The short answer
Gymnema can change glucose measures and insulin requirements, but added clinical hypoglycemia with insulin aspart protamine has not been established. The inspected insulin study does not identify this premix.
What this answer covers
Gymnema sylvestre leaf extract GS4; other powders, extracts and blends differ. NovoLog Mix70/30 contains two insulin components.
- Supplement or preparation
- Gymnema sylvestre
- Medication ingredient
- insulin aspart protamine, human
An insulin study gives a reason for review
A small study added GS4 leaf extract to insulin and reported lower insulin requirements and glucose measures. This suggests a possible treatment effect that warrants review when use changes.
The exact insulin was not established
The inspected abstract does not identify insulin aspart protamine or a specific premix. It also does not establish a rate of clinical hypoglycemia. Lower insulin requirements cannot be converted into a universal dose reduction.
An extract result does not define every product
The study tested a particular water-soluble leaf extract. Its findings cannot predict every Gymnema product, and its proposed explanation involving endogenous insulin is not proof of pancreatic regeneration.
Use the individual monitoring plan
Discuss the exact supplement and amount with the diabetes team and follow your glucose-monitoring and low-glucose treatment plan. Do not change the premix dose yourself. No protective herb-spacing interval follows from the study.
Evidence and practical considerations
Side effects & toxicity
An insulin study shows glucose/requirement changes but does not verify the exact premix or establish added clinical hypoglycemia.
- Exact scope
- Gymnema sylvestre leaf extract GS4; other powders, extracts and blends differ. NovoLog Mix70/30 contains two insulin components. with Insulin aspart protamine human RxCUI352385 IN as part of NovoLog Mix70/30, SC only.
- Medication form and route
- subcutaneous insulin premix; oral supplement
What remains uncertain
- Combination label cannot isolate protamine component; no exact herb-event rate or universal adjustment.
Factors that may matter: Fixed component ratio; Meals; Preparation; Dose; Other glucose-active treatment.
Read the supporting source summaries
Source 1: current product label
dailymed.nlm.nih.gov · Source check Sep 10, 2026
Population: Adults prescribed the fixed insulin-aspart premix
Hypoglycemia can be severe; niacin can reduce glucose lowering. Fixed ratio does not permit independent basal/prandial adjustment. Dose within15minutes before meal start; type2 patients may also dose after meal start as labeled.
How this applies: Exact RxCUI352385 IN insulin aspart protamine, human, addressed as component of this labeled fixed combination.
Combination-product evidence cannot isolate the protamine component or represent pure soluble aspart, NPH or other premixes. No herb-specific event rate.
Source 2: original human study
pubmed.ncbi.nlm.nih.gov · Source check Sep 10, 2026
Population: 27insulin-dependent diabetes patients given GS4.
Insulin needs and glucose measures decreased with GS4; glycosylated measures remained above controls.
How this applies: Indirect for insulin aspart protamine as part of NovoLog Mix70/30; original preparation, drug and endpoint retained.
Abstract does not identify this insulin premix, establish hypoglycemia incidence or test spacing. Proposed beta-cell recovery remains a hypothesis.
Research assessment: · Open full citations ↗
Review and change history
- Publication status
- Published research summary
- Clinical review
- Not yet recorded
| Date | Update |
|---|---|
| Article prepared | |
| Prepared exact protamine-aspart ingredient article with fixed-combination and clinical endpoint limits. | |
| Research summary published |
Article revision: 6d97032b10d492f1
This guide brings together the evidence records used by our interaction checker. Each finding retains its own preparation limits, research date, and source summaries.
Full citations require verification. Reading this answer and the source summaries does not.
Taking other supplements or medications?
Use the checker to explore your other combinations. Ask a pharmacist to review the exact products, amounts and medical conditions in your complete list.
Open the interaction checkerInformation, not medical advice. Do not change prescribed treatment based on this guide.