Phenolic compounds in lime juice

Citrus fruits contain bioactive compounds, primarily phenolics, which contribute to their numerous health benefits. Phenolic substances, also known as polyphenols, can be described chemically as compounds with an aromatic ring that has one or more hydroxy substituents, including functional derivatives.

The phenolic compounds present in citrus fruits include phenolic acids and flavonoids, such as flavones, flavanones, and flavonols. These compounds exhibit various physiological properties, including anti-inflammatory, antiallergic, anticarcinogenic, antihypertensive, and antiarthritic activities.

Sweet lime, a type of citrus fruit, is typically consumed either in its fresh form or processed into juice. The juice is renowned for its significant content of polyphenolic compounds.

Among the phenolic acids found in sweet lime, the most common ones are caffeic, p-coumaric, sinapic, ferulic, and chlorogenic acid. These phenolic compounds act as secondary metabolites and possess antioxidant properties.

Caffeic acid is a naturally occurring phenolic acid that can be found in various plant-based foods. It is believed to have antioxidant and anti-inflammatory effects and may also impact the immune system.

P-coumaric acid (p-CA) is a hydroxy derivative of cinnamic acid and is known for its antioxidant, antimicrobial, antimutagenic, and immunoregulatory activities.

Ferulic acid (FA), also referred to as 4-hydroxy-3-methoxycinnamic acid, is a phenolic compound and a significant constituent of plant cell walls. It acts as a plant-based antioxidant primarily used in anti-aging skincare products.

Chlorogenic acid, a phenolic compound belonging to the hydroxycinnamic acid family, is responsible for the sour and bitter taste associated with it.
Phenolic compounds in lime juice

Phenolic compounds in bilberry juice

Phenolic compounds regulate the various metabolic functions including structure and growth, pigmentation and are resistant to different pathogens in plants.

Plant phenolics are considered to have a key role as defense compounds when environmental stresses, such as high light, low temperatures, pathogen infection, herbivores, and nutrient deficiency, can lead to an increased production of free radicals and other oxidative species in plants.

Bilberry juice are considered one of the richest sources of dietary anthocyanins and antioxidants. Many phenolic compounds have been identified in bilberries and differences in their phenolic profiles have been observed and linked to numerous factors. Anthocyanins represent the most important group in bilberries, contributing to their attractive purple-blue color hues but also defining quality traits.

These polyphenolic components have high-antioxidant content, and are believed to be the key compounds responsible for the many reported health benefits of consuming bilberry juice.

The anthocyanin composition of bilberries is characterized by 15 anthocyanin glycosides in which five antocyanidins (delphinidin, cyanidin, petunidin, peonidin, malvidin) are combined with three types of sugars (galactose, glucose, arabinose).
Phenolic compounds in bilberry juice

Phenolic compound in fruit juice

Phenolic compounds occur naturally in fruits as well as in processed products from fruits such as fruit juice. It is responsible for the browning and bruising that often occur in ripening fruit. The specific composition and level of phenolic compounds can be used as an indicator of fruit juice adulteration.

What is phenolic compounds? It is the most widely distributed category among the different categories of phytochemicals or bioactive compounds.

Phenolic compounds have an important role in the flavor and color of plants and are significant chemical and nutritional components. Phenolic compounds can form complexes with proteins. These complexes increase the turbidity of fruit juice, beer and wine.

Phenolic compounds present in fruits have a varying effect in inhibition of the growth of pathogenic bacteria. 

The most predominant phenolic compounds in fruit juices are the anthocyanins. For example, berries contain phenolic antioxidant compound called ellagic acid, which blocks metabolic pathways that can lead to cancer.

Published in Journal of Agricultural and Food Chemistry (September 2005) show that phenolic compounds can inhibit colon cancer growth and kill existing cancer cells in the body.
Phenolic compound in fruit juice