Almonds Provide Double-Barreled Protection against Diabetes and Cardiovascular Disease
Lessening after-meal surges in blood sugar helps protect against diabetes and cardiovascular disease, most likely by lessening the increase in cholesterol-damaging free radicals that accompanies large elevations in blood sugar. This is one reason why low- glycemic index diets result in lower risk of diabetes and heart disease.
Almonds appear to not only decrease after-meal rises in blood sugar, but also provide antioxidants to mop up the smaller amounts of free radicals that still result. (Jenkins DJ, Kendall CW, Journal of Nutrition)
Researchers fed 15 healthy subjects 5 meals providing a comparable amount of carbohydrate, fat and protein: 3 test meals (almonds and bread, parboiled rice, and instant mashed potatoes) and 2 bread control meals. Blood samples, taken before each meal and 4 hours afterwards, showed levels of protective antioxidants increased after the almond meal, but decreased after the other meals. And not only did the almond meal increase antioxidant levels, but unlike the other foods, almonds also lowered the rise in blood sugar and insulin seen after eating.
Further research shows that eating almonds along with a high glycemic index food significantly lowers the glycemic index of the meal and lessens the rise in blood sugar after eating. (Jones AR, Kendall CW, Metabolism)
In this study, after an overnight 10-12 hour fast, 9 healthy volunteers were randomly fed 3 test meals and 2 white bread (high glycemic) control meals on separate days. Each meal contained 50 grams of carbohydrate from white bread eaten either alone or in combination with 1, 2, or 3 ounces of almonds. To check subjects' rise in blood sugar, blood samples were taken for glucose analysis immediately after eating, and at 15, 30, 45, 60, 90 and 120 minutes.
Eating almonds reduced the glycemic index (GI) of the meal and subjects' rise in blood sugar in a dose-dependent manner - the more almonds consumed, the lower the meal's GI and the less the rise in subjects' blood sugar after eating.
When one-ounce of almonds was eaten along with white bread, the GI of the meal (105.8) was comparable to eating white bread alone, but when two ounces of almonds were consumed with the white bread, the GI dropped to 63, and when 3 ounces of almonds were eaten, the GI was only 45.2 - less than half the GI of the white bread only meal.
Subjects' blood sugar rose 2.8 mmol/L after eating only white bread. When one ounce of almonds was eaten with the bread, blood sugar rose 2.2 mmol/L. Eating two ounces of almonds with the bread resulted in a rise in blood sugar of 2.0 mmol/L, and eating three ounces of almonds caused blood sugar to rise only 1.6 mmol/L - less than half the rise seen after eating white bread alone.
Practical Tips: Don't just enjoy almonds as a between-meal snack. Spread a little almond butter on your toast or down the center of a stalk of celery. Add a handful of lightly roasted almonds to your salad or chop and use as a topping for pasta, steamed or healthy sautéed vegetables. When eating foods with a higher glycemic index, including almonds in the meal can help keep your blood sugar under control.
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