Summary: Wounds heal very slowly in older adults, and some never fully recover. But new studies show that taking certain amino acids over a long time may make a significant difference. They can speed healing and lower inflammation. They can also cut deaths and shorten hospital stays. There may be long-term health benefits too.
Healing is very slow in older adults. Many simply fail to recover from certain illnesses and medical treatments. So many older adults stay stuck in bed after surgery, injury and more. Many of them are already in poor health. An injury or a medical procedure makes things worse.
Even when older adults recover, it takes them a long time. But targeted nutrition can speed healing in older people.
More and more evidence shows that eating more of certain amino acids may boost healing, speed recovery and prevent muscle loss. Unlike proteins, amino acids are ready for the body to use right away. And amino acids are not just building blocks. They also act as signals in the body.
More of certain amino acids may boost the body’s building processes and tip the balance toward recovery. Some amino acids may also help make useful compounds. Arginine may boost nitric oxide (NO). Glutamine may help tune the immune system. Others may improve gut health and help the body make key proteins like collagen.
Making more collagen may help older adults most. Collagen is the most common protein in the human body. It plays a key role in skin, ligaments, tendons, connective tissue, muscle and even bone. All these tissues heal very slowly in older adults.
Which amino acids help wounds heal faster and build collagen?
There are many amino acids, but only about 22 are used to make proteins. Some of them are better at boosting collagen. These amino acids are not required to build collagen. But they may speed up the building processes by reprogramming the body’s cells. Science has found that arginine, β-hydroxy-β-methylbutyrate (HMB) and glutamine are especially good for wound healing.
Many clinical studies show this. In one, adults aged 70 years or older were given 14 g arginine, 3 g HMB, and 14 g glutamine (total nitrogen 3.59 g) in two split doses for a few days. Within a week, researchers found a significant rise in collagen production and faster wound healing.
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That is just one study. Many more show that arginine and glutamine are especially good at speeding wound healing and boosting the body’s building processes.
For example, one systematic review found that arginine and glutamine can help people with slow-healing wounds. They may even help with muscle loss and frailty that come with age. The researchers found that taking arginine and glutamine could lower inflammation and speed wound healing. It could also significantly cut deaths and even shorten hospital stays by 2.65 times. So yes, the benefits could be many and large. Interventional Pain Management St. Louis can also help older adults recover, with advanced treatments that fit these findings.
Figure 1 Stages of skin wound healing (Image source: Arribas-López, E., Zand, N., Ojo, O., Snowden, M. J., & Kochhar, T. (2021). The Effect of Amino Acids on Wound Healing: A Systematic Review and Meta-Analysis on Arginine and Glutamine. Nutrients, 13(8), 2498.)
Here is a key point. Healing is slow and takes a long time. It moves through different stages, and each stage needs different things. So taking arginine, glutamine and other amino acids must be a long-term effort. You may need to take more for several months to see real benefits.
Frequently asked questions
Why do wounds heal more slowly in older adults?
Healing is naturally slow in older adults, and some never fully recover after surgery or injury. Many are already in poor health. So an injury or a medical procedure sets them back further, and some stay stuck in bed. Collagen-rich tissues such as skin, tendons, ligaments, muscle and bone heal very slowly with age. Targeted nutrition, including certain amino acids, can speed the process.
Do arginine and glutamine help wounds heal?
Yes. A systematic review found that taking arginine and glutamine lowered inflammation, sped wound healing and significantly cut deaths. It also shortened hospital stays. The same review found these two amino acids may help with muscle loss and frailty that come with age. Arginine boosts nitric oxide, and glutamine helps tune the immune system. That is part of why they support repair.
How long should you take amino acids for wound healing?
Think in months, not days. Healing is a slow process that moves through several phases, and each phase has different needs. That means supplementing arginine, glutamine and other amino acids has to be a long-term effort. You may need to keep your intake higher for several months before the benefits become significant.
Can amino acids increase collagen in older adults?
Yes. In one clinical study, adults aged 70 or older were given a mix of arginine, HMB and glutamine in two split doses. Within a week, researchers measured a significant rise in collagen production and faster wound healing. Collagen is the most common protein in the body. It holds together skin, tendons, ligaments, connective tissue, muscle and bone.
Sources:
Arribas-López, E., Zand, N., Ojo, O., Snowden, M. J., & Kochhar, T. (2021). The Effect of Amino Acids on Wound Healing: A Systematic Review and Meta-Analysis on Arginine and Glutamine. Nutrients, 13(8), 2498. https://doi.org/10.3390/nu13082498
Williams, J. Z., Abumrad, N., & Barbul, A. (2002). Effect of a Specialized Amino Acid Mixture on Human Collagen Deposition. Annals of Surgery, 236(3), 369–375.
Dr. Gurpreet Singh Padda, MD, MBA, MHP
