## 1 Introduction
In Spain it is called 'licor de cereas' or 'licor de guindas', while in Portugal 'grinjinha' [14]. Cherry fruits and juice are characterized by a high content of polyphenols, anthocyanins, flavonoids, vitamins as well as beta caroten [20; 21]. In traditional medicine, they have been used as prophylactic agents against [PERSON]'s disease, cardiovascular damage, and diabetes diseases [19; 22; 23]. The anthocyanins contained in these fruits may have anti-inflammatory effects and may provide additional supportive therapy for chronic diseases associated with oxidative stress [24]. The plum (_Prunus domestica_ L.) is a drupe fruit that belongs to the subgenus _Prunus_[25]. The plum fruit contains phenolics, vitamins, minerals, and organic acids as well. The fruits of this plant are characterized primarily by a very rich phenolic composition, including such compounds as chlorogenic acid, gallic acid, dihydroxybenzoic acid, rutin, esculin, quercetin, as well as less known nervolyl-glucoside, p-coumaroyl-glucose, vanillic acid-glucosidase, 3,4-dihydroxybenzoyl-glucose, quercetin-3-O-pentosides, quercetin-5-O-rhannoside, quercetin-pentoside-rhannosides [26]. In recent years, plums have been considered foods with health-promoting properties. Their antioxidant, anti-inflammatory, anti-allergic, and anti-bacterial properties, cognitive improvement, and supportive, positive effects in cardiovascular diseases have been described by many authors [25; 27; 28]. Strawberries (_Fragaria \(\times\) ananasa_ Duch.) are appreciated for their nutritional value, taste, and antioxidant properties, mainly due to phenolics (phenolic acid, anthocyanin, and flavonoids), vitamins (such as vitamin C) and beta-carotene content. In recent years, there has been an increasing interest in strawberry fruits due to their nutritional quality and antioxidant properties [29]. Strawberry fruits are an important source of polyphenols in the human diet and are considered a functional food [30]. Some studies reported the beneficial effects of strawberries. For example, the treatment of melanoma cells with strawberry fruit crude extracts produced a remarkable reduction in cell proliferation, paralleled with both the lowering of the intracellular levels of polyamine and the enhancement of tissue transglutaminase [31]. Blackcurrant (_Ribes nigrum_ L.) is an important fruit-growing crop, growing on a large scale mainly in Europe and Russia. Berries are used mainly in the production of fruit juices [32]. Blackcurrant fruits are widely recognized for containing high levels of polyphenols and anthocyanins [33]. The health effects of this fruit, including antioxidant and anti-inflammatory or antibacterial activity, are well documented [33; 34; 35]. Fruits rich in anthocyanins also have an anti-cancer effect, which has been observed in numerous studies [36]. Raspberry fruits (_Rubusidae_ L.) are a popular antioxidant, antimicrobial, and anti-inflammatory remedy used in traditional medicine. The fruits are often used to treat the common cold and fever [37]. They contain a lot of flavonoids, anthocyanins, phenolic acids, and vitamin C [38; 39]. Quince (_Cydonia oblonga_ Miller) is also a valuable fruit for the production of nalewka. Quince is a sour and hard fruit rather not suitable for consumption in a fresh state. However, it is often used to prepare jam, jelly, liqueur, or marmalade. The fruits of this plant are a source of nutrients such as carbohydrates, vitamins, and minerals, especially polyphenols, with various health-promoting properties, such as antioxidative, antibacterial, antiulcer, cardioprotective, anti-inflammatory, antidiabetic, and antiallergic [40; 41]. The aim of the study was to compare the antioxidant activity and polyphenols, anthocyanin, and tannin, as well as gallic acid content in three nalewkas during, long-time storage. Three types of homemade nalewkas: cherry, plum, and multifruit nalewka called 'ratafa' produced in 1997 and from 2013 to 2019 were analyzed.