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Related Concept Videos

Proteins: Dietary Sources and Requirements01:28

Proteins: Dietary Sources and Requirements

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Consuming animal-based products offers high-quality proteins that contain optimal levels and combinations of essential amino acids, crucial for tissue repair and growth. Foods like eggs, milk, fish, and most meats are a source of complete proteins. Legumes and cereals are abundant in proteins; however, they typically lack a full range of essential amino acids. As a result, they are considered incomplete protein sources. Some plant sources like soybeans, quinoa, and amaranth do contain complete...
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Like all living organisms, plants require organic and inorganic nutrients to survive, reproduce, grow and maintain homeostasis. To identify nutrients that are essential for plant functioning, researchers have leveraged a technique called hydroponics. In hydroponic culture systems, plants are grown—without soil—in water-based solutions containing nutrients. At least 17 nutrients have been identified as essential elements required by plants. Plants acquire these elements from the...
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Body:Improving a drug's stability in the gastrointestinal (GI) tract is paramount for enhancing its bioavailability and therapeutic effectiveness. Various strategies are employed to protect the drug from the harsh gastric milieu and to ensure its release and absorption at the desired site within the GI tract.Polymer coatings are one such method used to shield drugs from the stomach's acidic environment. By preventing premature drug release, these coatings improve the bioavailability of unstable...
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Overview of Protein Metabolism01:21

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Proteins are broken down into amino acids during digestion. Unlike fats and carbohydrates, which are stored for later use, proteins are not. Instead, amino acids are either used to produce ATP through oxidation or contribute to the creation of new proteins for the growth and repair of the body. Any surplus amino acids from the diet are converted into glucose or triglycerides rather than excreted.
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Protein Digestion01:02

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Protein digestion begins in the stomach, where the highly acidic environment can easily disrupt protein structure by exposing the peptide bonds of polypeptide chains. After polypeptide chains are broken into individual amino acids by a series of digestive enzymes, the amino acids are transported to the liver via the bloodstream to produce energy.
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Related Experiment Video

Updated: Jan 8, 2026

In Ovo Feeding of Commercial Broiler Eggs: An Accurate and Reproducible Method to Affect Muscle Development and Growth
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Multi-enzyme supplementation enhances performance, intestinal and skeletal development in broilers fed low-nutrient

Yuanli Cai1, Mingchen Zhang2, Okasha Hamada3

  • 1College of Life Science, Qilu Normal University, Jinan, Shandong 250200, China.

Poultry Science
|December 14, 2025
PubMed
Summary

Multi-enzyme supplementation improved broiler growth performance and digestive function. Enzymes counteracted negative effects of a low-nutrient diet on skeletal development and nutrient absorption.

Keywords:
Broiler chickenDigestive enzyme activityMulti-enzymeTibial development

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Area of Science:

  • Animal Science
  • Poultry Nutrition
  • Digestive Physiology

Background:

  • Poultry production faces challenges with nutrient-dense diets.
  • Zeolite dilution can reduce nutrient levels in broiler feed.
  • Enzyme supplementation may mitigate nutrient deficiencies.

Purpose of the Study:

  • To evaluate multi-enzyme effects on broilers fed a low-nutrient diet.
  • To assess impacts on growth, digestion, and bone development.
  • To determine if enzymes can counteract nutrient dilution effects.

Main Methods:

  • 384 Arbor Acres broilers used in a 2x2 factorial design.
  • Diets included basal or low-nutrient (zeolite-diluted) formulations.
  • Enzyme supplementation was tested against control groups.

Main Results:

  • Enzymes significantly improved body weight, feed intake, and feed efficiency.
  • Low-nutrient diet altered intestinal morphology; enzymes normalized it.
  • Enzyme addition enhanced duodenal amylase activity and improved tibial development.

Conclusions:

  • Multi-enzyme supplementation effectively mitigates adverse effects of nutrient reduction.
  • Enzymes enhance broiler growth, digestive function, and skeletal integrity.
  • This strategy supports sustainable poultry production with reduced nutrient density.