yet prove they’re better than diet changes alone for lowering blood fats. They’re worth including in a healthy eating plan, but shouldn’t replace other proven treatments
The Research Details
This was a randomized controlled trial, which is one of the strongest types of research studies. Researchers randomly divided 107 adults with high cholesterol into three equal groups. One group ate 30 grams of pumpkin seeds daily (about a small handful), another group consumed 15 grams of pumpkin seed oil daily (about one tablespoon), and a third group served as the control with no pumpkin products. All three groups followed the same low-cholesterol diet plan for 4 weeks, eating less than 100 milligrams of cholesterol per day. The researchers measured blood cholesterol, triglycerides, blood sugar, and other health markers before and after the 4-week period. By the end, 89 participants completed the study and were included in the analysis.
Randomized controlled trials are considered the gold standard in nutrition research because randomly assigning people to groups helps eliminate bias. By having all groups follow the same diet, researchers could see whether pumpkin products provided extra benefits beyond what the diet alone achieved. This design helps separate the effects of the pumpkin from the effects of eating healthier overall.
This study has several strengths: it was randomized, had a control group for comparison, and measured multiple health markers. However, the study was short (only 4 weeks), which may not be long enough to see lasting effects. The sample size of 89 participants is moderate, meaning results should be interpreted cautiously. The study was also relatively small, so larger studies would help confirm these findings. Additionally, we don’t know if benefits would continue beyond 4 weeks or if they would be sustained over months or years
What the Results Show
All three groups showed improvements in total cholesterol and LDL cholesterol (the bad cholesterol) after 4 weeks, which makes sense because everyone followed a low-cholesterol diet. The key finding was that triglycerides (another type of blood fat) decreased in both the pumpkin seed group and the pumpkin seed oil group, but not in the control group. This suggests pumpkin products may help lower triglycerides. However, when researchers compared the three groups directly, the differences weren’t statistically significant, meaning the improvements could have happened by chance. All groups also showed improvements in body measurements like waist circumference and weight, with no major differences between groups. This indicates that the low-cholesterol diet itself was the primary driver of health improvements, regardless of whether people ate pumpkin products.
Liver enzymes (ALT and AST) decreased in all groups, suggesting the diet was beneficial for liver health. Blood sugar levels were measured but not highlighted as a major finding. No serious side effects or safety concerns were reported in any group during the 4-week study period. The fact that all groups improved suggests that following a structured, low-cholesterol diet is powerful medicine on its own
Previous research has shown that pumpkin seeds contain compounds like magnesium, zinc, and antioxidants that theoretically could support heart health. This study is one of the first to test pumpkin seeds in a controlled way in humans with high cholesterol. The results align with the idea that pumpkin seeds are nutritious, but they don’t show that pumpkin seeds are dramatically better than diet changes alone. This fits with a broader pattern in nutrition research: whole foods are healthy, but no single food is a magic cure
The study lasted only 4 weeks, which is quite short for measuring lasting health changes. Some people dropped out before finishing (18 of 107 started but only 89 completed), which could affect results. The study didn’t track whether people continued eating pumpkin products after the study ended or if benefits lasted longer. The study also didn’t measure other important heart health markers like inflammation or blood vessel function. Additionally, the study included only overweight adults with high cholesterol, so results may not apply to other populations. Finally, researchers couldn’t determine whether pumpkin products provided real benefits beyond the diet alone, since the between-group differences weren’t statistically significant
The Bottom Line
Include pumpkin seeds as part of a heart-healthy diet if you enjoy them, but don’t rely on them as a primary treatment for high cholesterol. A low-cholesterol diet with plenty of vegetables, whole grains, and lean proteins remains the proven foundation. If you have high cholesterol or triglycerides, work with your doctor on a complete treatment plan that may include diet, exercise, and medication if needed. Confidence level: moderate for pumpkin seeds as a supportive food, low for pumpkin seeds as a standalone treatment
This research is relevant to adults with high cholesterol or high triglycerides who are looking for dietary ways to improve their heart health. It’s also interesting for people who enjoy pumpkin seeds and want to understand their health benefits. However, people taking cholesterol medications should not stop or reduce their medications based on this study. People with nut or seed allergies should avoid pumpkin products. If you have liver disease or other serious health conditions, consult your doctor before making major dietary changes
In this study, changes in blood fats appeared within 4 weeks, which is relatively quick. However, lasting improvements in heart health typically take months to years of consistent healthy eating and exercise. Don’t expect pumpkin seeds alone to fix high cholesterol overnight. Think of them as one helpful piece of a larger healthy lifestyle puzzle
Frequently Asked Questions
Do pumpkin seeds lower triglycerides and cholesterol?
Pumpkin seeds may help lower triglycerides when eaten as part of a low-cholesterol diet, according to a 2026 trial of 89 adults. However, the improvement wasn’t significantly better than diet changes alone, suggesting the diet itself was the main factor in health improvements.
How much pumpkin seed should I eat daily for heart health?
The study used 30 grams (about one small handful) of pumpkin seeds daily. This amount is reasonable to include in a balanced diet, but pumpkin seeds shouldn’t replace proven treatments like medication or exercise for high cholesterol.
Is pumpkin seed oil better than whole pumpkin seeds?
The 2026 study tested both pumpkin seeds and pumpkin seed oil, and both showed similar triglyceride improvements. Whole seeds provide fiber and other nutrients, while oil is more concentrated. Both can be part of a healthy diet, but neither is dramatically superior to the other.
How long does it take to see results from eating pumpkin seeds?
In the 4-week study, triglyceride changes appeared within that timeframe. However, lasting improvements in heart health typically require months of consistent healthy eating and exercise. Don’t expect immediate results from pumpkin seeds alone.
Can pumpkin seeds replace cholesterol medication?
No. This study shows pumpkin seeds may support heart health as part of a diet, but they are not a substitute for prescribed cholesterol medications. Always follow your doctor’s treatment plan and discuss any dietary changes with them first.
Want to Apply This Research?
- Log daily pumpkin seed or pumpkin seed oil intake (in grams) alongside weekly triglyceride or cholesterol measurements if you have access to blood work. Track this for at least 8 to 12 weeks to see if patterns emerge in your personal health data
- Add one small handful of pumpkin seeds (about 30 grams) to your daily routine: sprinkle on salads, mix into yogurt, add to smoothies, or eat as a snack. Pair this with other heart-healthy habits like reducing saturated fat, eating more vegetables, and exercising regularly
- Check your blood cholesterol and triglyceride levels every 3 to 6 months through your doctor. Use the app to track your diet quality overall, not just pumpkin seeds. Monitor how you feel, your energy levels, and any changes in weight or measurements. Remember that diet is just one factor; sleep, stress, and exercise matter too
This research summary is for educational purposes only and should not replace professional medical advice. The study was short-term (4 weeks) and relatively small, so results should be interpreted cautiously. If you have high cholesterol, high triglycerides, or any heart condition, consult your doctor before making significant dietary changes or stopping any medications. Pumpkin seeds are a nutritious food but are not a proven treatment for high cholesterol on their own. Always work with your healthcare provider to develop a complete treatment plan tailored to your individual health needs.
This research translation is published by Gram Research, the science division of Gram, an AI-powered nutrition tracking app.