Guanosine

SpecialtyNucleoside

What is it

Guanosine is a purine nucleoside consisting of guanine attached to a ribose sugar. It is a precursor for GTP and the building block of RNA. Free guanosine appears in supplements as a putative neuroprotective and energy-supporting compound.

Evidence for 2 uses

AI-assisted evidence assessment — talk to your doctor before relying on any single supplement.

Neuroprotection (preclinical)

Mixed Evidence

Animal models suggest neuroprotective effects. No human clinical evidence.

Mood / anxiety

Mixed Evidence

Animal studies suggest antidepressant and anxiolytic effects. Human evidence absent.

How it works

After ingestion, guanosine can be absorbed and may cross the blood-brain barrier, contributing to extracellular guanine nucleotide signaling. Preclinical studies suggest neuroprotective, anxiolytic, antidepressant, and analgesic effects, possibly through modulation of glutamate transporters, adenosine signaling, and trophic factors. Human clinical evidence is essentially absent.

Dosage

No established human dose. Purine supplements raise serum uric acid, which is a concern.

When and how to take it

No evidence-based timing established.

1 commercial form

Compare the main delivery options and what they’re best suited for.

Guanosine (research/supplement)

Used in some nootropic blends without good clinical evidence.

Variable oral bioavailability.

Safety

Guanosine catabolism produces uric acid; chronic high-dose supplementation could worsen gout or hyperuricemia. Limited human safety data.

Who should be cautious

Avoid in people with gout, hyperuricemia, or kidney stones. Avoid in pregnancy and breastfeeding. Not recommended for routine consumer use.

Interactions

May affect serum uric acid; theoretical interaction with allopurinol and uric-acid-lowering drugs. May interfere with antiviral nucleoside analogs.

Food sources

Organ meats and seafood (purine sources)

Amount
100 g
%DV
—

Frequently asked questions

Is guanosine the same as guanine?⌄

Guanosine is guanine plus ribose. Guanine is the free base.

Will it raise my uric acid?⌄

Likely yes, especially in high doses. People with gout or kidney stones should avoid.

References

Guanosine on Wikidata — Wikidata link

Guanosine (ChEBI:16750) — ChEBI link

Guanosine (PubChem CID 135398635) — PubChem link

Guanosine on NIH DSLD (US supplement label database) — NIH Dietary Supplement Label Database link

Research on Guanosine (PubMed search) — PubMed link

Track Guanosine with Pilora

Set up dose reminders, check interactions, and join the community in the Pilora iPhone app.

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Evidence-based·How we grade evidence

Disclaimer: These statements have not been evaluated by the FDA. This page is educational, not a substitute for personalized medical advice. Evidence grades are AI-assisted assessments — talk to your doctor before starting any new supplement, especially if you’re pregnant, breastfeeding, on medications, or managing a chronic condition.