Frequently Asked Questions
What are the differences between all products?
Please refer to the product page. Choose a product based on your needs, considering purpose, interest in specific tests, hereditary disease testing, and testing cycle preferences.
What are the differences between Core and Code Youth?
Code Youth offers faster processing and focuses on capture sequencing, while the Core adds app access, micro-interpretation services, and different delivery options.
Number of items:
Both Core and Code Youth provide 12+ categories and 750+ reports.
After-sales service:
Both provide permanent free updates to reports.
What are the differences between Signature and Core?
Signature provides a deeper and more comprehensive analysis than the Core.
Number of items:
Signature includes 950+ items, with 200 high-precision tests.
Core includes 750+ items.
After-sales service:
Both include lifetime report updates.
What’s the difference between the Signature and Code Youth?
The Signature offers more comprehensive and precise testing compared to Code Youth.
Number of items:
Signature tests 950+ items, including 200 high-precision items.
Code Youth tests 750+ items.
Accuracy:
A higher data volume generally results in higher accuracy.
After-sales service:
Both include lifetime report updates.
The advantages of CodeYouth
• Comprehensive scan of 270,000 key methylation sites
• AI-driven analysis for accurate health profiling
• Large dataset support for reliability
• Suitable for multiple ethnic groups
• Painless home blood collection
• Raw data download available
• Developed by experienced research team with published SCI articles
How long do I need to wait for my result?
Results are available 4-6 weeks after sample receipt. Progress notifications are provided. Testing time may increase if adjustments to technology occur.
What testing technology does CodeYouth use?
CodeYouth uses Illumina’s MSA-48 chip, a high-quality and widely used microarray platform for methylation analysis.
What’s the difference between DNA testing and methylation testing?
DNA testing analyzes genetic sequences inherited from your parents, which are mostly fixed. Methylation testing analyzes epigenetic modifications, which are dynamic and influenced by lifestyle and environment. Think of DNA as the factory structure, while methylation acts as the management system controlling how the factory operates. While DNA cannot be changed, methylation patterns can be influenced to help reduce health risks and sub-health conditions.
What detection technology does CodeYouth use?
Microarray-based methylation detection (Illumina MSA chip) ensures high accuracy across 270,000 functional methylation sites related to aging, disease, and environment.
Can this test diagnose organ diseases at an early stage or young age?
Methylation testing assesses overall aging trends, not direct disease diagnosis. Organ methylation age may appear young even with localized disease. Results serve as reference alongside clinical tests
Understanding Abnormal Immune Function
Immune cell proportions are inferred from methylation patterns, not measured directly. Minor deviations are normal; clinical verification recommended if symptoms occur.
Why do my results feel different from my actual situation?
Methylation reflects historical exposures and biological effects, not just current behavior. Past lifestyle or environmental exposures may still influence results.
What is the accuracy of age detection?
Rigorous quality control ensures reproducibility and consistency. Correlation between methylation signals and replicates exceeds 0.98; probe detection rate >98%, ensuring reliable and scientifically valid data.
Does CodeYouth include telomere analysis?
Yes. Telomere length is estimated indirectly via DNA methylation and validated models, consistent with qPCR or FISH measurements.
What is the principle of genetic testing?
Human DNA contains ~3.16 billion base pairs. Variations (SNPs) impact heredity and health. Geno™ tests DNA from saliva/blood and compares SNPs with its database to generate reports. Methods include PCR, microarrays, exon sequencing, whole-genome sequencing.
How accurate is Signature compared to the Core?
Signature measures the entire genome, including exome (~2%), and interprets more loci than Core.
Does Signature include exome sequencing?
Yes, the exome is part of the genome, so it is included.
Can Signature detect chromosomal microdeletions?
Only thalassemia microdeletions are currently interpreted. Raw data download allows further analysis.
Cancer susceptibility genes – are they included?
Health risk section tests for susceptibility genes of specific diseases.
Are skin reports inaccurate?
Genetic factors are tested, but environment, diet, emotions, and sun exposure also affect results.
Whole genome sequencing is a sequencing technology.
Second-generation sequencing.
How long does it take to receive my test results?
Results are delivered within 4-6 weeks of receiving your sample.
Will my CodeYouth report be updated in the future?
Yes. If there are new and relevant scientific research developments, CodeYouth will continue to provide free report updates.
What do the blue dots in my report chart mean?
The blue dots represent the distribution of this indicator across a sample population of different ages. They allow you to see where you stand relative to others in the population.
How to combine multiple test reports?
Subsequent tests can be bound to prior samples for the same individual; different names prevent merging.
What samples does CodeYouth collect?
- 2–3 drops of blood via painless microneedle device.
- Collection takes ~60 seconds and can be done at home.
- Microneedles are not for children under 12, coagulation disorders, sensitive skin, or high altitudes (>2000m).
- Disposable lancets can be used instead.
Why is there liquid inside the blood collection tube?
The liquid is an anticoagulant, which prevents blood clotting and ensures sample quality.
This is normal and safe.
Where can I find instructions for CodeYouth sampling?
You can view the CodeYouth Sampling Instruction at the bottom of it’s product page.
Is Geno™ suitable for pregnant women?
Pregnancy causes significant hormonal and metabolic changes that may affect methylation results. For more accurate and meaningful data, it is recommended to take the test 3–6 months after delivery, when the body has returned closer to baseline.
Can CodeYouth detect cancer or a specific site?
The CodeYouth aging test is for healthy individuals and gives early biological warning signals but does not screen for specific diseases. It mainly studies how genome methylation affects aging and disease risk.
How often should I take the CodeYouth test?
It is recommended every 3–6 months to monitor aging trends.