How much do you know about feed-grade tannins?

Currently, the "ban on antibiotic growth promoters in animal feed" has become a global trend in livestock production, profoundly impacting the improvement of livestock product quality and safety, boosting the supply of eco-friendly, high-quality animal products, reducing farming costs, enhancing livestock exports, and ultimately supporting the sustainable development of the livestock industry. Tannins, as an alternative to antibiotics, have shown promising potential for use in animal production—could you please elaborate on how tannins fulfill their antibiotic-replacement role in practical animal farming scenarios? Natural hydrolyzable tannins have been used to treat human diarrhea for centuries, and their application in animal production has also been well-established abroad, with nearly six decades of experience. In general, hydrolyzable tannins exhibit strong antibacterial, anti-inflammatory, antioxidant, and antiparasitic properties, effectively inhibiting the majority of both plant- and animal-origin pathogenic microorganisms. When applied in animal production, they not only enhance overall animal health and improve the safety of animal-derived products but also deliver significant economic benefits. Historically, however, tannins were often associated with three negative attributes in animal production: poor palatability, feed-blocking effects, and anti-nutritional properties. The issue of poor palatability stems from tannins' astringent taste, which reacts with salivary proteins, leading to a feed-blocking sensation. Additionally, condensed tannins—such as those found in sorghum—tend to form indigestible complexes with proteins, disrupting normal metabolic processes. Moreover, condensed tannins can bind to cells lining the intestinal tract, reducing the permeability of the intestinal wall. This is precisely why condensed tannins are considered anti-nutritional. In contrast, hydrolyzable tannins form soluble complexes with proteins under alkaline conditions, which can then be broken down into low-molecular-weight polyphenols like gallic acid and ellagic acid—compounds that are readily absorbed by the body. As a result, hydrolyzable tannins do not interfere with protein metabolism, addressing one of the key concerns related to condensed tannins. Beyond their broad-spectrum antimicrobial, anti-inflammatory, and antiparasitic activities, hydrolyzable tannins contain natural polyphenolic compounds that selectively inhibit harmful bacteria while promoting the growth of beneficial ones. By rebalancing the gut microbiome, they help strengthen the body’s natural defenses against most pathogenic invaders. Hydrolyzable tannins achieve this through a competitive exclusion mechanism, selectively targeting specific bacterial strains while exerting cytotoxic effects to suppress harmful bacteria. At the same time, they actively encourage the proliferation of beneficial bacteria such as lactobacilli and bifidobacteria, while inhibiting the reproduction of certain intestinal parasites. As a result, hydrolyzable tannins have proven highly effective in managing bacterial enteritis and diarrhea in piglets, offering a safe and sustainable solution for improving animal health and productivity.

2025-01-18

Reducing costs or boosting efficiency—choosing the right product makes all the difference.

Since the end of 2021, the livestock industry has seen growing calls for "cost reduction and efficiency improvement," driven by persistently sluggish market conditions and soaring prices of key feed ingredients like corn and soybean meal—prices that have repeatedly hit new highs. Under immense pressure to survive, China’s animal husbandry and feed sector, as it undergoes transformation and upgrading, now more than ever needs green, safe, and highly effective feed additive products and tailored solutions. These innovations are crucial for helping businesses tackle the critical challenges and pain points they face in their quest to cut costs and boost productivity. Meanwhile, with the continuous expansion of modern, intensive, and large-scale farming practices, animals are increasingly susceptible to stress-related diseases. Stress is an adaptive response mechanism in animals, broadly categorized into immune stress, oxidative stress, and heat stress. As temperatures begin to rise during this transitional season, heat stress in livestock is gradually becoming more pronounced. This, coupled with the accompanying oxidative stress, is already causing significant economic losses to the livestock industry—losses that can no longer be ignored! In the era of antibiotic-free production, tannic acid has earned widespread recognition and adoption within the industry due to its remarkable astringent and anti-diarrheal properties. Research shows that hydrolyzable tannins significantly enhance growth performance and intestinal health in monogastric animals by exerting a range of beneficial effects, including astringency, antioxidant activity, antibacterial and antimicrobial actions, as well as anti-inflammatory benefits.

2025-01-18

The Versatile Roles and Advantages of Emulsifiers in the Feed Industry

Emulsifiers, a class of essential surfactants widely used in the feed industry, play a crucial role in enhancing fat digestion and absorption. By reducing surface tension at the oil-water interface, they effectively promote fat emulsification, thereby improving fat utilization and boosting overall animal productivity. Next, we’ll delve deeper into the key characteristics and mechanisms of action of emulsifiers, as well as their application in poultry feed. **Chemical Properties of Emulsifiers:** - **Surface Activity:** Emulsifiers possess both hydrophilic and lipophilic groups, enabling them to efficiently facilitate the emulsification process between immiscible oil and water phases. - **Stability Influence:** The pH level significantly impacts emulsifier stability, particularly for ionic emulsifiers. Extreme pH conditions—whether too high or too low—can compromise their emulsifying effectiveness. **Physiological Functions and Mechanisms of Action:** - **Enhanced Fat Absorption:** Emulsifiers help form micelles in the intestinal tract, increasing the digestibility and bioavailability of fatty acids for livestock and poultry. - **Optimized Production Performance:** By reducing abdominal fat deposition and liver lipid content while boosting fat accumulation in muscle tissue, emulsifiers improve slaughter performance in broilers. - **Facilitated Fat Emulsification:** Working synergistically with bile acids, emulsifiers break down fats into tiny droplets, making them more accessible to lipases for efficient digestion and absorption. - **Improved Gut Microbiota:** Emulsifiers positively modulate gut microbial communities, supporting enhanced immune function and elevating levels of immunoglobulins in the bloodstream. - **Boosted Mineral Absorption:** Beyond improving the utilization of difficult-to-digest compounds like unsaturated and long-chain fatty acids, as well as sterols, emulsifiers also enhance the absorption of various mineral elements in animals. **Applications of Emulsifiers in Poultry Feed:** - **Fortifying Young Animal Diets:** Adding emulsifiers—especially physiological options like bile acids or bile acid salts—to young poultry diets helps compensate for insufficient endogenous bile acid secretion, thereby optimizing digestive efficiency and growth performance. - **Optimizing Low-Fat Diets:** Incorporating emulsifiers into low-fat broiler diets can markedly improve gut microbiota composition and bolster immune defenses in birds. - **Energy Substitution:** Emulsifiers offer a degree of energy substitution; for instance, adding 150 grams of emulsifier can partially replace 100 kcal of metabolizable energy in the diet.

2025-01-18

Surprise! Spraying rice plants with zinc oxide nanoparticles can help them withstand heatwaves and maintain yields.

Previous research has shown that heatwaves can reduce rice yields—and in extreme cases, even lead to plant death—depending on the severity of the heatwave. That’s why plant scientists have been actively exploring ways to help crops survive the increasing frequency and intensifying impact of heatwaves, driven by global warming. And now, a research team has discovered that zinc oxide nanoparticles may hold the key. Earlier studies also revealed that zinc oxide is a natural component of plant metabolism, which rice farmers have traditionally used for years as a fertilizer. However, recent findings suggest that applying zinc nanoparticles is an even more effective approach—since these tiny particles can penetrate directly through the pores on plant leaves. The team was eager to determine whether zinc oxide could also enable rice plants to maintain their productivity during heatwaves. To investigate, the researchers grew rice plants in climate-controlled greenhouses. Once the plants had matured, the team raised the temperature to 37°C for six consecutive days. During this artificially induced heatwave, they sprayed some of the plants with a solution containing zinc oxide nanoparticles, while others received only plain water. When the rice was harvested, the research team found that the plants treated with zinc oxide nanoparticles yielded significantly higher outputs compared to those watered normally. Moreover, closer analysis of the rice grains revealed that the treated plants also contained richer levels of essential nutrients.

2025-01-18

Approach tannic acid with a scientific mindset—understand it, and harness its benefits effectively.

The UV method (LY/T1642-2005, GB/T27985-2011) is suitable for gallic acid tannins, offering simple operation and rapid detection. However, the results can easily be affected by impurities, making it practical only when high accuracy isn’t strictly required. In contrast, HPLC-based methods for tannin analysis provide superior resolution and sensitivity in detecting impurities. Yet, as of now, there is no comprehensive national standard for this technique. When analyzing different tannin products, careful attention must be paid to selecting appropriate mobile phases, optimizing their ratios, controlling flow rates, and managing column temperatures. We know that tannins have a naturally astringent and bitter taste—even hydrolyzable tannins carry this unpleasant flavor, which can deter animals from consuming feed and even reduce the activity of digestive enzymes. This issue is closely tied to tannins’ strong affinity for proteins. That’s why we employ an encapsulation process to address these challenges. After encapsulating the tannins, direct analysis using the methods mentioned earlier becomes impossible. Instead, the samples must first undergo a pre-treatment step: boiling them in a water bath to dissolve the protective coating. Only after this initial treatment can the tannin content be accurately measured. The primary purpose of tannin encapsulation is to mask their bitter taste, preventing reduced feed intake in animals. Additionally, encapsulation helps minimize the contact between tannins and digestive enzymes, thereby preserving enzyme activity. This approach is further enhanced by ensuring the encapsulated tannins exhibit controlled-release properties. Specifically, slow and steady release within the digestive tract prevents the tannins from rapidly interacting with digestive enzymes, which could otherwise lead to a sharp decline in digestive efficiency.

2025-01-18