Abstract
Due to ban on using antibiotics in feed industry, awareness of using natural feed additives have led to a great demand. The interest of plants phenolic compounds as a potential natural antioxidant source has been considered in research community due to their predictable potential role as feed additives in poultry and swine production. However, the mode of action for their functional role and dosage recommendation in animal diets are still remain indistinct. Taking into account, the present review study highlights an outline about the mode of action of phenolic compound and their experimental uses in poultry and swine focusing on the growth performance, antioxidant function, immune function, antimicrobial role and overall health status, justified with the past findings till to date. Finally, the present review study concluded that supplementation of phenolic compounds as natural feed additives may have a role on the antioxidant, immunity, antimicrobial and overall production performance in poultry and swine.
Highlights
At present, the consumer’s demand for safe animal food is increasing which created a challenge for animal scientists and the interest for using natural feed additives has been articulated [1]
Phenolic compounds can be defined as any compound having a benzene ring with one or more hydroxyl group as esters, methylesters etc [1, 2]
Supplementation of oregano powder as phenolic compound at 150 mg/kg could increase about 8.4% higher average daily gain (ADG), along with 7.9% higher feed intake (FI) at the whole experimental period of broilers [40]
Summary
The consumer’s demand for safe animal food is increasing which created a challenge for animal scientists and the interest for using natural feed additives has been articulated [1]. In Pekin ducks, a study noted that dietary inclusion of grape seed extract (anthocyanidins, catechins) as phenolic compounds at 0.2% diets could increase about 3.1% final body weight, and could improve FCR, antioxidant status, immunity, meat quality, and beneficial microflora of gut [52]. In another recent study, dietary supplementation with combination of essential oil (cinnamaldehyde 15%, and thymol 5%) with organic acids could enhance about 13.5% average daily weigh gain and about 5.6% higher final body weigh in weaned piglets [53]. Lower serum MDA level in laying hens fed with thyme and rosemary dry leaf powder as source of phenolic compounds at 0.9% level was reported [50]
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