Wild and commercial samples of Achillea millefolium L.: proximate composition and individual compounds obtained by chromatography
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resumo
Medicinal plants have been used since ancient times and emerge nowadays as alternative to
synthetic products, due to their richness in bioactive compounds. In a society that requires new and
safer products, due to the growing concern with health and nutrition, medicinal plants are now
being used not only in traditional medicine but also in a number of food and pharmaceutical
products [1]. Achillea millefolium L., belongs to Asteraceae family and it is commonly known as
yarrow, very common in mountain meadows, pathways, crop fields and homegardens. Widespread
across Europe, it’s infusion, decoction and alcoholic extract are widely used as an herbal remedy to
treat digestive problems, diabetes, hepato-biliary diseases and amenorrhea, showing also antitumor,
antimicrobial, anti-inflammatory and antioxidant properties [2,3]. In the present work, commercial
and wild samples of A. millefoilum were characterized regarding the proximate composition and
individual compounds namely, free sugars, organic acids, fatty acids and tocopherols, determined
by chromatographic techniques coupled to different detectors (HPLC-RI, HPLC-DAD, GC-FID e
HPLC-fluorescence, respectively). Carbohydrates, followed by proteins, were the major
macronutrients in both samples. Commercial yarrow gave higher content of fat (and saturated fatty
acids, mainly palmitic acid C16:0), proteins, ash, energetic value and total sugars (including
fructose, glucose, sucrose and trehalose). Wild sample revealed higher levels of carbohydrates; it
also showed raffinose (not detected in the commercial sample), polysaturated fatty acids (mainly
linoleic acid, C18:2n-6) and organic acids (including malic, oxalic and quinic acids). Regarding
tocopherols, both samples showed similar profile, although the wild sample gave higher levels of
total tocopherols; γ-Tocopherol was the most abundant isoform; δ-Tocopherol was not found in the
samples.
Data obtained are clear evidence that traditional medicinal plants can be used not only in household
products but also in pharmaceutical and food industry as a source of new and safer bioactive
compounds.
