NMN vs NR vs NAD+: Which Is Best for Raising NAD?
NMN scores 6.0–6.5/10, NR 6.0–6.5/10, and direct NAD+ 5.0–5.5/10. The oral precursors win on evidence and price. NMN takes blood sugar and metabolic health. NR takes cardiovascular and…
- NMN
- NR
- NAD+
Best Interventions for DNA Repair, Ranked by Evidence
Every intervention Outliyr has scored for dna repair, ranked by its BioHarmony score for this use case rather than its overall rating. The number beside each name is how well that one thing works for dna repair; the tier beside it is what it is worth once safety, cost and effort are counted across everything else.
20 of 90 evaluated interventions score 3.0+ out of 10 for dna repair · 1 comparison
Ranked for DNA Repair
Category
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Ca-AKG (Calcium Alpha-Ketoglutarate)
Shahmirzadi 2020 anchors the strongest signal. The existing rationale points to this narrower claim: this verified source reported a methylation-age reduction in 42 Rejuvant users, but the study was uncontrolled, retrospective, vitamin-confounded,…
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Glycine
Kumar 2023 anchors the most relevant signal. Glycine fits telomere dna because glycine participates in sleep signaling, glutathione, collagen, methylation, and nervous-system balance, depending on the endpoint. The score stays bounded because…
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GHK-Cu
Pickart L, Thaler 1977 supports selective use. The v0 DNA-repair score is preserved because Pickart 2014 reports DNA-repair gene upregulation patterns. This is not equivalent to demonstrated telomere extension, lower cancer incidence,…
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Rapamycin
Harrison 2009 anchors the most relevant signal. Rapamycin fits telomere dna when mTORC1 modulation, autophagy, immune aging, or senescence biology is the actual target. The score stays bounded because human longevity endpoints…
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Senolytics
Shimizu et al. 2025 supports the main pathway. Lee 2024 found concerning first-generation clock and telomere signals with DQ, while second and third-generation clocks were not significant. The score stays bounded because…
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Hyperbaric Oxygen Therapy
The telomere-length signal is one of the better longevity-specific findings for HBOT. Hachmo 2020 reports immune-cell telomere lengthening after sixty hard-chamber sessions in older adults. The trial is small and not a…
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Epitalon
Al-dulaimi et al. 2025 is the best anchor here because it reports independent in vitro study and normal epithelial and fibroblast cell telomere extension plus cancer-cell ALT activation caution. Al-dulaimi et al.…
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Zone 2 Cardio
The existing rationale points to this narrower claim: Moderate physical activity is associated with healthier biological-aging markers in cohort literature, including telomere-related endpoints. These are associative and confounded by broader. That does…
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Essential Amino Acids
Wittholz 2024 reports Systematic review found heterogeneity high enough that planned meta-analysis was not possible. Hughes 2024 points in the same direction, but route, dose, baseline status, and outcome tracking decide whether…
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Metformin
Observational data from the CPRD cohort show no clear association between Metformin use and longer telomeres Bannister et al. 2014. Mechanistic arguments exist but human epigenetic or telomere measurements remain weak. The…
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Semaglutide
Semaglutide may improve metabolic stressors that correlate with DNA aging, but the report has no human telomere-preservation endpoint. Lincoff 2023 supports cardiovascular event reduction, not telomere repair. The neutral score keeps the…
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Spermidine
Weak telomere and genomic-maintenance signal; not a primary mechanism in verified human evidence.
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Methylene Blue
Telomere and DNA-aging claims are weaker than the main mitochondrial story. No verified human telomere trial was available in the audit; use of Rodriguez 2016 should remain limited to acute brain-task effects,…
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Whole-Body Vibration
No direct telomere or DNA-repair evidence. This subrating remains neutral-low because whole-body vibration has not been tested as a genomic-aging intervention.
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Norwegian 4×4
Aerobic exercise is associated with telomere maintenance in observational work. Norwegian 4x4 should not be framed as a direct telomere intervention.
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GlyNAC (Glycine + N-Acetylcysteine)
Reduced genomic damage was reported as one of the improved aging hallmarks in Kumar 2023, but this is a biomarker-level finding in a small single-lab trial, not a telomere outcome.
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Ergothioneine
One trial noted a within-group telomere-length increase, but this was exploratory in a small study and far from established.
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Astaxanthin
Theoretical oxidative-DNA protection only. No direct telomere RCT evidence.
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NMN (Nicotinamide Mononucleotide)
PARP-mediated DNA repair depends on NAD+, but NMN has no verified human telomere or DNA-damage endpoint trial showing meaningful clinical benefit.
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Tirzepatide
No tirzepatide trial shows telomere lengthening, DNA repair enhancement, or genomic stability improvement. Weight loss and lower inflammation may indirectly reduce stress biology. That is insufficient for a meaningful score. Keep low…
Nothing matches those filters.
What each one costs
Monthly out-of-pocket cost at the most accessible legitimate channel, at the dose the score was given for. 6 of 20 are not priced yet; those cells are left blank rather than guessed.
| Intervention | Monthly cost | At dose | How you get it |
|---|---|---|---|
| Ca-AKG (Calcium Alpha-Ketoglutarate) | $15–$30 | 1 g/day generic Ca-AKG oral | Over the counter |
| Glycine | $2–$3 | 3 g oral glycine | Over the counter |
| GHK-Cu | $30–$100 | 0.5-3% topical serum or cream | Over the counter |
| Rapamycin | $15–$50 | 3 mg | Prescription |
| Senolytics | Not priced yet | ||
| Hyperbaric Oxygen Therapy | $3,000–$6,000 | 2.0 ATA for 90 minutes with air breaks | In clinic |
| Epitalon | $95–$1,100 | 5-10 mg/day subcutaneous | Grey market |
| Zone 2 Cardio | Not priced yet | Over the counter | |
| Essential Amino Acids | Not priced yet | ||
| Metformin | $4–$30 | 500 mg with dinner for 1 week, then 500 mg twice daily for 1 week, then increase by 500 mg/week toward 1000 mg twice daily as tolerated | Prescription |
| Semaglutide | $199–$349 | 0.25 mg weeks 1 to 4, 0.5 mg weeks 5 to 8, 1.0 mg weeks 9 to 12, 1.7 mg weeks 13 to 16, 2.4 mg week 17 onward | Prescription |
| Spermidine | $40–$90 | 1-3 mg/day oral WGE | Over the counter |
| Methylene Blue | $13–$40 | 0.5-5 mg oral | Over the counter |
| Whole-Body Vibration | $50–$100 | 30 Hz, roughly 0.3g, 10-20 min standing | Over the counter |
| Norwegian 4×4 | Not priced yet | Over the counter | |
| GlyNAC (Glycine + N-Acetylcysteine) | $10–$30 | Glycine and NAC at ~100 mg/kg/day each | Over the counter |
| Ergothioneine | Not priced yet | ||
| Astaxanthin | Not priced yet | ||
| NMN (Nicotinamide Mononucleotide) | $40–$100 | 500 mg/day oral | Over the counter |
| Tirzepatide | $299–$449 | 2.5 to 5 to 7.5 to 10 to 12.5 to 15 mg | Prescription |
Comparisons that judge dna repair
Head-to-head reports and category rankings that name a winner on this use case.
Questions about dna repair
What scores highest for dna repair?
Ca-AKG (Calcium Alpha-Ketoglutarate), at 6.0–6.5 out of 10 for dna repair. Shahmirzadi 2020 anchors the strongest signal.
What is the cheapest thing that works for dna repair?
Of the top-scoring options, Glycine is the least expensive at about $2 a month, scoring 6.0–6.5 out of 10 for dna repair.
How many interventions has Outliyr scored for dna repair?
20 of the 90 interventions evaluated for dna repair score 3.0 out of 10 or better, which is the cut-off for appearing on this page.
