Medical Disclaimer: This article is for educational purposes only and does not constitute medical advice. Genetic variants discussed here are statistical associations, not diagnoses. Always consult a qualified healthcare provider before making any health decisions based on genetic data.
Introduction: Three Tools, Very Different Approaches
When you download your raw DNA file from 23andMe, AncestryDNA, or MyHeritage, the next question is almost always the same: what do I do with it now? Three names come up repeatedly in forums, Reddit threads, and blog comments — SelfDecode, Promethease, and Genetic Genie. Each one promises to help you understand your genome, but they approach that goal in fundamentally different ways.
SelfDecode is a commercial subscription platform with polished reports, an AI assistant, and supplement recommendations. Promethease is a literature-mining engine that returns dense, raw scientific associations for every notable variant in your genome. Genetic Genie is a free, narrowly focused tool that looks specifically at methylation and detoxification pathways. These are not three versions of the same thing — they occupy different niches, serve different users, and have different limitations.
This article walks through each tool in depth: what it actually does, what the reports look like, where the science is strong and where it gets speculative, and what it costs. We also compare them side-by-side on the dimensions that matter most for someone trying to make sense of their DNA. Finally, we look at newer, conversation-based tools like AskMyDNA that take a different approach entirely.
If you are still deciding what to do with your raw data, the companion guide to best DNA upload sites in 2026 covers the broader landscape. For background on Promethease specifically, how to read a Promethease report is worth reading before diving into the comparison below.
What SelfDecode Actually Does
SelfDecode is a subscription-based platform founded in 2016, headquartered in the US. It accepts raw DNA files from most major testing companies (23andMe, AncestryDNA, MyHeritage, FamilyTreeDNA, Dante Labs, Nebula Genomics) and returns structured health reports organized around wellness categories: cognitive function, hormones, inflammation, cardiovascular health, autoimmune risk, sleep, mood, and more.
How the reports work. Each report covers a specific trait or condition. SelfDecode aggregates hundreds or thousands of genetic variants associated with that trait — not just one or two headline SNPs, but polygenic scores built from the scientific literature. For example, a cortisol or stress report might incorporate variants in FKBP5 (rs1360780), CRHR1, and NR3C1, weighted and combined into an overall risk score. This polygenic approach is more methodologically sophisticated than looking at a single SNP in isolation.
AI-generated summaries. Reports include plain-language summaries written (or at minimum structured) with AI assistance. These explain what your specific combination of variants means, what lifestyle factors are relevant, and what interventions have evidence support. The writing is accessible, which is a genuine advantage for non-scientists.
Supplement and lifestyle recommendations. SelfDecode connects variants to actionable suggestions — specific nutrients, supplements, or habits that may be relevant given your genetic profile. For instance, if you carry the MTHFR C677T variant (rs1801133), the report may recommend methylfolate over folic acid. These recommendations vary in quality. Some are well-grounded in clinical literature; others are more speculative extrapolations from basic science.
Lab interpretation. A feature that distinguishes SelfDecode from the other two tools is its ability to integrate lab results. You can upload blood test data alongside your genome and receive an interpretation that considers both. This is a meaningful clinical enhancement — genetics tells you predispositions, labs tell you current status.
What SelfDecode does not do. It does not provide a raw variant dump. You see curated reports, not every SNP in your file. If you want to dig into a specific variant like rs4680 (COMT) or rs53576 (OXTR) and read the underlying research yourself, SelfDecode's interface is not designed for that. It is built for guided discovery, not open-ended exploration.
Pricing. SelfDecode operates on a subscription model. As of 2025, the basic plan starts around $97/year for DNA reports alone; premium tiers including the lab interpretation feature and additional reports run higher. There is no meaningful free tier — a trial gives access to a limited number of reports before requiring payment.
For users who specifically want an alternative to SelfDecode, the selfdecode alternative 2026 guide covers the field in more detail.
What Promethease Actually Does
Promethease was built in 2008 by Mike Cariaso and Greg Lennon and was acquired by MyHeritage in 2019. It operates on a single, powerful idea: take every genotyped position in your raw DNA file, cross-reference it against SNPedia (a community-maintained wiki of genetic research), and return a complete report of every variant with documented health associations.
The report structure. A Promethease report is not a curated narrative. It is a database query result. You get a list of thousands of entries, each representing one SNP in your genome that has a documented association. Each entry shows your genotype, a "magnitude" score (0–10, reflecting how significant or surprising the finding is), a "good/bad" indicator, and a link to the SNPedia article with source studies.
The report is filterable and searchable. You can sort by magnitude to see your most significant variants first, filter by condition (e.g., "Alzheimer's," "cancer," "metabolism"), or look up a specific rs number. This flexibility is genuinely powerful for researchers and medically sophisticated users.
The SNPedia foundation. SNPedia is the underlying data source. It is a wiki — meaning entries are written and updated by volunteers, quality varies, and some articles are far better-sourced than others. Highly studied variants like APOE e4 (rs429358, rs7412), BRCA1/2, and MTHFR have rich, well-referenced entries. Less studied variants may have single-study citations from small cohorts, some of which have not replicated. Promethease presents all of these at face value; it does not weight by study quality.
What Promethease does well. Volume and transparency. If you want to know whether your genome contains a specific variant — any variant with a SNPedia entry — Promethease will tell you. The raw scientific links let you verify claims directly against PubMed. For someone willing to do the interpretive work themselves, no other consumer tool provides this level of access.
What Promethease does not do. It does not explain what your findings mean in context. If you have 40 "bad" variants and 80 "good" ones, Promethease does not synthesize that into a coherent picture of your health. It also does not account for penetrance, gene-gene interactions, or lifestyle modifiers. Two people with the same APOE e4 genotype may have very different actual risk profiles depending on dozens of other factors — Promethease treats them identically.
Reading a report takes effort. For most users, a raw Promethease report is overwhelming. Thousands of entries, medical jargon, conflicting findings, variants of uncertain significance mixed with clinically established ones. Without a background in genetics or medicine, interpretation is difficult. The how to read a Promethease report guide addresses exactly this challenge.
Pricing. Promethease charges a one-time fee per report — currently $12. This is the most cost-effective option for a comprehensive variant lookup. Reports are generated within minutes and can be downloaded for offline use.
What Genetic Genie Actually Does
Genetic Genie is the most narrowly focused of the three tools, and also the most accessible — it is entirely free. It was built specifically to analyze two sets of variants: methylation cycle genes and detoxification genes. If those topics sound unfamiliar, that context matters for evaluating the tool.
Methylation panel. The methylation report covers a curated set of roughly 30 SNPs in genes involved in the one-carbon metabolism pathway. Key genes include MTHFR (rs1801133, rs1801131), MTRR (rs1801394), MTR (rs1805087), COMT (rs4680), MAO-A (rs6323), BHMT (rs3733890), CBS (rs234706), and several others. Each variant is shown as homozygous normal, heterozygous, or homozygous variant, color-coded for quick scanning.
This is exactly the information that functional medicine practitioners and naturopaths often request when working with patients who have chronic fatigue, mood disorders, or other conditions thought to involve methylation dysfunction. The report format matches what those practitioners are used to seeing.
Detoxification panel. The detox report focuses on genes involved in phase I and phase II liver detoxification, including cytochrome P450 enzymes (CYP1A1, CYP1B1, CYP2D6, CYP3A4), glutathione transferases (GSTM1, GSTT1, GSTP1), and NAT2. Some of these variants affect drug metabolism — CYP2D6 variants, for instance, are clinically relevant for how patients metabolize a long list of medications.
The scientific context caveat. Genetic Genie does not interpret the variants it shows. It lists them. The interpretation — what a compound heterozygous MTHFR means in practice, or whether a COMT val158met genotype requires any intervention — is left entirely to the user or their practitioner. This is appropriate, because the science here is genuinely complex and contested.
The "methylation protocol" world, popularized by practitioners like Ben Lynch, involves specific nutrient combinations based on these variant patterns. Some of this is grounded in solid biochemistry; some extrapolates far beyond current evidence. Genetic Genie presents the variants; it does not endorse any particular protocol.
Coverage limitation. Because Genetic Genie focuses on a defined set of 30-odd variants, it only works if your raw DNA file was genotyped on an array that includes those positions. 23andMe v4 and v5 files work well. Some other platforms may have gaps in coverage for specific variants.
Cost. Free, with an optional donation. No account required. Upload the raw file, get the report in seconds.
For a deep dive specifically on MTHFR — one of the most commonly discussed methylation variants — see MTHFR gene: how to check your raw data.
Side-by-Side Feature Comparison
The following table summarizes how the three tools compare across dimensions that matter for practical use:
| Feature | SelfDecode | Promethease | Genetic Genie |
|---|---|---|---|
| Price | ~$97–$199/year | $12 one-time | Free |
| Report format | Curated health reports | Full SNP database dump | Focused variant table |
| Scope | 100+ health categories | Everything in SNPedia | Methylation + detox only |
| Polygenic scoring | Yes | No | No |
| Raw variant access | Limited | Full | Full (narrow scope) |
| AI / plain language | Yes | No | No |
| Lab integration | Yes (premium) | No | No |
| Interpretation depth | High (AI-assisted) | None (user interprets) | None (user interprets) |
| Source citations | Partial | Full PubMed links | None |
| Ease of use | High | Low–Medium | High |
| Requires subscription | Yes | No | No |
| Download raw report | Limited | Yes | Yes |
| Clinical SNPs (BRCA, APOE) | Yes | Yes | No |
| Drug metabolism variants | Partial | Yes | Yes (detox panel) |
| Methylation panel | Partial (in reports) | Via search | Full dedicated panel |
A second comparison focuses on the types of users each tool serves best:
| User type | Best tool | Why |
|---|---|---|
| Non-scientist wanting guided insights | SelfDecode | Plain language, organized reports |
| Researcher wanting all variant data | Promethease | Complete SNPedia cross-reference |
| Functional medicine patient | Genetic Genie | Methylation panel matches practitioner needs |
| Someone on multiple medications | Promethease or SelfDecode | Drug metabolism SNPs (CYP2D6, CYP2C19) |
| Budget-conscious user | Genetic Genie (free) or Promethease ($12) | No subscription required |
| User wanting conversation-based Q&A | AskMyDNA | Chat interface for specific questions |
Scientific Validity: What the Evidence Actually Supports
Evaluating these tools requires separating three different types of genetic associations that often get conflated in consumer genomics:
Clinically validated variants. A small number of genetic variants have strong, replicated, clinically actionable associations. BRCA1 and BRCA2 pathogenic variants substantially increase breast and ovarian cancer risk — this is established by large prospective studies and validated in clinical practice. APOE e4 (rs429358 + rs7412 combination) is a significant risk factor for late-onset Alzheimer's disease. Factor V Leiden (rs6025) increases venous thromboembolism risk meaningfully. These associations hold up across populations and study designs. All three tools cover some of these.
Moderate-evidence polygenic associations. Many health traits — cardiovascular disease risk, type 2 diabetes susceptibility, body weight — are influenced by hundreds of variants, each with tiny individual effects. Polygenic risk scores for these conditions are scientifically valid in population studies but have limited predictive value for any individual. SelfDecode builds these composite scores; Promethease lists the individual variants without combining them. Neither approach is wrong; they just answer different questions.
Functional medicine and nutrigenomic associations. This is the most contested territory. Claims like "compound heterozygous MTHFR C677T/A1298C requires methylfolate supplementation" or "COMT val/val genotype means you need lower dopamine-stimulating substances" are common in the functional medicine space. Some have plausible biochemical mechanisms; many lack rigorous clinical trial evidence. Genetic Genie and parts of SelfDecode operate in this space. Users should be aware that these recommendations often outrun the evidence base.
A useful benchmark: the NIH's ClinVar database classifies variants by clinical significance using a standardized review process. Checking any specific variant there gives a more rigorous evidence evaluation than any consumer tool provides.
Privacy and Data Handling
Uploading your raw DNA file to a third-party service is a significant privacy decision. Your genetic data is uniquely identifying and permanently sensitive — it cannot be changed if compromised.
SelfDecode states that it does not sell user data and uses encryption at rest and in transit. Users can delete their data. The company is US-based, subject to HIPAA considerations, though consumer genomic companies occupy an uncertain regulatory space.
Promethease / MyHeritage — since the MyHeritage acquisition in 2019, Promethease reports are generated through MyHeritage infrastructure. MyHeritage has faced past data breach incidents (2018, affecting email addresses). They publish a privacy policy covering genetic data specifically. Reports are not stored permanently by default; users download them.
Genetic Genie is a minimal operation. The site's privacy policy is sparse. Given that it processes your raw DNA file, users should review what data is retained. The narrow scope (a few dozen variants analyzed) means relatively little information is extracted compared to a full analysis.
General principle: Never upload raw DNA to a service you do not understand. Read the terms of service, specifically the sections on data sharing, research use, and deletion rights. The 23andMe raw data guide covers the implications of the 23andMe bankruptcy for user data specifically, which illustrates how circumstances can change.
Practical Walkthrough: The Same Question in Each Tool
To make the comparison concrete, consider a user who wants to understand their genetic risk factors related to cardiovascular health — specifically, homocysteine metabolism and related variants.
In Promethease: The user searches for "homocysteine" or looks up rs1801133 (MTHFR C677T) directly. The report returns their genotype (e.g., CT heterozygous), links to SNPedia's article on MTHFR, and shows associated studies. The user also finds rs1805087 (MTR A2756G), rs1801394 (MTRR A66G), and rs1801131 (MTHFR A1298C) if they know to look for them. The information is there; finding and connecting it requires initiative.
In SelfDecode: There is likely a cardiovascular or heart health report, and possibly a separate methylation or homocysteine report. The user opens it and receives a summary that aggregates their relevant variants, explains the combined implication, and suggests dietary choices (B vitamins, folate sources) backed by inline citations. The experience is faster and more accessible.
In Genetic Genie: The user uploads the file and immediately receives a color-coded methylation panel showing their exact genotype for MTHFR C677T, MTHFR A1298C, and eight or ten related variants. There is no interpretation, but a functional medicine practitioner can read this chart at a glance. The user can take this printout to an appointment.
With AskMyDNA: A user who has uploaded their genome can ask specific questions in natural language: "Do I have the MTHFR C677T variant and what does that mean for folate metabolism?" The system retrieves the actual genotype from the file and explains the finding conversationally, including relevant caveats. This approach is useful for users who want to explore their data interactively rather than read through pre-built reports. You can try 3 free questions with no credit card required at AskMyDNA.
Limitations Shared by All Three Tools
Despite their differences, SelfDecode, Promethease, and Genetic Genie share several limitations that users should understand before drawing conclusions from their reports.
Genotyping arrays miss most variants. Consumer DNA tests genotype roughly 600,000–700,000 positions out of approximately 3 billion base pairs in the human genome. Variants not included on the array are simply absent from your raw data. A negative result for a specific variant (e.g., a BRCA1 pathogenic variant) does not mean you do not carry any BRCA1 variants — it means you do not carry the ones the array tests for. Clinical genetic testing, which sequences specific genes completely, is required for medical-grade answers.
Population-specific validity. Most genome-wide association studies have been conducted predominantly in European-ancestry populations. Risk scores and variant associations derived from these studies may have reduced accuracy or different interpretations in individuals of African, Asian, Latin American, or admixed ancestry. All three tools largely reflect this research gap.
Gene-environment interaction. Genetic predisposition is not destiny. A person with multiple cardiovascular risk variants who exercises regularly, maintains a healthy weight, and does not smoke has a different actual risk profile than the genetic data alone suggests. None of these tools model lifestyle factors adequately.
Incidental findings and psychological impact. Learning you carry an APOE e4/e4 genotype, or a BRCA variant of uncertain significance, without appropriate genetic counseling context can be distressing and difficult to interpret correctly. The American Society of Human Genetics and the ACMG both recommend professional genetic counseling for certain categories of findings. See the ACMG guidelines and NIH genetic testing resources for more context.
For users who want to understand what genetic analysis can and cannot tell them, free DNA health analysis: what you're missing addresses the broader picture.
Frequently Asked Questions
Is Promethease still worth using after the MyHeritage acquisition?
Yes, for its core use case. Promethease remains the most comprehensive consumer tool for cross-referencing your raw DNA against published research. The acquisition by MyHeritage in 2019 changed the corporate ownership but did not fundamentally alter the report format or the underlying SNPedia data source. At $12 per report, it remains the best value for users who want full variant coverage and are comfortable doing their own interpretation. The main thing to evaluate is the privacy implications of MyHeritage's data handling, which you should review before uploading.
Can Genetic Genie tell me if I need methylfolate instead of folic acid?
Genetic Genie can tell you your MTHFR C677T and A1298C genotypes, which are the variants most commonly cited in discussions of folate metabolism. However, it cannot and does not make supplement recommendations. Whether those genotypes warrant methylfolate supplementation — and at what dose — depends on your actual folate and homocysteine levels, your diet, and clinical assessment. The genetics provide context; they are not a prescription.
Does SelfDecode cover BRCA1 and BRCA2 variants?
SelfDecode does include cancer predisposition in its report categories and covers some BRCA1/2 variants. However, consumer genotyping arrays do not sequence BRCA1/2 completely. They test for a limited set of known pathogenic variants. A negative result from SelfDecode (or any consumer tool) for BRCA1/2 does not rule out hereditary breast cancer risk. If you have a strong family history of breast, ovarian, or related cancers, clinical genetic testing with full gene sequencing is the appropriate next step.
What is the best tool if I just want to know about my drug metabolism?
For pharmacogenomics — how your variants in CYP2D6, CYP2C19, CYP2C9, SLCO1B1, and related genes affect drug metabolism — Promethease covers these variants comprehensively via SNPedia entries, and Genetic Genie's detox panel touches CYP genes. SelfDecode includes some pharmacogenomic content in its premium reports. None of these, however, should substitute for a clinical pharmacogenomics test if you are managing actual medication decisions. The FDA maintains a Table of Pharmacogenomic Biomarkers in Drug Labeling that is worth reviewing.
How AskMyDNA Fits Into This Landscape
The tools reviewed above all follow a report-generation model: you upload your DNA, the tool runs its analysis, and you receive a document to read. The limitation of this model is that a report cannot respond to follow-up questions, explain an unexpected finding in plain language, or help you understand why a specific variant matters for your particular situation.
AskMyDNA takes a conversational approach. After uploading your raw DNA file, you can ask natural language questions about specific variants, health topics, or genes. The system retrieves your actual genotype data and answers in context — explaining rs1801133 status if you ask about MTHFR, or walking through your APOE genotype and what the research says, without requiring you to navigate a dense report.
This is complementary to, rather than a replacement for, the tools described above. Promethease for comprehensive variant coverage, Genetic Genie for a quick methylation panel with a functional medicine practitioner, SelfDecode for polished organized reports — and AskMyDNA when you have a specific question about what a finding actually means for you. Three free questions with no credit card required makes it easy to test whether the conversational format fits your needs.
Conclusion
SelfDecode, Promethease, and Genetic Genie each solve a different problem. SelfDecode is the right choice for users who want guided, accessible health reports organized by category, are willing to pay a subscription fee, and prefer AI-summarized insights over raw data. Promethease is the right choice for users who want complete coverage of their variants against published research, can tolerate a dense and unstructured report, and want full transparency into the underlying studies. Genetic Genie is the right choice for users working specifically on methylation and detoxification pathways, often in collaboration with a functional medicine practitioner, and who need a quick, free, structured output.
None of these tools produces medical diagnoses or clinical-grade results. All three work from consumer genotyping arrays that cover a fraction of the genome. All share the fundamental limitation that genetic risk is probabilistic, population-level, and always contextual.
The best approach for most people is to use more than one tool: Genetic Genie for a rapid methylation check, Promethease for full variant discovery, and a conversational tool for answering specific follow-up questions. Understanding what these tools can and cannot tell you — covered in the promethease alternatives guide and the broader best DNA upload sites comparison — is the foundation for using any of them well.