According to Gram Research analysis, a 2026 randomized controlled trial of 97 adults found that whole fruit feijoa powder enhanced blood pressure improvements achieved through weight loss, with systolic blood pressure significantly lower in the feijoa group by months 4 and 6. However, the powder did not improve blood sugar control or weight loss beyond what the diet alone achieved, suggesting its benefits are specific to cardiovascular health rather than diabetes prevention directly.
A new study tested whether a powder made from whole feijoa fruit could help prevent type 2 diabetes in people trying to lose weight. Researchers gave 97 people either feijoa powder or a placebo while they followed a weight-loss diet for 6 months. While both groups lost weight and improved their blood sugar levels, the feijoa powder group showed better improvements in blood pressure, especially in the later months. The findings suggest that feijoa’s natural compounds might provide extra heart health benefits when combined with weight loss efforts.
Key Statistics
A 2026 randomized controlled trial of 97 adults with prediabetes found that 1150 mg daily of whole fruit feijoa powder enhanced systolic blood pressure reductions compared to placebo, with significant improvements visible by month 4 and month 6 of treatment.
In the FERDINAND study of 97 participants, both the feijoa powder group and placebo group lost weight during a 2-month low-energy diet, but only the feijoa group showed significantly better blood pressure improvements during the subsequent 4-month maintenance phase.
Gram Research analysis of this 2026 trial found that feijoa powder’s polyphenol content, particularly catechins, may support vascular health, as evidenced by superior systolic blood pressure outcomes compared to placebo in adults with obesity and prediabetes.
The Quick Take
- What they studied: Whether eating feijoa powder daily could improve blood sugar control and other diabetes risk factors in people following a weight-loss diet.
- Who participated: 97 adults who were overweight or obese and had prediabetes (higher-than-normal blood sugar but not yet diabetic). They were split into two groups: one received 1150 mg of feijoa powder daily, and the other received a placebo (fake powder).
- Key finding: Both groups improved their blood sugar and lost weight during the diet. However, the feijoa powder group had better blood pressure improvements by months 4 and 6 compared to the placebo group.
- What it means for you: If you’re trying to prevent type 2 diabetes through weight loss, adding feijoa powder might provide extra benefits for heart health. However, this is one study, so more research is needed before making it a standard recommendation. Talk to your doctor before adding supplements to your routine.
The Research Details
This was a randomized controlled trial, which is one of the strongest types of scientific studies. Researchers randomly assigned 97 people to two groups: one received feijoa powder (a ground-up whole fruit supplement containing 1150 mg daily) and the other received a placebo (a fake powder that looked identical). Neither the participants nor the researchers knew who got the real powder until the study ended, which helps prevent bias.
The study lasted 6 months total. For the first 2 months, everyone followed a low-energy diet designed to help them lose weight. For the remaining 4 months, participants received advice on how to maintain their weight loss through healthy eating. Researchers measured weight, fasting blood sugar, blood pressure, and other health markers at the start and at months 2, 4, and 6.
The feijoa fruit used in the powder is rich in polyphenols and abscisic acid, natural plant compounds that previous research suggests might help with blood sugar control and heart health. The researchers wanted to see if these compounds could boost the benefits of weight loss alone.
This study design is important because it tests whether feijoa powder provides real benefits beyond what weight loss alone can achieve. By using a placebo group, researchers could separate the effects of the powder from the effects of the diet and lifestyle changes. The 6-month timeframe is long enough to see meaningful changes in blood sugar and blood pressure, which are key risk factors for type 2 diabetes and heart disease.
This study has several strengths: it was randomized (reducing bias), it included a placebo control group, it tracked participants for 6 months, and it used proper statistical methods to analyze the data. The study was published in a peer-reviewed journal (Diabetes, Obesity & Metabolism), meaning other experts reviewed it before publication. However, the sample size of 97 people is relatively modest, so results should be confirmed in larger studies. The study was conducted in one location, so results may not apply equally to all populations.
What the Results Show
Both the feijoa powder group and the placebo group experienced significant weight loss during the first 2 months of the low-energy diet. After that, both groups gradually regained some weight over the next 4 months, but the pattern was similar between groups, meaning the feijoa powder didn’t prevent weight regain better than placebo.
Fasting blood sugar (the amount of glucose in your blood after not eating) followed the same pattern as weight loss in both groups. It improved during the weight-loss phase and then gradually increased again during the weight-maintenance phase. There was no significant difference between the feijoa powder group and the placebo group in blood sugar improvements.
The most notable finding involved blood pressure. Systolic blood pressure (the top number) decreased in both groups over the 6 months, but the feijoa powder group showed significantly better improvements than the placebo group at months 4 and 6. This suggests that the feijoa powder may have provided extra cardiovascular benefits. Diastolic blood pressure (the bottom number) showed similar improvements in both groups with no significant difference.
The researchers believe the polyphenols in feijoa, particularly compounds called catechins, may have contributed to these blood pressure improvements by supporting blood vessel health.
While blood pressure was the standout finding, the study also measured other metabolic markers. The improvements in weight loss and blood sugar control were comparable between groups, indicating that the feijoa powder didn’t enhance these outcomes beyond what the diet alone achieved. The safety profile was good, with no serious adverse events reported in either group.
Previous research has shown that low-energy diets are effective for weight loss and improving diabetes risk factors. This study confirms those findings. The novel contribution is the suggestion that whole fruit feijoa powder may provide additional cardiovascular benefits. Earlier studies on feijoa’s polyphenols showed promise in laboratory and animal studies, but this is one of the first human trials testing the whole fruit powder in a diabetes prevention context. The blood pressure findings align with other research showing that polyphenol-rich foods can support heart health.
The study had several limitations worth noting. First, the sample size of 97 people is relatively small, so results may not apply to larger, more diverse populations. Second, the study lasted only 6 months, so we don’t know if benefits persist longer. Third, participants were predominantly overweight or obese with prediabetes, so results may not apply to people without these conditions. Fourth, the feijoa powder dose (1150 mg daily) was specific to this study, we don’t know if different doses would work better or worse. Finally, the study didn’t measure actual diabetes development, only risk markers like blood sugar and blood pressure.
The Bottom Line
Based on this research, feijoa powder may be worth considering as a complementary approach to weight loss for blood pressure management, particularly if you have prediabetes or are at risk for type 2 diabetes. However, confidence in this recommendation is moderate because it’s based on one study with a modest sample size. The primary approach should remain weight loss through diet and exercise, as that’s where the strongest evidence lies. Always consult your doctor before starting any supplement, especially if you take blood pressure medications.
This research is most relevant to adults who are overweight or obese and have prediabetes or elevated blood sugar. It may also interest people with high blood pressure who are trying to lose weight. People with normal weight and normal blood sugar may not see the same benefits. Pregnant women, people with certain medical conditions, and those taking specific medications should consult their doctor before using feijoa supplements.
In this study, blood pressure improvements became noticeable by month 4 and were clearer by month 6. Weight loss occurred quickly during the first 2 months of dieting. If you were to try feijoa powder, you should expect to see meaningful changes over 4-6 months, not days or weeks. Remember that the diet itself was the primary driver of improvements, the feijoa powder appeared to enhance specific benefits rather than create dramatic changes on its own.
Frequently Asked Questions
Does feijoa powder help prevent type 2 diabetes?
A 2026 trial found that feijoa powder didn’t improve blood sugar control beyond what weight loss alone achieved. However, it did enhance blood pressure improvements, which is a diabetes risk factor. More research is needed to determine if this translates to actual diabetes prevention.
How much feijoa powder should I take daily for diabetes prevention?
The study used 1150 mg daily for 6 months. This is the only human dose tested for diabetes prevention. Always consult your doctor before starting supplements, as the right dose for you may differ based on your health status and medications.
Can feijoa powder replace my diabetes medication?
No. Feijoa powder should never replace prescribed diabetes or blood pressure medications. It may work alongside medical treatment and lifestyle changes, but only under your doctor’s supervision. Never stop or reduce medications without medical guidance.
How long does it take to see benefits from feijoa powder?
In the study, blood pressure improvements became noticeable by month 4 and were clearer by month 6. Don’t expect immediate results. Benefits appear to develop gradually over several months when combined with weight loss efforts.
Is feijoa powder safe for everyone?
The study reported no serious adverse events, suggesting good safety. However, pregnant women, people with certain medical conditions, and those on specific medications should consult their doctor first. Feijoa powder is not appropriate for everyone.
Want to Apply This Research?
- Track systolic blood pressure weekly (the top number in a blood pressure reading). Record it in your app along with your feijoa powder intake to see if there’s a correlation. Also track weight weekly and fasting blood sugar if you have a home glucose monitor.
- If using an app to support diabetes prevention, set a daily reminder to take feijoa powder at the same time each day. Log it when you take it, similar to how you’d log a medication. Pair this with logging your meals to track your low-energy diet progress and weight loss.
- Over 6 months, monitor three key metrics: weight (weekly), blood pressure (weekly), and blood sugar if possible (monthly or as recommended by your doctor). Create a dashboard view showing trends over time. Share monthly summaries with your healthcare provider to ensure the supplement is working for you and not interfering with any medications.
This article summarizes research findings and should not be considered medical advice. Feijoa powder is not approved by the FDA as a diabetes treatment. If you have prediabetes, type 2 diabetes, high blood pressure, or are taking medications, consult your healthcare provider before starting any supplement, including feijoa powder. Do not use feijoa powder as a replacement for prescribed medications or medical treatment. Results from this single study may not apply to all individuals. Always discuss supplement use with your doctor, especially regarding potential interactions with medications.
This research translation is published by Gram Research, the science division of Gram, an AI-powered nutrition tracking app.
