The anti-stress root: what is ashwagandha and how does it normalize cortisol levels?

Stress is part of modern life and, in small doses, it is a natural and necessary response of the body. However, when it persists over time, it can become a disruptive factor that affects sleep, physical performance, recovery, and hormonal balance. One of the main drivers of these effects is cortisol, commonly known as the stress hormone.

In recent years, ashwagandha has attracted growing interest both within the scientific community and in the fields of nutrition and wellness. This traditionally used root has become one of the most studied natural ingredients to help the body better adapt to stress, supporting a physiological regulation of cortisol without aggressively interfering with the body’s natural processes.

But what exactly is ashwagandha?

Rather than acting as a stimulant or a sedative, ashwagandha stands out for its ability to restore balance by supporting the body’s response to situations of physical and mental demand. For this reason, it has become a common ally both for people with active lifestyles and for those looking to improve their sleep, recovery, and overall daily well-being in a sustainable way.

Ashwagandha: The ancient root of Ayurvedic medicine

Ashwagandha, whose scientific name is Withania somnifera, is a plant that has been used for more than 3,000 years in Ayurvedic medicine, the traditional health system originating in India. Within this tradition, it is considered one of the most valuable herbs due to its ability to strengthen the body and help it better adapt to the physical and mental demands of daily life.

In Ayurveda, ashwagandha is classified as an adaptogen, a category reserved for remedies designed to promote vitality, resilience to stress, and the overall balance of the body. Traditionally, it has been used to restore energy, promote mental calm, and support longevity, particularly during periods of fatigue, emotional overload, or prolonged effort.

This holistic approach — seeking balance rather than targeting a single symptom — is precisely what has attracted the interest of modern science. In recent years, numerous studies have analyzed the mechanisms of action of ashwagandha, confirming many of the benefits that Ayurvedic medicine had already attributed to this ancient root.

The ashwagandha plant: morphology and active compounds:

The ashwagandha plant grows in dry and warm regions, particularly in India, and as mentioned earlier, it has been used for centuries. It is a small shrub-like plant with several parts:

• Root: the most important part and the one primarily used in supplements.
• Leaves: green and soft.
• Small fruits: reddish in color when they ripen.

Although the entire plant contains beneficial compounds, the ashwagandha root is the part that concentrates the most active substances and the one that has been studied most extensively at a scientific level.

When we talk about the benefits of ashwagandha, we are actually referring to its withanolides, natural compounds present in the root that are responsible for how ashwagandha works. In simple terms, withanolides help the body to respond better to daily stress, maintain balanced cortisol levels, and support both physical and mental recovery.

What is it used for? Benefits supported by evidence

Now let’s look at what ashwagandha is used for. Today, it is used in different health and wellness contexts thanks to the effects observed in recent scientific studies. Beyond its traditional use, modern research has helped identify what ashwagandha is used for and in which situations it may be particularly helpful, always within an approach focused on balance and physiological support.

Below, we review the main uses of the ashwagandha plant and the benefits that have the strongest scientific support:

Stress and cortisol management:

The main benefit of ashwagandha lies in its ability to help balance cortisol levels, known as the stress hormone. Cortisol is necessary for the body, but when it remains elevated for long periods — due to work stress, lack of rest, intense training, or a demanding lifestyle — it can hinder recovery, affect sleep, and create a constant feeling of fatigue.

Ashwagandha works by helping the body regulate the stress response, rather than blocking it. This means that it:

• Helps prevent the body from staying in “alert mode” all day.
• Facilitates better recovery after physical and mental effort.
• Contributes to a greater sense of calm and balance.

For this reason, it is one of the most commonly used ingredients when the goal is to manage daily stress more effectively without causing sedation.

Improves physical performance and strength:

In addition to its effects on stress, ashwagandha has shown interesting benefits in the field of physical performance, especially among active individuals and athletes. Studies suggest that its use may contribute to:

• Improving endurance, helping sustain effort for longer periods.
• Increasing maximum oxygen consumption (VO₂ max), a key indicator of aerobic capacity.
• Supporting the development of muscle strength and power.

These effects can be partly explained by the fact that better stress and cortisol control allows the body to adapt more effectively to training, recover faster, and perform more efficiently.

Supports sleep quality and recovery:

Rest is one of the fundamental pillars of health and performance, and here ashwagandha also plays an important role. Thanks to its calming and nervous system-regulating effects, it may help to:

• Facilitate falling asleep.
• Reduce feelings of nervousness before bedtime.
• Improve night-time sleep quality.

Unlike other products, ashwagandha does not act as a sleeping pill, but rather as a regulator that helps the body relax naturally. This results in more restorative sleep and, consequently, better physical and mental recovery the following day.

How to choose the best ashwagandha

At this point, it is inevitable to ask the following question: which is the best ashwagandha?

The reality is that not all ashwagandha supplements on the market deliver the same results. Although many products use the same base ingredient, quality, concentration, and the type of extract make a clear difference in their effectiveness.

Knowing what to look for is key to choosing the best ashwagandha that truly works.

This guide will help you identify the most important criteria before buying:

The importance of withanolide concentration:

The most relevant factor when evaluating an ashwagandha supplement is its withanolide content, the active compounds responsible for its benefits. The potency of ashwagandha is measured by the percentage of withanolides, and a high-quality extract usually provides at least 5% withanolides.

Products that do not indicate this value may contain very low or inconsistent amounts, which reduces their effectiveness. For this reason, a well-formulated ashwagandha supplement should clearly state on its label the percentage of withanolides, ensuring a consistent and effective dose.

Patented extracts: what is the difference?:

Within the market, there are patented ashwagandha extracts that stand out because they have standardized extraction processes and their own clinical studies. The most well known are:

• KSM-66®: obtained exclusively from the ashwagandha root. It has been particularly studied in relation to physical performance, strength, and stress management in active individuals.
• Sensoril®: uses a combination of root and leaves. It is more commonly associated with managing intense stress and supporting sleep.

Both extracts have scientific support, but they are not interchangeable. The choice depends on the main goal: performance and physical activity, or stress management and sleep support.

In conclusion, ashwagandha is much more than a trend: it is a root with a long tradition and growing scientific support. Its value lies in helping the body restore balance in contexts of physical and mental stress, supporting the regulation of cortisol, performance, and sleep in a natural and sustainable way.

When integrated into a healthy routine, ashwagandha can become an effective ally for those seeking to take care of their well-being, improve recovery, and face daily life with greater stability and energy.