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Limited evidenceLongevity & antioxidants

Telomere Support Formulas

Astragalus-derived blends (TA-65, cycloastragenol) sold to lengthen telomeres. Pooled trials do show longer measured telomeres, but the same analysis found no matching improvement in strength, frailty or inflammation.

Where to buy

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What the science says

  • Measured telomere length increases Moderate evidence

    A 2025 systematic review and meta-analysis of 8 randomized trials (750 participants, mean age 63) found moderate telomere elongation with TA-65 (SMD 0.47), larger in people over 60. Industry-funded trials reported noticeably bigger effects than independent ones.

  • No improvement in how people actually function Moderate evidence

    The same meta-analysis found no effect on frailty measures (grip strength, SPPB, 6-minute walk; SMD 0.09) and none on CRP or IL-6 — a disconnect between the biomarker being sold and the outcomes buyers care about.

  • The original placebo-controlled trial Limited evidence

    A 1-year double-blind trial in 117 CMV-positive adults aged 53–87 found telomere lengthening with the low dose (250 units) but not with the high dose, an inconsistent dose pattern; the study was funded and staffed by the manufacturer.

Dosage & safety

Studied doseTrials used roughly 250–1000 units/day of TA-65 (about 10–50 mg/day in cycloastragenol terms) for 12 months. Generic "telomere support" blends rarely disclose comparable amounts.
SafetyPooled trials reported mild gastrointestinal effects (nausea ~7%, abdominal discomfort ~5%) and no severe adverse events over 12 months. The long-term consequence of chronically activating telomerase — including cancer risk — is unstudied. Avoid with an active or past malignancy unless your oncologist agrees. Very expensive relative to the evidence.

How to take it

TimingMorning, once daily.
With food?With or without food.
Worth knowingAsk what the blend contains in milligrams before buying — most will not say, and the price tells you nothing about the dose.

Interactions

With medications

  • immunosuppressants (ciclosporin, tacrolimus, azathioprine, mycophenolate)

    These blends are astragalus-based and immunostimulating, which may work against the drug. do not combine without medical supervision

Well-established interactions only — this is not a complete list. Always tell your doctor and pharmacist what you take.

Frequently asked questions

Do telomere supplements like TA-65 actually lengthen telomeres?

A 2025 meta-analysis of 8 randomized trials found moderate telomere elongation with TA-65 (SMD 0.47), a moderate-grade finding. Industry-funded trials reported noticeably bigger effects than independent ones.

Does TA-65 make you stronger or less frail?

No: the same meta-analysis found no effect of TA-65 on grip strength, walking tests or other frailty measures, and none on CRP or IL-6. Longer measured telomeres did not translate into better function.

How much TA-65 should I take?

Trials used roughly 250–1000 units/day of TA-65 (about 10–50 mg/day in cycloastragenol terms) for 12 months, once daily in the morning. Generic telomere support blends rarely disclose comparable amounts.

Are telomere support supplements safe?

Pooled trials of telomere support blends reported mild nausea and abdominal discomfort and no severe adverse events over 12 months, but the long-term cancer risk of activating telomerase is unstudied. Avoid them with active or past cancer unless your oncologist agrees, and with immunosuppressants.

Scientific references

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