Seed
PM-02 Sleep + Restore

Seed PM-02 is a genuinely thoughtful product. Its 500mcg biphasic melatonin is the most appropriately dosed melatonin in any sleep supplement we've reviewed. Shoden ashwagandha has a direct sleep RCT behind it. The dual-capsule Co-Biotic system is a real delivery innovation, not marketing theatre. ISO 17025 testing is credible. But the ashwagandha dose is undisclosed — and that's the ingredient the core sleep claim rests on. The Cellular Renewal Complex at 12mg total almost certainly can't fit clinical doses of both spermidine and pterostilbene. With full dose disclosure, this would be an 8 or 9. Currently it's a well-intentioned 7.

Dual-capsule architecture: Outer capsule (body-facing) releases actives systemically. Inner capsule (acid-resistant, chlorophyllin coating) releases postbiotics and prebiotics in the lower GI.

Best melatonin dose in any commercial sleep supplement

500mcg sits squarely within the 0.5–1mg range identified by Brzezinski et al. (2005) as producing physiological nocturnal blood levels. The biphasic release — rapid onset for sleep latency, extended for maintenance — is a meaningful pharmacokinetic improvement over standard immediate-release melatonin. Lewy et al. (1998) demonstrated low-dose melatonin's circadian phase-shifting ability; PM-02's approach respects the mechanism rather than overriding it with a pharmacological dose.

Premium extract with direct sleep RCT — but dose unknown

Shoden is standardised to 35% withanolide glycosides, versus 5% in KSM-66 and 10% in Sensoril. Deshpande et al. (2020) conducted a randomised, double-blind, placebo-controlled trial using 120mg Shoden daily for 6 weeks and found significant improvement in sleep onset latency (−40.9%), sleep efficiency (+8%), total sleep time (+13%), and morning cortisol reduction. This is the most relevant ashwagandha data for a sleep application. Without knowing if PM-02 uses 120mg, the primary evidence claim for ashwagandha cannot be confirmed.

Interesting longevity angle — doses almost certainly sub-clinical

Spermidine at 1–2mg/day has shown autophagy activation in human studies (Eisenberg et al., 2009). Pterostilbene, a bioavailable resveratrol analogue, is typically studied at 50–100mg. At 12mg total for both compounds, neither is likely to reach clinical doses — a 12mg blend containing meaningful amounts of both is mathematically challenging. The cellular renewal concept is scientifically interesting but likely present at nominal levels in this formula.

Novel gut-brain axis approach — individual doses undisclosed

Lactobacillus brevis is a GABA-producing strain. The gut-brain axis is a real pathway for neurotransmitter signalling — Cryan et al. (2019) reviewed the mechanisms thoroughly. Postbiotics (bioactive compounds from probiotic metabolism) are increasingly recognised as effective without requiring live organism delivery. At 200mg total, if a meaningful L. brevis-derived GABA fraction is present, this could contribute meaningfully. The doses are undisclosed, making quantitative assessment impossible.

Mitochondrial support — interesting addition, dose unknown

Harris et al. (2013) found 20mg PQQ improved aspects of sleep quality in 65 middle-aged participants. PQQ supports mitochondrial biogenesis and functions as an antioxidant. The dose in PM-02 is not disclosed — clinical benefit at 20mg may not transfer at lower doses.

Cofactors for melatonin synthesis — appropriate doses

Riboflavin (B2) and niacin (B3) are cofactors in the tryptophan → melatonin pathway. Thiamine (B1) supports mitochondrial function. These doses are at or near the RDA — sufficient as cofactors for existing biosynthetic pathways. Clayton (2010) reviewed B6's (not included here) more direct role; B2 and B3 are upstream cofactors.

ISO 17025 is the international standard for testing laboratory competence — it covers calibration, testing methodology, uncertainty measurement, and quality management. It is a meaningful accreditation. Seed does not specify whether testing covers identity verification, potency, contaminants, or all three. For consumers, this is a credible but incompletely described testing claim.

Brand Protocol

Take 2 capsules daily, ideally on an empty stomach.

The empty stomach recommendation is important for both capsule layers: the outer capsule actives (ashwagandha, melatonin) absorb better without food competition; the inner acid-resistant capsule needs to transit through the stomach intact, which is less reliable if food has slowed gastric motility.

Practical notes

• Take 30–45 minutes before target sleep time. At 500mcg, melatonin onset is subtle — don't expect the sedation common with 5–6mg products.
• Ashwagandha effects on cortisol and sleep quality are cumulative. Consistent daily use for 2–4 weeks is needed for full benefit (Deshpande et al., 2020 used 6 weeks).
• The postbiotic inner capsule benefits the gut microbiome — effects on the gut-brain axis may take longer to manifest than the acute melatonin effect.
• Do not crush or open the capsules — the dual architecture depends on both shells remaining intact.

Note on value metric: The value metric above uses melatonin as the only fully-specified active since the ashwagandha, spermidine, and pterostilbene doses are undisclosed. This understates PM-02's value proposition — Shoden ashwagandha is an expensive, premium extract and the dual-capsule architecture has real manufacturing cost. At $1.17/serving, PM-02 is reasonably priced for its innovation level if the undisclosed doses are at clinical levels. Prices verified May 2026.

Seed PM-02 is the most forward-thinking sleep supplement in this review group. The biphasic 500mcg melatonin is exactly right. Shoden ashwagandha is the most credible cortisol/sleep ingredient available. The Co-Biotic dual delivery is a genuine architectural innovation. ISO 17025 testing is credible. If Seed disclosed the ashwagandha dose, the Cellular Renewal Complex individual amounts, and the GABA/postbiotic breakdown, this would score 8–9/10. The opaque blends — particularly hiding the dose of the product's headline ingredient — prevent full recommendation. Buy it knowing the innovation is real; hope the doses match the RCTs.

1. Brzezinski A et al. (2005). Effects of exogenous melatonin on sleep: a meta-analysis. Sleep Medicine Reviews, 9(1):41–50. doi →
2. Lewy AJ et al. (1998). Low, but not high, doses of melatonin entrained a free-running blind person with a long circadian period. Chronobiology International, 15(2):119–130. doi →
3. Deshpande A et al. (2020). A randomized, double blind, placebo controlled study to evaluate the effects of ashwagandha root extract on sleep quality. Sleep Medicine, 72:28–36. doi →
4. Eisenberg T et al. (2009). Induction of autophagy by spermidine promotes longevity. Nature Cell Biology, 11(11):1305–1314. doi →
5. Harris CB et al. (2013). Dietary pyrroloquinoline quinone (PQQ) alters indicators of inflammation and mitochondrial-related metabolism in human subjects. Journal of Nutritional Biochemistry, 24(12):2076–2084. doi →
6. Cryan JF et al. (2019). The microbiota-gut-brain axis. Physiological Reviews, 99(4):1877–2013. doi →
7. Hepsomali P et al. (2020). Effects of oral GABA administration on stress and sleep. Frontiers in Neuroscience, 14:923. doi →
8. Clayton PT. (2010). B6-responsive disorders: a model of vitamin dependency. Journal of Inherited Metabolic Disease, 29(2–3):317–326. doi →
9. Ferracioli-Oda E, Qawasmi A, Bloch MH. (2013). Meta-analysis: melatonin for the treatment of primary sleep disorders. PLOS ONE, 8(5):e63773. doi →