A 2026 cohort study of 4,877 adults with type 2 diabetes or obesity found that those receiving personalized low-carbohydrate nutrition coaching through telemedicine had a 56% lower risk of heart attack, stroke, or death compared to standard care. According to Gram Research analysis, the telemedicine nutrition program group experienced only 4.1 major cardiovascular events per 1,000 person-years versus 9.3 in the control group, suggesting that individualized carbohydrate-reduced nutrition delivered remotely may provide significant heart protection.
A new study of nearly 10,000 people found that adults with type 2 diabetes or obesity who received personalized nutrition coaching through telemedicine and followed a carbohydrate-reduced diet had significantly fewer heart attacks, strokes, and other serious cardiovascular events compared to those receiving standard care. According to Gram Research analysis, participants in the telemedicine nutrition program experienced a 56% lower risk of major heart events and a 30% lower risk of developing new cardiovascular disease overall. While these results are promising, researchers emphasize that more rigorous clinical trials are needed to confirm whether the diet itself caused these improvements or if other factors played a role.
Key Statistics
A 2026 cohort study of 4,877 adults with type 2 diabetes or obesity found that those receiving telemedicine-based low-carbohydrate nutrition coaching had a 56% lower risk of heart attack, stroke, or death compared to standard care.
According to research reviewed by Gram, participants in the telemedicine nutrition program experienced 4.1 major cardiovascular events per 1,000 person-years compared to 9.3 in the control group, representing a statistically significant 56% risk reduction.
The same 2026 study of nearly 10,000 people found that the low-carb telemedicine nutrition program reduced the risk of developing any new cardiovascular disease by 30% and new-onset high blood pressure by 19%.
Among 4,877 matched pairs of adults with type 2 diabetes or obesity, those receiving individualized carbohydrate-reduced nutrition via telemedicine had a 48% lower risk of major adverse cardiovascular events when additional serious heart conditions were included in the analysis.
The Quick Take
- What they studied: Whether people with type 2 diabetes or obesity who follow a low-carbohydrate diet through telemedicine coaching experience fewer heart attacks, strokes, and other serious heart problems compared to people receiving regular medical care.
- Who participated: 9,754 adults (average age 51 years, 60% female) with type 2 diabetes or obesity but no prior heart disease. Half received personalized nutrition coaching focused on reducing carbohydrates through video visits, while the other half received standard care.
- Key finding: People in the telemedicine nutrition program had a 56% lower risk of heart attack, stroke, or death from any cause, and a 30% lower risk of developing any new cardiovascular disease compared to the control group.
- What it means for you: If you have type 2 diabetes or obesity, a low-carb diet delivered through telemedicine coaching may help reduce your risk of serious heart problems. However, this study cannot prove the diet caused the improvement, so talk with your doctor before making major dietary changes.
The Research Details
Researchers looked at insurance claims data from January 2016 through June 2025 for adults with type 2 diabetes or obesity. They compared two groups: one that received individualized nutrition therapy focused on reducing carbohydrates through telemedicine (video visits), and another group that received standard medical care. The groups were matched using statistical methods to make them as similar as possible at the start, so differences in outcomes would more likely be due to the nutrition program rather than other factors like age or existing health conditions.
The study tracked what happened to both groups over time, recording whether they experienced heart attacks, strokes, deaths, heart failure, procedures to open blocked arteries, and new cases of high blood pressure. Researchers calculated how often these events occurred in each group per 1,000 person-years, which is a way of comparing event rates fairly even if people were followed for different lengths of time.
This study design is important because it looks at real-world outcomes in actual patients rather than just measuring changes in blood sugar or cholesterol levels in a lab. By using insurance claims, researchers could track whether the nutrition program actually prevented serious health events like heart attacks and strokes. However, because this is an observational study rather than a randomized trial, it cannot definitively prove that the diet caused the improvements.
The study included a large number of participants (nearly 10,000 people) and used statistical matching to create comparable groups, which strengthens the findings. The researchers tracked multiple types of heart events and used standard medical definitions for these outcomes. However, the study relied on insurance claims data, which may not capture all health events, and people who chose to participate in the nutrition program may have been more motivated to improve their health than those in the control group, which could explain some of the differences.
What the Results Show
People receiving the telemedicine nutrition program had dramatically lower rates of serious heart events. For the most serious outcomes (heart attack, stroke, or death from any cause), the program group had only 4.1 events per 1,000 person-years compared to 9.3 in the control group, representing a 56% lower risk. When researchers included additional serious heart conditions like heart failure and procedures to open blocked arteries, the program group still had a 48% lower risk (5.7 vs. 10.8 events per 1,000 person-years).
The benefits extended to broader measures of heart health. The program group had a 30% lower risk of developing any new cardiovascular disease (27.7 vs. 36.9 events per 1,000 person-years). Even for high blood pressure, which is a risk factor rather than a major event, the program group had a 19% lower risk of developing new cases (41.8 vs. 49.3 events per 1,000 person-years).
All of these differences were statistically significant, meaning they were unlikely to have occurred by chance. The researchers used standard statistical tests to confirm that the nutrition program group truly had better outcomes than the control group.
The study found consistent benefits across different types of cardiovascular outcomes, suggesting the nutrition program’s protective effect was broad rather than limited to one type of heart problem. The fact that even high blood pressure development was reduced by 19% indicates the program may work through multiple pathways to improve heart health, not just by preventing major events.
Previous research has shown that low-carbohydrate diets improve individual risk factors like blood sugar control, weight loss, and blood pressure. This study extends that knowledge by showing these improvements may translate into fewer actual heart attacks and strokes. The magnitude of risk reduction (56% for major heart events) is larger than what many previous studies of individual risk factors would have predicted, suggesting the combined effect of multiple improvements may be particularly powerful.
This study cannot prove that the low-carbohydrate diet caused the lower heart event rates. People who chose to participate in the nutrition program may have been more health-conscious or motivated than those in the control group, which could explain some benefits. The study relied on insurance claims data, which may not capture all health events, particularly if people paid out-of-pocket for care. Additionally, the study included mostly people with type 2 diabetes or obesity, so results may not apply to other populations. Longer-term studies and randomized controlled trials are needed to confirm these findings.
The Bottom Line
If you have type 2 diabetes or obesity, discuss with your doctor whether a low-carbohydrate diet delivered through telemedicine coaching might be appropriate for you. This study suggests such an approach may reduce your risk of serious heart problems, but individual results vary. Your doctor can help determine if this approach fits your specific health situation and medications. Moderate confidence: The study shows strong associations, but cannot prove causation.
Adults with type 2 diabetes or obesity should find these results particularly relevant, as they represent the population studied. People with a family history of heart disease or those concerned about their cardiovascular risk may also benefit from discussing this approach with their healthcare provider. This study does not directly apply to people without diabetes or obesity, or those with existing heart disease, though the general principles may be worth discussing with a doctor.
The study tracked participants over several years, and benefits appeared throughout the follow-up period. You should not expect immediate results; cardiovascular benefits typically develop over months to years as the diet helps improve blood sugar control, weight, and blood pressure. Consistent adherence to the program is likely necessary to maintain these protective effects.
Frequently Asked Questions
Can a low-carb diet prevent heart attacks and strokes?
This study suggests it may help. Adults with diabetes or obesity who followed a low-carb diet through telemedicine coaching had 56% fewer heart attacks and strokes compared to standard care. However, this observational study cannot prove the diet caused the improvement, so talk with your doctor about whether it’s right for you.
How much does telemedicine nutrition coaching cost and is it covered by insurance?
This study used insurance claims data but did not report specific costs. Coverage varies by insurance plan and location. Contact your insurance provider or ask your doctor about available telemedicine nutrition programs and whether they’re covered under your plan.
How long does it take to see heart health improvements from a low-carb diet?
This study tracked participants over several years, and benefits appeared throughout the follow-up period. Individual risk factors like blood sugar and weight typically improve within weeks to months, but cardiovascular event reduction develops over longer periods as these improvements accumulate.
Is a low-carb diet safe for people with type 2 diabetes?
Many people with type 2 diabetes follow low-carb diets successfully, but individual needs vary. If you take diabetes medications, reducing carbohydrates may affect your blood sugar levels and medication requirements. Always work with your doctor or a registered dietitian before making significant dietary changes.
Can I get the same benefits from a low-carb diet without telemedicine coaching?
This study specifically examined telemedicine coaching combined with a low-carb diet, so it cannot answer whether diet alone provides the same benefits. Personalized coaching may help with adherence and adjustments, but discuss your options with your healthcare provider.
Want to Apply This Research?
- Log daily carbohydrate intake (in grams) and weekly average blood sugar readings if you have diabetes. Track weight weekly and blood pressure readings at least monthly to monitor the key factors this intervention targets.
- Use the app to schedule and attend weekly telemedicine nutrition coaching sessions, log meals before eating to identify high-carb choices, and set a specific carbohydrate target (discuss with your nutrition coach) to gradually reduce intake from your current baseline.
- Create a dashboard showing 90-day trends in carbohydrate intake, weight, blood sugar, and blood pressure. Set monthly check-in reminders to review progress with your nutrition coach and adjust the plan if needed. Track adherence to coaching sessions as a leading indicator of success.
This study suggests that low-carbohydrate nutrition delivered through telemedicine may reduce cardiovascular risk in adults with type 2 diabetes or obesity, but it cannot prove causation. Results are based on insurance claims data and may not capture all health events. Individual outcomes vary based on genetics, adherence, and other health factors. Before making significant dietary changes, especially if you take medications for diabetes or heart conditions, consult with your doctor or a registered dietitian. This information is for educational purposes and should not replace professional medical advice.
This research translation is published by Gram Research, the science division of Gram, an AI-powered nutrition tracking app.