Diet, Sensors and Tiny Protein Changes All Shape Heart Risk in Diabetes
People with diabetes face higher chances of heart disease, and new research shows that factors beyond blood sugar matter. A study of processed foods, a study of continuous glucose monitors, and a mouse‑study of protein lactylation each point to separate ways that heart risk can rise even when glucose looks controlled.
Key takeaways
- Eating fewer ultraprocessed foods lowers diabetes risk for everyone, no matter their genetic makeup [1].
- Advanced CGM metrics that capture glucose spikes and dips predict higher 10‑year heart‑disease risk, even after accounting for fasting glucose and A1c [2].
- In diabetic mice, a specific protein modification called lysine lactylation protects the heart; loss of this mark worsens cardiac damage [3].
Processed foods and lifestyle habits
A large cohort study examined how intake of ultraprocessed foods (UPF) interacts with genetics and daily habits measured by wearables — devices that track movement and sleep. Participants who ate less UPF had a lower chance of developing type 2 diabetes across all genetic risk levels. The benefit persisted even for those with the highest genetic susceptibility [1].
The researchers also looked at two modifiable behaviors: moderate‑to‑vigorous physical activity and getting enough sleep. Among people who ate a lot of UPF, meeting activity targets or sleeping adequately was linked to a reduced diabetes risk. Wearable‑derived data therefore may help identify practical steps to offset the harms of a processed‑food diet [1].
These findings suggest that diet quality and everyday habits matter for heart health in diabetes, independent of genetics. Reducing UPF intake could be a universal preventive measure, while encouraging movement and sleep may especially help those who struggle to change their diet.
What continuous glucose monitors reveal
Traditional blood‑sugar tests—fasting plasma glucose (FPG) and hemoglobin A1c (HbA1c)—provide snapshots of average glucose. A newer study used continuous glucose monitoring (CGM) to capture glucose dynamics over days. Researchers created CGM‑based profiles that measured time spent above 140 mg/dL, variability, and other patterns.
People whose CGM showed more than 15.4 % of readings above 140 mg/dL faced a 2 % higher estimated 10‑year cardiovascular disease (CVD) risk. They also had 21‑26 % higher odds of hypertension (high blood pressure) and dyslipidemia (abnormal blood fats), even after adjusting for fasting glucose [2].
The CGM profiles often disagreed with traditional classifications. Up to 84.2 % of individuals labeled as pre‑diabetic by FPG or A1c fell into CGM groups with higher dysglycemia. Those CGM groups carried a 6‑7 % higher 10‑year CVD risk and worse cardiometabolic risk factors (CMRFs) than low‑dysglycemia groups [2].
These data indicate that CGM can uncover hidden glucose swings that contribute to heart risk, beyond what single‑time‑point tests show. For people with diabetes, looking at CGM‑derived metrics may give a fuller picture of cardiovascular danger.
Tiny protein changes in the diabetic heart
Beyond diet and glucose patterns, molecular changes inside heart cells may also drive risk. In a mouse model of diabetic cardiomyopathy (DbCM)—a heart‑muscle disease caused by diabetes—researchers focused on a protein called Cryab and a chemical tag known as lysine lactylation (Kla).
Kla is a post‑translational modification, meaning it adds a small chemical group to a protein after it is made. The study found that Cryab‑Kla levels were reduced in the hearts of diabetic mice. When the Kla site on Cryab was mutated, heart damage worsened both in living mice and in cell cultures [3].
Mechanistically, Cryab‑Kla helped stabilize another protein, Hspa1b, and together they blocked activation of the MAPK signaling pathway, which is known to promote cardiac dysfunction. Loss of Cryab‑Kla allowed MAPK signaling to proceed, leading to poorer heart function in the diabetic mice [3].
These results suggest that enhancing protein lactylation, or protecting Cryab‑Kla, could be a novel way to slow heart disease in diabetes. While the work is still in early animal models, it opens a new biological avenue beyond glucose control.
Why these findings matter together
The three studies each highlight a different non‑glycemic contributor to cardiovascular risk in diabetes:
- Diet quality – Less UPF intake consistently lowered diabetes risk, independent of genetics.
- Glucose dynamics – CGM metrics captured harmful glucose spikes that traditional tests missed, linking them to higher heart‑disease risk.
- Molecular pathways – Protein lactylation in heart cells appears to shield against diabetic heart damage.
Taken together, the evidence pushes clinicians and patients to look beyond just lowering A1c. A heart‑healthy approach may need to combine better food choices, active lifestyles, sleep hygiene, CGM‑guided glucose monitoring, and—potentially in the future—therapies that target protein modifications.
What remains uncertain
All three investigations have limits. The UPF study was observational; it cannot prove that cutting processed foods will directly prevent heart disease, only that the association exists. The CGM research was cross‑sectional, so it shows correlation but not causation between glucose spikes and cardiovascular outcomes. The lactylation work was performed in mice; human hearts may respond differently, and safe ways to boost Kla are not yet known.
Future trials will need to test whether interventions—such as dietary counseling, CGM‑driven feedback, or drugs that modify protein lactylation—actually lower heart events in people with diabetes.
Bottom line
Heart risk in diabetes is shaped by more than blood‑sugar numbers. Cutting ultraprocessed foods, tracking glucose patterns with continuous monitors, and understanding tiny protein changes inside heart cells each offer separate clues to protect the cardiovascular system. As research moves forward, a broader view of lifestyle, technology and molecular biology may become essential for keeping the hearts of people with diabetes healthier.
