When we hear about amino acids, we usually think of proteins, the gym, or vitamin supplements. But the reality is that they are much more than that. They are fundamental building blocks for our body to function as it should.
However, not all amino acids are the same, nor do we obtain them in the same way. Therefore, in this blog post, we will discover the 9 essential amino acids, what they are, why we cannot live without them, and how to obtain them easily.
What are essential amino acids?
Amino acids are small molecules that, when joined together, form proteins, which are fundamental to keeping us healthy and energetic. Without them, almost no vital process would be possible. Among them are the so-called essential amino acids: those that our body cannot produce on its own. For this reason, we need to obtain them directly from our diet, through sources such as lean meats, eggs, legumes, or nuts.
Essential vs. non-essential amino acids: key difference
While all amino acids are necessary, there is a fundamental difference: we must obtain essential ones from food, whereas the body can produce non-essential ones by itself. That does not mean that the essential ones are not fundamental, but rather that, at the very least, we have a "Plan B" to produce them internally.
For example, glutamine or alanine are non-essential, and our body can generate them from other compounds. But if we talk about leucine or lysine, we do need to consume them because, without them, proteins simply do not form.
How many essential amino acids are there?
In total, experts recognize nine essential amino acids. No more, no less. Each one of them fulfills a specific role and, interestingly, they work as a team. It is not very useful to have an excess of one if the others are missing.
List of the 9 essential amino acids
1. Histidine
Histidine is key in the stages of growth and tissue repair. It also participates in the production of histamine, a substance that plays a role in the immune response and digestion.
It is also decisive for maintaining the myelin sheath, that kind of "protective cable" that covers the nerves. Without it, communication between nerve cells would not be as efficient.
2. Isoleucine
Isoleucine is responsible for, among other things, energy production. It is highly valued in the sports world because it helps with endurance and muscle repair after intense workouts. But it doesn't stop there. It also participates in blood sugar regulation and in the formation of hemoglobin, the protein that carries oxygen in the blood.
3. Leucine
Leucine is probably one of the most famous amino acids because it is closely linked to muscle growth. It directly stimulates protein synthesis, which is the building of new muscle tissue.
Additionally, it helps with recovery after exercise and wound healing, making it a great ally for both athletes and those recovering from surgeries or injuries.
4. Lysine
Lysine plays a crucial role in calcium absorption, therefore it is essential for bone health. Similarly, it is involved in the production of collagen and elastin, proteins that keep skin and tissues firm. And if that weren't enough, lysine helps in the production of antibodies, enzymes, and hormones.
5. Methionine
Methionine stands out for being rich in sulfur, an essential mineral for the health of skin, nails, and hair. Likewise, it acts as an antioxidant by helping with liver detoxification. It is also a precursor to other necessary molecules, such as cysteine and taurine, which fulfill vital functions in metabolism and the nervous system.
6. Phenylalanine
Phenylalanine is indispensable for producing neurotransmitters such as dopamine, norepinephrine, and adrenaline. Thanks to it, our brain and mood function as they should. At the same time, it is a precursor to tyrosine, another amino acid that participates in the production of thyroid hormones.
7. Threonine
Threonine contributes to maintaining digestive system health, as it is part of mucins, proteins that protect the intestinal walls. On the other hand, it participates in the formation of collagen and elastin, so it has a major role in skin and connective tissue health.
8. Tryptophan
Tryptophan is known for being the precursor to serotonin, the famous neurotransmitter that regulates mood, sleep, and appetite. Furthermore, it helps in the production of melatonin, the hormone that regulates the sleep cycle, making it key to resting well and maintaining a healthy biological rhythm.
9. Valine
And finally, valine, which is another amino acid very much linked to energy and physical performance. It helps in muscle repair and in the regulation of nitrogen levels in the body. It also intervenes in the maintenance of muscle coordination and balance, functions that we do not always relate to amino acids but that are essential in day-to-day life.
Functions of essential amino acids in the body
Muscle building and repair
One of the best-known functions of essential amino acids is their role in muscle protein synthesis. Without them, it would simply not be possible to build or maintain muscle mass. Besides, they actively participate in tissue repair after physical exertion or injuries.
Production of hormones and enzymes
The essential amino acids are also protagonists in the production of hormones and enzymes, those molecules that regulate practically everything in our body. From metabolism to mood, everything depends on them. For example, thanks to phenylalanine, we produce dopamine and adrenaline, which affect both mental performance and stress response.
Immune system support
Having a strong immune system depends largely on having essential amino acids in the proper amount. These are necessary for the formation of antibodies and defense cells. At the same time, they help reduce inflammation and improve the response to infections.
Other health benefits
Beyond muscles, hormones, and defenses, essential amino acids also influence the health of skin, hair, nails, and even wound healing. Similarly, they participate in the regulation of appetite, intellectual performance, mood, and sleep cycles. All this thanks to their role in the production of key neurotransmitters and hormones.
Where are essential amino acids found?
Food sources rich in essential amino acids
The best way to obtain essential amino acids is through diet. Meat, fish, eggs, and dairy products are complete sources, as they contain all the essential ones in good proportion.
However, if you follow a vegetarian or vegan diet, you can also obtain them by combining foods such as legumes, cereals, nuts, and seeds.
Natural supplements: when to take them?
Although the ideal is to get amino acids through food, there are times when natural supplements can be helpful. For example, during periods of intense training, injury recovery, or when the diet is not sufficient.
What happens if we don't get enough essential amino acids?
Consequences of a deficiency
Not meeting the requirements for essential amino acids can lead to serious problems. From constant fatigue and loss of muscle mass to weakening of the immune system and concentration problems. Even, in the long term, more serious complications can appear, such as growth retardation, difficulty in wound healing, or hormonal alterations.
How to ensure an adequate intake in your diet
Undoubtedly, the best strategy is to maintain a varied and balanced diet. Combining different types of proteins, both animal and vegetable, ensures that we get all the essential ones without difficulty. And in specific cases, having the support of natural food supplements can be a great help to cover daily requirements.
As you can see, essential amino acids are the very foundation of our health. Each of the nine fulfills primordial functions, and together they make it possible for our body to function optimally.
And in case you need the support of supplements, at Bechi Food Supplements you will find natural options to complement your diet and take care of your well-being every day. We invite you to visit our online store today!