Cortisol (free)

Free Cortisol refers to the unbound, biologically active form of cortisol circulating in the body. Unlike total cortisol, which includes both bound and unbound hormone, free cortisol represents the fraction that is available to tissues and can directly influence stress response, metabolism, immune function, and energy levels. Measuring free cortisol provides a more accurate reflection of how the body is responding to physical and emotional stress. It is commonly assessed in urine or saliva samples and is particularly relevant in evaluating adrenal function and circadian rhythm imbalances.

No image found

Description

Who would benefit from testing their cortisol levels?

Individuals experiencing chronic stress, fatigue, anxiety, or symptoms of adrenal dysfunction would benefit from cortisol testing. It’s also helpful for those with irregular sleep patterns, weight changes, or ongoing health issues linked to stress.

What are symptoms of low or high cortisol levels?

High Cortisol:

    • Weight gain, especially in the abdomen
    • Insomnia
    • Anxiety and depression
    • High blood pressure
    • Muscle weakness

Low Cortisol:

    • Chronic fatigue
    • Muscle weakness
    • Weight loss
    • Low blood pressure
    • Mood swings
What is the difference between cortisol in saliva and blood?

Saliva testing for cortisol measures free, active hormone levels, reflecting the body’s immediate response to stress. Blood tests measure total cortisol, including both bound and unbound cortisol, giving a broader view of adrenal function over time.

Why measure cortisol several times during a day?

Cortisol levels fluctuate throughout the day, peaking in the morning and gradually declining. Measuring several times captures this natural rhythm, providing a more accurate assessment of adrenal function and stress response.

Tests containing this item

card-image

Adrenal Test

Lab Test

Saliva

119.99 USD

Add to cart
card-image

Cortisol Test

Lab Test

Saliva

69.99 USD

Add to cart
card-image

Men’s Hormone Test

Lab Test

Saliva

189.99 USD

Add to cart
card-image

Women’s Hormone Test

Lab Test

Saliva

159.99 USD

Add to cart
Content
Who would benefit from testing their cortisol levels?
What are symptoms of low or high cortisol levels?
What is the difference between cortisol in saliva and blood?
Why measure cortisol several times during a day?
Who would benefit from testing their cortisol levels?
What are symptoms of low or high cortisol levels?
What is the difference between cortisol in saliva and blood?
Why measure cortisol several times during a day?
girl-img