Oxidative stress is a pathological condition caused by the breakdown of the physiological balance, in a living organism, between the production and elimination of oxidizing chemical species by antioxidant defense systems. This condition is associated with numerous human pathologies. [PERSON] et al. 's study investigated whether a herbal blend consisting of _Cleistocalyx operulatus_ teas could improve health. A mixture of _C. operculatus_ and _Mentha__arrensis_, at a ratio of 7/3, led to the best results in terms of taste (sensory tests). Furthermore, the potential health benefits against oxidative stress remained high compared to pure _C. operculatus_ infusion [9]. The high global consumption of coffee creates problems related to disposing of or processing by-products. However, valuable chemical compounds can be extracted from spent coffee grounds and used in the food industry. [PERSON] et al. investigated the parameters influencing the extraction of caffeine and polyphenols, such as chlorogenic acid, neochlorogenic acid and caffeic acid, and evaluated the antioxidant properties of such extracts. The results obtained showed that a low extraction temperature (20 \({}^{\circ}\)C) allowed the extraction of bioactive compounds from spent coffee grounds, reducing the environmental impact and the costs of the extraction process [10]. The production of bioactive compounds from microalgae biomass using efficient and environmentally friendly technologies is of great interest to researchers. In [PERSON] et al. 's study, the interest was focused on the recovery of bioactive components with high added value from the microalgae _Chloerella vulgaris_. For this purpose, conventional solid-liquid extraction was compared to microwave-assisted extraction (MAE) and super-critical fluid extraction (SFE). The results revealed that conventional extraction had the highest yield. However, MAE and SFE methods derived competitive or better quality extracts with a significantly shorter extraction time [11]. Aging is a natural phenomenon, which is accompanied by a progressive decline in various functions of an organism. The changes that occur can, at least in part, be alleviated via exercise, an adequate diet and some natural adjuvants. In [PERSON] et al. 's review, the potential of bay leaf polyphenols (_Laurus nobilis_ L.) to modulate body composition was evaluated. The review shows that the main polyphenols of bay leaves have various positive effects on bones, skeletal muscle and adipose tissue. Therefore, they could promote healthier aging [12]. Allelopathy plays a very important role in the defense of plants, which emit substances called allelopathics that inhibit the growth of nearby plants, gaining an ecological advantage. In [PERSON] et al. 's study, the possible allelopathic influence of aqueous extracts derived from the plant species chia (_Salvia hispanica_ L.), black cumin (_Nigella sativa_ L.), wormwood (_Artemisia absinthium_ L.) and nettle (_Urtica dioica_ L.) was investigated based on the germinative growth of seeds and the morphometric characteristics of pepper (_Capsicum annuuum_ L.), spinach (_Spinacia oleracea_ L.) and lettuce (_Lactuca sativa_ L.) seedlings kept under laboratory conditions. The results obtained show that at various treatment concentrations, spinach seeds with aqueous chia extract (2.5%) before germination stimulate the germination of spinach seeds, while wormwood herbs and chia extracts (2.5 and 5%) stimulate the germination of lettuce seeds and growth of the hypocotyl and radicle lengths of the developed seedlings. The treatment of pepper and lettuce seeds with aqueous nettle extract (10%) completely inhibited seed germination [13]. Based on the circular economy principle, [PERSON] et al. transformed spent coffee grounds into powdered activated carbon via chemical activation using potassium hydroxide.