If you have more than one test - add them one by one.
20 laboratory tests found
-
$119.00
Covered tests: Triiodothyronine (T3), Free (LabCorp)Covered components: Triiodothyronine,Free,Serum$31.00$33.00$55.00$119.00
Order from LifeExtension
Step 1: Add to cart - for each panel below click "Buy Online" button. This will open in a new tab. Click "Add to Cart" button there, and then close the tab.
- Click Buy Online then "Add to Cart" button in the new tab. Close the tab. (Tri-iodothyronine (T3) Free Blood Test $31.00)
- Click Buy Online then "Add to Cart" button in the new tab. Close the tab. (Estradiol Blood Test $33.00)
- Click Buy Online then "Add to Cart" button in the new tab. Close the tab. (Reverse T3 Blood Test $55.00)
Step 2: Checkout - go to Checkout and complete the checkout process there. Your total price should be $119.00 -
$123.00
Covered tests: Triiodothyronine (T3), Free (LabCorp)Covered components: Triiodothyronine,Free,Serum$31.00$33.00Covered tests: Reverse T3 (LabCorp)Covered components: Reverse T3, SerumBlacklisted States: MD, NJ, NY, RI$59.00$123.00
Order from HealthLabs
Step 1: Add to cart - for each panel below click "Buy Online" button. This will open in a new tab. Click "Add to Cart" button there, and then close the tab.
- Click Buy Online then "Add to Cart" button in the new tab. Close the tab. (Reverse T3 Test $59.00)
Step 2: Checkout - go to Checkout and complete the checkout process there. Your total price should be $59.00Order from LifeExtension
Step 1: Add to cart - for each panel below click "Buy Online" button. This will open in a new tab. Click "Add to Cart" button there, and then close the tab.
- Click Buy Online then "Add to Cart" button in the new tab. Close the tab. (Tri-iodothyronine (T3) Free Blood Test $31.00)
- Click Buy Online then "Add to Cart" button in the new tab. Close the tab. (Estradiol Blood Test $33.00)
Step 2: Checkout - go to Checkout and complete the checkout process there. Your total price should be $64.00 -
$132.00
Covered tests: Triiodothyronine (T3), Free (LabCorp)Covered components: Triiodothyronine,Free,Serum$31.00$33.00Covered tests: Reverse T3 (LabCorp)Covered components: Reverse T3, SerumBlacklisted States: NY, NJ, RI$68.00$132.00
Order from Walk-In Lab
Step 1: Add to cart - for each panel below click "Buy Online" button. This will open in a new tab. Click "Add to Cart" button there, and then close the tab.
- Click Buy Online then "Add to Cart" button in the new tab. Close the tab. (Reverse T3 Blood Test, LC/MS/MS $68.00)
Step 2: Checkout - go to Checkout and complete the checkout process there. Your total price should be $68.00Order from LifeExtension
Step 1: Add to cart - for each panel below click "Buy Online" button. This will open in a new tab. Click "Add to Cart" button there, and then close the tab.
- Click Buy Online then "Add to Cart" button in the new tab. Close the tab. (Tri-iodothyronine (T3) Free Blood Test $31.00)
- Click Buy Online then "Add to Cart" button in the new tab. Close the tab. (Estradiol Blood Test $33.00)
Step 2: Checkout - go to Checkout and complete the checkout process there. Your total price should be $64.00 -
$135.00
Covered tests: Triiodothyronine (T3), Free (LabCorp)Covered components: Triiodothyronine,Free,Serum$31.00$49.00$55.00$135.00
Order from RequestATest
Step 1: Add to cart - for each panel below click "Buy Online" button. This will open in a new tab. Click "Add to Cart" button there, and then close the tab.
- Click Buy Online then "Add to Cart" button in the new tab. Close the tab. (Estradiol Blood Test $49.00)
Step 2: Checkout - go to Checkout and complete the checkout process there. Your total price should be $49.00Order from LifeExtension
Step 1: Add to cart - for each panel below click "Buy Online" button. This will open in a new tab. Click "Add to Cart" button there, and then close the tab.
- Click Buy Online then "Add to Cart" button in the new tab. Close the tab. (Tri-iodothyronine (T3) Free Blood Test $31.00)
- Click Buy Online then "Add to Cart" button in the new tab. Close the tab. (Reverse T3 Blood Test $55.00)
Step 2: Checkout - go to Checkout and complete the checkout process there. Your total price should be $86.00 -
$137.99
$33.00Covered tests: Triiodothyronine (T3), Free (LabCorp)Covered components: Triiodothyronine,Free,SerumBlacklisted States: NY, NJ, RI$49.99$55.00$137.99
Order from LabReqs
Step 1: Add to cart - for each panel below click "Buy Online" button. This will open in a new tab. Click "Add to Cart" button there, and then close the tab.
- Click Buy Online then "Add to Cart" button in the new tab. Close the tab. (T3 Free Thyroid Test $49.99)
Step 2: Checkout - go to Checkout and complete the checkout process there. Your total price should be $49.99Order from LifeExtension
Step 1: Add to cart - for each panel below click "Buy Online" button. This will open in a new tab. Click "Add to Cart" button there, and then close the tab.
- Click Buy Online then "Add to Cart" button in the new tab. Close the tab. (Estradiol Blood Test $33.00)
- Click Buy Online then "Add to Cart" button in the new tab. Close the tab. (Reverse T3 Blood Test $55.00)
Step 2: Checkout - go to Checkout and complete the checkout process there. Your total price should be $88.00 -
$139.00
Covered tests: Triiodothyronine (T3), Free (LabCorp)Covered components: Triiodothyronine,Free,Serum$31.00$33.00Covered tests: Reverse T3 (LabCorp)Covered components: Reverse T3, SerumBlacklisted States: NY, NJ, RI$75.00$139.00
Order from RequestATest
Step 1: Add to cart - for each panel below click "Buy Online" button. This will open in a new tab. Click "Add to Cart" button there, and then close the tab.
- Click Buy Online then "Add to Cart" button in the new tab. Close the tab. (Reverse T3 Blood Test $75.00)
Step 2: Checkout - go to Checkout and complete the checkout process there. Your total price should be $75.00Order from LifeExtension
Step 1: Add to cart - for each panel below click "Buy Online" button. This will open in a new tab. Click "Add to Cart" button there, and then close the tab.
- Click Buy Online then "Add to Cart" button in the new tab. Close the tab. (Tri-iodothyronine (T3) Free Blood Test $31.00)
- Click Buy Online then "Add to Cart" button in the new tab. Close the tab. (Estradiol Blood Test $33.00)
Step 2: Checkout - go to Checkout and complete the checkout process there. Your total price should be $64.00 -
$142.00
Covered tests: Triiodothyronine (T3), Free (LabCorp)Covered components: Triiodothyronine,Free,Serum$31.00$33.00$78.00$142.00
Order from Private MD
Step 1: Add to cart - for each panel below click "Buy Online" button. This will open in a new tab. Click "Add to Cart" button there, and then close the tab.
- Click Buy Online then "Add to Cart" button in the new tab. Close the tab. (Reverse T3 $78.00)
Step 2: Checkout - go to Checkout and complete the checkout process there. Your total price should be $78.00Order from LifeExtension
Step 1: Add to cart - for each panel below click "Buy Online" button. This will open in a new tab. Click "Add to Cart" button there, and then close the tab.
- Click Buy Online then "Add to Cart" button in the new tab. Close the tab. (Tri-iodothyronine (T3) Free Blood Test $31.00)
- Click Buy Online then "Add to Cart" button in the new tab. Close the tab. (Estradiol Blood Test $33.00)
Step 2: Checkout - go to Checkout and complete the checkout process there. Your total price should be $64.00 -
$143.00
$33.00$55.00Covered tests: Triiodothyronine (T3), Free (LabCorp)
Extra tests (click to add to search): Thyroxine (T4), Free, Direct (LabCorp) ,
Covered components: Triiodothyronine,Free,SerumExtra components (click to add to search): T4,Free(Direct)$55.00$143.00
Order from LifeExtension
Step 1: Add to cart - for each panel below click "Buy Online" button. This will open in a new tab. Click "Add to Cart" button there, and then close the tab.
- Click Buy Online then "Add to Cart" button in the new tab. Close the tab. (Estradiol Blood Test $33.00)
- Click Buy Online then "Add to Cart" button in the new tab. Close the tab. (Reverse T3 Blood Test $55.00)
- Click Buy Online then "Add to Cart" button in the new tab. Close the tab. (Thyroid Add-On Panel Blood Test $55.00)
Step 2: Checkout - go to Checkout and complete the checkout process there. Your total price should be $143.00 -
$145.00
Covered tests: Triiodothyronine (T3), Free (LabCorp)Covered components: Triiodothyronine,Free,Serum$31.00$55.00$59.00$145.00
Order from Walk-In Lab
Step 1: Add to cart - for each panel below click "Buy Online" button. This will open in a new tab. Click "Add to Cart" button there, and then close the tab.
- Click Buy Online then "Add to Cart" button in the new tab. Close the tab. (Estradiol (E2) Blood Test $59.00)
Step 2: Checkout - go to Checkout and complete the checkout process there. Your total price should be $59.00Order from LifeExtension
Step 1: Add to cart - for each panel below click "Buy Online" button. This will open in a new tab. Click "Add to Cart" button there, and then close the tab.
- Click Buy Online then "Add to Cart" button in the new tab. Close the tab. (Tri-iodothyronine (T3) Free Blood Test $31.00)
- Click Buy Online then "Add to Cart" button in the new tab. Close the tab. (Reverse T3 Blood Test $55.00)
Step 2: Checkout - go to Checkout and complete the checkout process there. Your total price should be $86.00 -
$146.00
$33.00$55.00Covered tests: Triiodothyronine (T3), Free (LabCorp)Covered components: Triiodothyronine,Free,SerumBlacklisted States: NY, NJ, RI$58.00$146.00
Order from Walk-In Lab
Step 1: Add to cart - for each panel below click "Buy Online" button. This will open in a new tab. Click "Add to Cart" button there, and then close the tab.
- Click Buy Online then "Add to Cart" button in the new tab. Close the tab. (Tri-iodothyronine (T3) Free Serum Test $58.00)
Step 2: Checkout - go to Checkout and complete the checkout process there. Your total price should be $58.00Order from LifeExtension
Step 1: Add to cart - for each panel below click "Buy Online" button. This will open in a new tab. Click "Add to Cart" button there, and then close the tab.
- Click Buy Online then "Add to Cart" button in the new tab. Close the tab. (Estradiol Blood Test $33.00)
- Click Buy Online then "Add to Cart" button in the new tab. Close the tab. (Reverse T3 Blood Test $55.00)
Step 2: Checkout - go to Checkout and complete the checkout process there. Your total price should be $88.00 -
$290.00
Covered tests: Triiodothyronine (T3), Free (LabCorp)Covered components: Triiodothyronine,Free,SerumBlacklisted States: NJ, RI, NY$80.00$86.00Covered tests: Reverse T3 (LabCorp)Covered components: Reverse T3, SerumBlacklisted States: NJ, RI, NY$124.00$290.00
Order from Personalabs
Step 1: Add to cart - for each panel below click "Buy Online" button. This will open in a new tab. Click "Add to Cart" button there, and then close the tab.
- Click Buy Online then "Add to Cart" button in the new tab. Close the tab. (Triiodothyronine Free (T3, Free) Blood Test $80.00)
- Click Buy Online then "Add to Cart" button in the new tab. Close the tab. (Estradiol (E2) Blood Test $86.00)
- Click Buy Online then "Add to Cart" button in the new tab. Close the tab. (Reverse T3 Blood Test $124.00)
Step 2: Checkout - go to Checkout and complete the checkout process there. Your total price should be $290.00 -
$333.00
Covered tests: Triiodothyronine (T3), Free (LabCorp)Covered components: Triiodothyronine,Free,SerumBlacklisted States: NJ, RI, NY$80.00Covered tests: Reverse T3 (LabCorp)Covered components: Reverse T3, SerumBlacklisted States: NJ, RI, NY$124.00Covered tests: Estradiol (LabCorp) ,
Extra tests (click to add to search): Thyroid-stimulating Hormone (TSH) (LabCorp) , Follicle-stimulating Hormone (FSH) (LabCorp) , Lipid Panel With LDL:HDL Ratio (LabCorp)
Covered components: EstradiolExtra components (click to add to search): TSH, FSH, Cholesterol, Total, Triglycerides, HDL Cholesterol, VLDL Cholesterol Cal, LDL Cholesterol Calc, Comment:, LDL/HDL RatioBlacklisted States: NJ, RI, NY$129.00$333.00
Order from Personalabs
Step 1: Add to cart - for each panel below click "Buy Online" button. This will open in a new tab. Click "Add to Cart" button there, and then close the tab.
- Click Buy Online then "Add to Cart" button in the new tab. Close the tab. (Triiodothyronine Free (T3, Free) Blood Test $80.00)
- Click Buy Online then "Add to Cart" button in the new tab. Close the tab. (Reverse T3 Blood Test $124.00)
- Click Buy Online then "Add to Cart" button in the new tab. Close the tab. (Menopause Screening Profile Blood Test $129.00)
Step 2: Checkout - go to Checkout and complete the checkout process there. Your total price should be $333.00 -
$339.00
$86.00Covered tests: Reverse T3 (LabCorp)Covered components: Reverse T3, SerumBlacklisted States: NJ, RI, NY$124.00Covered tests: Triiodothyronine (T3), Free (LabCorp)
Extra tests (click to add to search): Thyroxine (T4), Free, Direct (LabCorp) , Thyroid-stimulating Hormone (TSH) (LabCorp) ,
Covered components: Triiodothyronine,Free,SerumBlacklisted States: NJ, RI, NY$129.00$339.00
Order from Personalabs
Step 1: Add to cart - for each panel below click "Buy Online" button. This will open in a new tab. Click "Add to Cart" button there, and then close the tab.
- Click Buy Online then "Add to Cart" button in the new tab. Close the tab. (Estradiol (E2) Blood Test $86.00)
- Click Buy Online then "Add to Cart" button in the new tab. Close the tab. (Reverse T3 Blood Test $124.00)
- Click Buy Online then "Add to Cart" button in the new tab. Close the tab. (Basic Thyroid Health Profile Blood Test $129.00)
Step 2: Checkout - go to Checkout and complete the checkout process there. Your total price should be $339.00 -
$343.00
$86.00Covered tests: Triiodothyronine (T3), Free (LabCorp) , Reverse T3 (LabCorp)
Extra tests (click to add to search): Thyroxine (T4) (LabCorp) , Thyroxine (T4), Free, Direct (LabCorp) , Triiodothyronine (T3) (LabCorp) , Thyroid-stimulating Hormone (TSH) (LabCorp) , Thyroid Peroxidase (TPO) Antibodies (LabCorp) ,
Covered components: Triiodothyronine,Free,Serum, Reverse T3, SerumExtra components (click to add to search): Thyroxine (T4), T4,Free(Direct), Triiodothyronine (T3), TSH, Thyroid Peroxidase (TPO) AbBlacklisted States: NJ, RI, NY$257.00$343.00
Order from Personalabs
Step 1: Add to cart - for each panel below click "Buy Online" button. This will open in a new tab. Click "Add to Cart" button there, and then close the tab.
- Click Buy Online then "Add to Cart" button in the new tab. Close the tab. (Estradiol (E2) Blood Test $86.00)
- Click Buy Online then "Add to Cart" button in the new tab. Close the tab. (Optimal Thyroid Health Profile Blood Test $257.00)
Step 2: Checkout - go to Checkout and complete the checkout process there. Your total price should be $343.00 -
$344.00
Covered tests: Triiodothyronine (T3), Free (LabCorp)Covered components: Triiodothyronine,Free,SerumBlacklisted States: NJ, RI, NY$80.00Covered tests: Reverse T3 (LabCorp)Covered components: Reverse T3, SerumBlacklisted States: NJ, RI, NY$124.00Covered tests: Estradiol (LabCorp)
Extra tests (click to add to search): Testosterone, Total (LabCorp) , Thyroid-stimulating Hormone (TSH) (LabCorp) , Follicle-stimulating Hormone (FSH) (LabCorp) ,
Covered components: EstradiolBlacklisted States: NJ, RI, NY$140.00$344.00
Order from Personalabs
Step 1: Add to cart - for each panel below click "Buy Online" button. This will open in a new tab. Click "Add to Cart" button there, and then close the tab.
- Click Buy Online then "Add to Cart" button in the new tab. Close the tab. (Triiodothyronine Free (T3, Free) Blood Test $80.00)
- Click Buy Online then "Add to Cart" button in the new tab. Close the tab. (Reverse T3 Blood Test $124.00)
- Click Buy Online then "Add to Cart" button in the new tab. Close the tab. (Basic Male Hormone Profile Blood Test $140.00)
Step 2: Checkout - go to Checkout and complete the checkout process there. Your total price should be $344.00 -
$382.00
Covered tests: Reverse T3 (LabCorp)Covered components: Reverse T3, SerumBlacklisted States: NJ, RI, NY$124.00Covered tests: Triiodothyronine (T3), Free (LabCorp)
Extra tests (click to add to search): Thyroxine (T4), Free, Direct (LabCorp) , Thyroid-stimulating Hormone (TSH) (LabCorp) ,
Covered components: Triiodothyronine,Free,SerumBlacklisted States: NJ, RI, NY$129.00Covered tests: Estradiol (LabCorp) ,
Extra tests (click to add to search): Thyroid-stimulating Hormone (TSH) (LabCorp) , Follicle-stimulating Hormone (FSH) (LabCorp) , Lipid Panel With LDL:HDL Ratio (LabCorp)
Covered components: EstradiolExtra components (click to add to search): TSH, FSH, Cholesterol, Total, Triglycerides, HDL Cholesterol, VLDL Cholesterol Cal, LDL Cholesterol Calc, Comment:, LDL/HDL RatioBlacklisted States: NJ, RI, NY$129.00$382.00
Order from Personalabs
Step 1: Add to cart - for each panel below click "Buy Online" button. This will open in a new tab. Click "Add to Cart" button there, and then close the tab.
- Click Buy Online then "Add to Cart" button in the new tab. Close the tab. (Reverse T3 Blood Test $124.00)
- Click Buy Online then "Add to Cart" button in the new tab. Close the tab. (Basic Thyroid Health Profile Blood Test $129.00)
- Click Buy Online then "Add to Cart" button in the new tab. Close the tab. (Menopause Screening Profile Blood Test $129.00)
Step 2: Checkout - go to Checkout and complete the checkout process there. Your total price should be $382.00 -
$385.00
Covered tests: Triiodothyronine (T3), Free (LabCorp)Covered components: Triiodothyronine,Free,SerumBlacklisted States: NJ, RI, NY$80.00Covered tests: Reverse T3 (LabCorp)Covered components: Reverse T3, SerumBlacklisted States: NJ, RI, NY$124.00Covered tests: Estradiol (LabCorp) ,
Extra tests (click to add to search): Thyroid Profile With TSH (LabCorp) , Follicle-stimulating Hormone (FSH) and Luteinizing Hormone (LH) (LabCorp) , Testosterone, Total, Women, Children, and Hypogonadal Males, LC/MS-MS (LabCorp)
Covered components: EstradiolExtra components (click to add to search): TSH, Thyroxine (T4), T3 Uptake, Free Thyroxine Index, LH, FSH, Testosterone, Total, LC/MSBlacklisted States: NJ, RI, NY$181.00$385.00
Order from Personalabs
Step 1: Add to cart - for each panel below click "Buy Online" button. This will open in a new tab. Click "Add to Cart" button there, and then close the tab.
- Click Buy Online then "Add to Cart" button in the new tab. Close the tab. (Triiodothyronine Free (T3, Free) Blood Test $80.00)
- Click Buy Online then "Add to Cart" button in the new tab. Close the tab. (Reverse T3 Blood Test $124.00)
- Click Buy Online then "Add to Cart" button in the new tab. Close the tab. (Basic Female Hormone Profile Blood Test $181.00)
Step 2: Checkout - go to Checkout and complete the checkout process there. Your total price should be $385.00 -
$386.00
Covered tests: Estradiol (LabCorp) ,
Extra tests (click to add to search): Thyroid-stimulating Hormone (TSH) (LabCorp) , Follicle-stimulating Hormone (FSH) (LabCorp) , Lipid Panel With LDL:HDL Ratio (LabCorp)
Covered components: EstradiolExtra components (click to add to search): TSH, FSH, Cholesterol, Total, Triglycerides, HDL Cholesterol, VLDL Cholesterol Cal, LDL Cholesterol Calc, Comment:, LDL/HDL RatioBlacklisted States: NJ, RI, NY$129.00Covered tests: Triiodothyronine (T3), Free (LabCorp) , Reverse T3 (LabCorp)
Extra tests (click to add to search): Thyroxine (T4) (LabCorp) , Thyroxine (T4), Free, Direct (LabCorp) , Triiodothyronine (T3) (LabCorp) , Thyroid-stimulating Hormone (TSH) (LabCorp) , Thyroid Peroxidase (TPO) Antibodies (LabCorp) ,
Covered components: Triiodothyronine,Free,Serum, Reverse T3, SerumExtra components (click to add to search): Thyroxine (T4), T4,Free(Direct), Triiodothyronine (T3), TSH, Thyroid Peroxidase (TPO) AbBlacklisted States: NJ, RI, NY$257.00$386.00
Order from Personalabs
Step 1: Add to cart - for each panel below click "Buy Online" button. This will open in a new tab. Click "Add to Cart" button there, and then close the tab.
- Click Buy Online then "Add to Cart" button in the new tab. Close the tab. (Menopause Screening Profile Blood Test $129.00)
- Click Buy Online then "Add to Cart" button in the new tab. Close the tab. (Optimal Thyroid Health Profile Blood Test $257.00)
Step 2: Checkout - go to Checkout and complete the checkout process there. Your total price should be $386.00 -
$393.00
Covered tests: Reverse T3 (LabCorp)Covered components: Reverse T3, SerumBlacklisted States: NJ, RI, NY$124.00Covered tests: Triiodothyronine (T3), Free (LabCorp)
Extra tests (click to add to search): Thyroxine (T4), Free, Direct (LabCorp) , Thyroid-stimulating Hormone (TSH) (LabCorp) ,
Covered components: Triiodothyronine,Free,SerumBlacklisted States: NJ, RI, NY$129.00Covered tests: Estradiol (LabCorp)
Extra tests (click to add to search): Testosterone, Total (LabCorp) , Thyroid-stimulating Hormone (TSH) (LabCorp) , Follicle-stimulating Hormone (FSH) (LabCorp) ,
Covered components: EstradiolBlacklisted States: NJ, RI, NY$140.00$393.00
Order from Personalabs
Step 1: Add to cart - for each panel below click "Buy Online" button. This will open in a new tab. Click "Add to Cart" button there, and then close the tab.
- Click Buy Online then "Add to Cart" button in the new tab. Close the tab. (Reverse T3 Blood Test $124.00)
- Click Buy Online then "Add to Cart" button in the new tab. Close the tab. (Basic Thyroid Health Profile Blood Test $129.00)
- Click Buy Online then "Add to Cart" button in the new tab. Close the tab. (Basic Male Hormone Profile Blood Test $140.00)
Step 2: Checkout - go to Checkout and complete the checkout process there. Your total price should be $393.00 -
$397.00
Covered tests: Estradiol (LabCorp)
Extra tests (click to add to search): Testosterone, Total (LabCorp) , Thyroid-stimulating Hormone (TSH) (LabCorp) , Follicle-stimulating Hormone (FSH) (LabCorp) ,
Covered components: EstradiolBlacklisted States: NJ, RI, NY$140.00Covered tests: Triiodothyronine (T3), Free (LabCorp) , Reverse T3 (LabCorp)
Extra tests (click to add to search): Thyroxine (T4) (LabCorp) , Thyroxine (T4), Free, Direct (LabCorp) , Triiodothyronine (T3) (LabCorp) , Thyroid-stimulating Hormone (TSH) (LabCorp) , Thyroid Peroxidase (TPO) Antibodies (LabCorp) ,
Covered components: Triiodothyronine,Free,Serum, Reverse T3, SerumExtra components (click to add to search): Thyroxine (T4), T4,Free(Direct), Triiodothyronine (T3), TSH, Thyroid Peroxidase (TPO) AbBlacklisted States: NJ, RI, NY$257.00$397.00
Order from Personalabs
Step 1: Add to cart - for each panel below click "Buy Online" button. This will open in a new tab. Click "Add to Cart" button there, and then close the tab.
- Click Buy Online then "Add to Cart" button in the new tab. Close the tab. (Basic Male Hormone Profile Blood Test $140.00)
- Click Buy Online then "Add to Cart" button in the new tab. Close the tab. (Optimal Thyroid Health Profile Blood Test $257.00)
Step 2: Checkout - go to Checkout and complete the checkout process there. Your total price should be $397.00
Understanding of Lab Tests Results
Please visit the site associated with The American Association for Clinical Chemistry (AACC) for better understanding of tests. There you will find the most detailed and full information regarding lab tests. In "common questions" tab you will find answers on the most common questions.
In addition, you can use a special form to ask the question. It is useful, if there is no answer on your question on the web site. A laboratory scientist will answer your question. It is a part of voluntary service provided by the American Society for Clinical Laboratory Science.