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Comparing Telotest from Fagron Genomics and TruDiagnostic: A Deep Dive into Biological Aging Techniques

15 Aug 2023 0 comments
Comparing Telotest from Fagron Genomics and TruDiagnostic: A Deep Dive into Biological Aging Techniques


In the quest to understand the intricacies of biological aging, two techniques have emerged as pivotal in assessing the biological alterations associated with aging: the evaluation of telomere length and the evaluation of DNA methylation. This article provides a comprehensive comparison of these techniques, shedding light on their mechanisms, advantages, and limitations.

Telomere Length Evaluation: qPCR vs. NGS


Telomeres are repetitive DNA sequences located at the ends of chromosomes. Their primary role is to protect our genetic data. As cells divide, these telomeres shorten, a process intrinsically linked to cellular aging.


  • qPCR (quantitative Polymerase Chain Reaction): This technique facilitates the comparative analysis of telomeric DNA versus non-telomeric DNA. It offers an average telomere length representation for the sample, providing a broad perspective on telomere length, which can be correlated with age.

  • NGS (Next-Generation Sequencing): NGS offers a more detailed analysis of individual telomere lengths across cells. While it's invaluable in research, it's less standardized and doesn't represent a mean value for individuals.


  • Quick and cost-effective, especially with qPCR.
  • Recognized in numerous studies as an indicator of biological aging and its association with age-related diseases.
  • A well-established correlation exists between telomere length and age across various tissues. Lifestyle changes can also influence this. For further insights, refer to recent studies: link1 and link2.


  • Provides only a partial view of biological aging.
  • Several unrelated factors can influence telomere length.

DNA Methylation Evaluation: The Power of Microarrays


DNA methylation involves the addition of a methyl group to DNA. As individuals age, these patterns change, acting as a "biological clock" that reflects an individual's biological age.


  • Microarrays: These pinpoint specific methylation patterns at designated genome sites. These patterns are then matched against databases to deduce an individual's biological age.


  • Offers a more comprehensive perspective on biological aging than merely assessing telomere length.


  • More resource-intensive and complex than qPCR.
  • Requires extensive databases, which are often not readily available, and intricate algorithms that are still in the validation phase.
  • No definitive research directly associates methylation with aging or age-related changes in human samples.
  • Methylation is more closely related to specific cellular events than to aging.

Conclusion: Harnessing the Power of Both Techniques

While each technique has its strengths in evaluating aging, telomere assessment has a more extensive literature foundation. An optimal approach might involve utilizing both techniques to provide a detailed and accurate representation of an individual's biological age. However, it's crucial to understand that telomere length and DNA methylation are just two of the many aging markers. A comprehensive understanding of biological aging may require exploring various markers and methods.

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