In contemporary animal nutrition, antioxidants represent a vital component of health, performance, and production. Of all the natural antioxidants present, astaxanthin is amongst the most effective and powerful. Astaxanthin has been described as the "king of carotenoids" because it is a red-orange red natural pigment present in nature in microalgae, krill, shrimp, salmon, and certain sea animals. Increased antioxidant activities make it an important nutrient for animal feed, pet food, aquaculture, and livestock feed.
This article tells us about what astaxanthin is, why astaxanthin is so precious for animals' diets, and astaxanthin's advantages to animals' health and performance.
What Is Astaxanthin?
Astaxanthin is a carotenoid xanthophyll, which in natural conditions is produced by microalga Haematococcus pluvialis when it is subjected to environmental stress. Astaxanthin stands out among carotenoids owing to a specific molecular structure, which enables it to:
Neutralize reactive oxygen species (ROS) more efficiently.
Polarize cell membranes, providing protection to both the inner and outer layers.
Remain stable without being oxidized into pro-oxidants, compared to some synthetic antioxidants.
It is thus much more useful than other such popular antioxidants like vitamin E, vitamin C, and beta-carotene.
The Role of Antioxidants in Animal Nutrition
Oxidative stress is caused by an excess of free radicals in the body, which causes damage to cells, inflammation, weakened immunity, and reduced productivity of animals. Oxidative stress in farm animals can cause negative impacts on growth, reproduction, meat quality, and feed efficiency. Oxidative stress in companion animals causes aging, joint disease, and weakened immunity.
Antioxidants such as astaxanthin have a protective effect in the form of:
- Decreased inflammation.
- Enhanced immune response.
- Protection from oxidative cell, tissue, and organ injury.
- Facilitating disease and stress recovery.
Primary Advantages of Astaxanthin in Animal Feed
1. Supports Immune Function
Astaxanthin supports immune defense through enhanced antibody and immune cell production. Animals that consume astaxanthin are found to:
- Build up a higher resistance to disease.
- Exhibit improved recovery from disease.
- Require less synthetic antibiotics in aquaculture and animals.
Its immunomodulatory action makes it particularly desirable for use in intensive production systems where animals experience greater stress and are more likely to become diseased.
2. Growth Stimulation and Performance
Pig and poultry growth performance are crucial to profitability. Astaxanthin stimulates energy metabolism and feed intake through the protection of mitochondria from oxidative stress. Actions are:
- Pigs and birds fed diet supplemented with astaxanthin exhibit enhanced feed conversion ratio and weight gain.
- Fish and shrimp exhibit enhanced survival and growth in stressed aquaculture systems.
3. Maintains Reproductive Health
Oxidative stress is one of the major reasons for compromised fertility in breeding stock. Astaxanthin supplementation enhances by:
- Enhancing sperm quality and motility in male stock.
- Enhancing egg quality and hatchability in poultry.
- Maintaining reproductive hormone homeostasis.
This benefit has a direct bearing on enhanced breeding efficiency and healthier progeny.
4. Enhances Skin, Coat, and Egg Quality
Carotenoids like astaxanthin are natural pigments that cause deep coloring. In animals, this implies:
- Deepening of plumage in birds.
- Deeper yolk color and egg nutritional value.
- Richer skin and coat of companion animals.
More vivid flesh coloring in salmonids and shrimps, leading to better consumer acceptability.
5. Preserves Joint and Eye Health in Pets
As a joint and eye supplement in cats and dogs, the anti-inflammatory and antioxidant activity of astaxanthin:
- Decreases stiffness in joints and arthritic pain.
- Shield the eyes against oxidative damage and minimize risk of cataract and age-related degeneration.
- Maintain overall mobility and health in aging pets.
6. Aids Stress Resistance in Aquaculture
Stress due to poor water quality, crowding, or handling may compromise immunity and productivity in aquaculture. Astaxanthin aids in:
- Increased environmental stress tolerance.
- Lessened oxidative injury to gills and liver.
- Increased survival under transportation or disease conditions.
Astaxanthin Applications in Animal Nutrition
Chicken Feed
- Impacts egg yolk coloration and dietary value.
- Improves immunity and fertility function.
Aquatic Fish Culture
- Used for improving coloration of salmon, trout, and shrimp.
- Improve rate of survival and resistance to diseases.
Pet Food
- Is made into dog and cat supplements to support joint, skin, and eye health.
- Provides antioxidant defense protection to senior pets.
Livestock Farming
- Provides protection against infections to pigs, cattle, and sheep.
- Enhances meat quality and avoids oxidative spoilage.
Why Natural Astaxanthin Over Synthetic Ones?
Animal feed-derived astaxanthin can either be synthesized naturally by microalgae (Haematococcus pluvialis) or produced synthetically. Although cheap, synthetic forms contain fewer antioxidants and are less bioavailable. They are also less animal- and environmentally friendly for animal use in the long term.
Conclusion
Astaxanthin is merely an additive pigment-combined with some of the most powerful naturally occurring antioxidants on Earth, astaxanthin is utilized in enhancing animal health and nutrition. With reduced oxidative stress, optimized immune system, and increased growth and performance, astaxanthin allows animals to live better, healthier lives. As used in aquaculture, poultry, livestock, and pet food industries, astaxanthin is now a valuable resource for animal health as well as sustainable agriculture.
References
Ambati, R. R., Phang, S. M., Ravi, S., & Aswathanarayana, R. G. (2014). Astaxanthin: Sources, extraction, stability, biological activities and its commercial applications-A review. Marine Drugs, 12(1), 128–152. https://doi.org/10.3390/md12010128
Hussein, G., Sankawa, U., Goto, H., Matsumoto, K., & Watanabe, H. (2006). Astaxanthin, a carotenoid with potential in human health and nutrition. Journal of Natural Products, 69(3), 443–449. https://doi.org/10.1021/np050354
Kishimoto, Y., Yoshida, H., & Kondo, K. (2016). Potential anti-atherosclerotic properties of astaxanthin. Marine Drugs, 14(2), 35. https://doi.org/10.3390/md14020035
Li, J., Guo, C., Wu, J., & Xu, Y. (2019). Effects of dietary astaxanthin supplementation on growth, antioxidant capacity and immune response of broiler chickens. Poultry Science, 98(9), 4676–4683. https://doi.org/10.3382/ps/pez231
Naguib, Y. M. (2000). Antioxidant activities of astaxanthin and related carotenoids. Journal of Agricultural and Food Chemistry, 48(4), 1150–1154. https://doi.org/10.1021/jf991106k
Park, JS, Chyun, JH, Kim, YK, Line, LL, & Chew, BP (2010). Astaxanthin decreased oxidative stress and inflammation and enhanced immune response in humans. Nutrition & Metabolism, 7(1), 18. https://doi.org/10.1186/1743-7075-7-18
Rao, AR, Sindhuja, HN, Dharmesh, SM, Sankar, KU, Sarada, R., & Ravishankar, GA (2013). Effective inhibition of skin cancer, tyrosinase, and antioxidant properties by astaxanthin and astaxanthin esters from Haematococcus pluvialis. Journal of Agricultural and Food Chemistry, 61(16), 3842–3851. https://doi.org/10.1021/jf304609c
Tang, Y., Zhang, X., Zhao, J., Jin, H., & Liu, R. (2021). Dietary astaxanthin improves growth performance, antioxidant capacity, and intestinal health in fish: A review. Aquaculture Reports, 20, 100700. https://doi.org/10.1016/j.aqrep.2021.100700
