14
Mar

Freeze-dried Strawberry Powder

Metabolic syndrome is the medical term for a combination of diabetes, high blood pressure (hypertension), and obesity. It puts anybody at greater risk of getting coronary heart disease, stroke, and other conditions that affect blood vessels. Metabolic syndrome is associated with increased oxidative stress.

Oxidative stress is due to the imbalance of free radical production and antioxidant status in the body and can lead to oxidative damage. Free radicals are molecules containing unpaired electrons, which causes them to be highly reactive. Because of the reactive nature of free radicals, if there is excess free radical production and inadequate antioxidants to neutralize them, the free radicals can then cause oxidative damage to cells and tissues of the body. Antioxidants are substances that scavenge and neutralize free radicals (such as reactive oxygen species) to prevent oxidative damage to tissues and cells they cause.

Phytochemicals are defined as bioactive nutrient plant chemicals in fruits, vegetables, grains, and other plant foods that may provide desirable health benefits beyond basic nutrition to reduce the risk of major chronic diseases (Liu, 2004).

Many fruits and vegetables contain high amounts of antioxidants. The major antioxidant in strawberries is ascorbic acid, or vitamin C, however, polyphenols are also significant contributing sources of the antioxidant capacity of the fruit, the largest of which are anthocyanins and ellagitannins.

Strawberries contain high amounts of beneficial plant compounds and antioxidants, including pelargonidin, ellagic acid, ellagitannins, and procyanidins. More than 25 different anthocyanins have been found in strawberries. Pelargonidin is the most abundant. Strawberries are consistently ranked among the top sources of phenolic antioxidants. Ellagitannins and ellagic acid comprise a large part of these antioxidants in strawberries.

In a study among 16 women with metabolic syndrome, consuming 50 g freeze-dried powder blended in water daily for four weeks, the freeze-dried powder was found to reduce total and LDL cholesterol levels and lipid peroxidation. Freeze-dried strawberry powder improves lipid profile and lipid peroxidation in women with metabolic syndrome.

References

  • Basu, Arpita, et al. “Freeze-dried strawberry powder improves lipid profile and lipid peroxidation in women with metabolic syndrome: baseline and post intervention effects.” Nutrition journal 8.1 (2009): 1-7.
  • da Silva, Fatima Lopes, et al. “Anthocyanin pigments in strawberry.” LWT-Food Science and Technology 40.2 (2007): 374-382.
  • Bridle, Peter, and Cristina García-Viguera. “Analysis of anthocyanins in strawberries and elderberries. A comparison of capillary zone electrophoresis and HPLC.” Food Chemistry 59.2 (1997): 299-304.
  • Aaby, Kjersti, Dag Ekeberg, and Grete Skrede. “Characterization of phenolic compounds in strawberry (Fragaria× ananassa) fruits by different HPLC detectors and contribution of individual compounds to total antioxidant capacity.” Journal of agricultural and food chemistry 55.11 (2007): 4395-4406.

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