RESEARCH UPDATE: New Study Investigates the Effects of Daily Almond Consumption on Facial Wrinkles and Skin Pigmentation
New research suggests that there may be more than one reason to add almonds to your daily skin care routine. A new study by researchers at the University of California, Davis1 found that eating almonds daily in place of typical calorie-matched snacks improved measures of both wrinkle severity and skin pigmentation in postmenopausal women. The study was funded by the Almond Board of California and confirms and expands upon findings in a 2019 study.2
In this 6-month randomized controlled trial, 49 healthy postmenopausal women with Fitzpatrick skin type 1 or 2 (characterized by increased tendency to burn with sun exposure) completed the study. Participants were randomly assigned to one of two groups: in the intervention group, women ate almonds as a snack, which accounted for 20% of their total daily calorie intake, or 340 calories per day on average (about 2 one-ounce servings). The control group ate a calorie-matched snack that also accounted for 20% of calories: a fig bar, granola bar or pretzels. Aside from these snacks, study participants ate their regular diets and did not eat any nuts or nut-containing products.
Skin assessments were made at the start of the study, and again at 8 weeks, 16 weeks and 24 weeks. At each of these visits, facial wrinkles and facial pigment intensity were assessed using high-resolution facial imaging and validated 3-D facial modeling and measurement. Skin hydration, transepidermal water loss (TEWL) and sebum excretion were also assessed.
Researchers found a statistically significant reduction in wrinkle severity in the group consuming almonds: at 16 weeks, there was a reduction of 15% and at 24 weeks, a reduction of 16%.
There was also a statistically significant decrease in overall facial pigment intensity (unevenness of skin tone) in the almond group: a 20% reduction by week 16 that remained so at week 24. Further, body weight remained constant for both the almond group and the control group from baseline to 24 weeks.
“Daily consumption of almonds may be an effective means of improving the appearance of facial wrinkles and skin tone (indicated by decreased pigment intensity) among postmenopausal women with Fitzpatrick skin types I and II. Consumers may describe this reduced pigmentation effect as having a more even skin tone,” according to Dr. Raja Sivamani, dermatologist and lead researcher of this study.
Transepidermal water loss, skin hydration and sebum excretion were measured on the forehead and cheeks in both groups during the study:
- There were no changes in transepidermal water loss at any time point among the almond and control groups.
- At the end of the study, there were increases in skin hydration among both groups.
- Looking at sebum excretion rate, both groups showed an increase on the cheeks, but only those in the control group showed an increase in the forehead area.
“Our findings emphasize the need to look at almonds as a whole food with multiple nutrient components including alpha-tocopherol (vitamin E) and good unsaturated fats, rather than oversimplifying potential benefits due to one nutrient alone. Almonds are high in alpha-tocopherol which has antioxidant functions, and may be partially responsible for the effects that we see in both wrinkles and skin tone in postmenopausal women,” says Dr. Sivamani.
Limitations of the study include its duration of 24 weeks; results do not provide insight into the potential effects of longer-term almond intake. Additionally, the study participants were postmenopausal women with Fitzpatrick skin types I and II (characterized by increased tendency to burn with sun exposure). More research is warranted to investigate the impact of almond consumption in other populations. And, although the snacks in both groups were calorie-matched, they were not macronutrient-matched.
The unique nutrient package in almonds provides 160 calories with 6 grams of plant-based protein, 4 grams of filling dietary fiber, 13 grams of good unsaturated fats, 50% of the Daily Value for vitamin E and 20% of the Daily Value for magnesium in each one ounce healthy handful. Click here to view the full study.