What kind of interaction is it?

Caution: an interaction that may reduce efficacy or raise side-effect risk and warrants monitoring.

Is this interaction backed by published research?

Yes. NutriStack lists 1 citation row for the Melatonin + Tart Cherry Extract pair, each linking to PubMed by PMID where available. Full sourcing methodology at https://nutristackapp.com/methodology/interactions.

Supplement × Supplement·a caution·Emerging evidence

Melatonin + Tart Cherry Extract

Q: Can I take Melatonin and Tart Cherry Extract together?

Possibly, but with caution. Melatonin and Tart Cherry Extract have a documented caution-tier interaction. Tart cherry naturally contains small amounts of melatonin, so taking it alongside a melatonin supplement adds a small amount of exogenous melatonin and may produce additive sedative or drowsiness effects.

Q: How does this affect a NutriStack Stack Score?

-5 to your Stack Score per scored caution row.

Caution Emerging evidence

Tart cherry naturally contains small amounts of melatonin, so taking it alongside a melatonin supplement adds a small amount of exogenous melatonin and may produce additive sedative or drowsiness effects.

Supplement × Supplement

Open the interaction checker → Read the methodology

From the database

What the row says.

Every entry follows the same shape: what is happening, the mechanism, and the recommendation.

Substances

Melatonin and Tart Cherry Extract

Pair type

Caution

Evidence

Emerging

Source citations

Scope

Supplement × Supplement

Last verified

June 4, 2026

CautionEmerging evidence

What is happening. Tart cherry naturally contains small amounts of melatonin, so taking it alongside a melatonin supplement adds a small amount of exogenous melatonin and may produce additive sedative or drowsiness effects.

Mechanism. Both products supply melatonin (tart cherry in small quantities), giving additive activation of MT1 and MT2 receptors that can enhance sleepiness and shift circadian timing.

Recommendation. If using both for sleep, start with the lower end of the melatonin dose and assess next-day grogginess. Avoid combining before driving or operating machinery until you know how you respond.

Stack Score

How it moves the number.

Effect on the composite score

If both Melatonin and Tart Cherry Extract are in the same stack, this pair applies −5 to your Stack Score (per scored caution row).

The full algorithm, the clamping rules, and four worked stacks are at /methodology/stack-score.

Sources

Sources, by evidence tier.

Every claim on this page is cited. PMIDs link straight to PubMed.

Reference material

1Howatson G, Bell PG, Tallent J, et al. Effect of tart cherry juice on melatonin levels and enhanced sleep quality. European Journal of Nutrition. 2012.Needs sourceNo link

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