by Dawne
(Burleson, TX, U.S.A.)
Answer by Dr. Albana Greca, MD, MMedSc
Hi Dawne,
I am pleased that you plan to monitor your blood sugar and work with your doctor. However, I would not recommend using either plant until its identity and safety have been confirmed.
No. Banaba is Lagerstroemia speciosa. Many ornamental crepe myrtles grown in the United States are Lagerstroemia indica or hybrids.
White, pink, red, or purple flowers do not prove that a tree is banaba. Leaf texture and fruit shape are also not enough for safe identification by a person without botanical training.
Our guide to banaba and diabetes explains the plant studied in clinical research and the limits of the evidence.
Small studies have examined standardized banaba extracts in people with type 2 diabetes or insulin resistance. Some reported modest improvements in glucose levels, but the evidence is not strong enough to consider banaba a diabetes treatment.
The products used in research are not the same as homemade tea. The concentration of a homemade preparation can vary according to the plant species, leaf age, amount used, and preparation method.
Our overview of diabetic herbs and supplement safety explains why natural products can still cause side effects and medicine interactions.
Nopal usually refers to the edible pads of certain Opuntia cactus species. Some small studies suggest that cooked nopal eaten with a meal may reduce the rise in blood glucose after eating.
However, it has not been proven to lower everyone’s glucose by 47%, and broiling is not the only preparation method studied. The effect can vary with the cactus species, portion, meal, and individual response.
Nopal contains fiber, but it does not completely block carbohydrate absorption. Learn more about meal-related glucose changes in our guide to blood sugar levels after eating.
Do not eat a cactus until an experienced plant specialist confirms that it is an edible species. It should also be free from pesticides, herbicides, animal waste, and roadside contamination.
Prickly pear pads contain large spines and tiny hair-like glochids that can injure the skin, mouth, throat, or eyes. Commercially sold food-grade nopales are a safer choice than an unidentified yard plant.
Banaba and nopal may lower glucose in some people. Combining them with insulin or diabetes tablets could increase the risk of low blood glucose.
Do not reduce insulin, metformin, or another prescribed medicine because you begin using an herb. Monitor your glucose as advised and discuss repeated changes with your doctor.
I would not use one-eighth cup of fresh yard leaves as tea because the species, dose, pesticide exposure, and safety are uncertain.
If you want to try nopal as a food, choose commercially sold edible pads, prepare them safely, and begin with a normal food portion. Avoid combining several glucose-lowering herbs at the same time.
Continue prescribed medicine, balanced meals, physical activity, glucose monitoring, and medical follow-up. These proven measures are explained in how to control diabetes safely.
Hope this helps.
Dr. Albana Greca