Does Mark Hyman recommend L-Theanine?
Yes — Mark Hyman has directly recommended L-Theanine.
Published research rates it moderate evidence. Of Mark Hyman's 4 tracked claims, 4 are supported or partially supported by studies on PubMed.
Evidence last reviewed May 2026
Mark Hyman on L-Theanine — 4 claims
“theanine is an amino acid that can be helpful”
Theanine is an amino acid that can be helpful for actively managing stress.
Multiple systematic reviews (PMIDs 31758301, 39633316) and RCTs (PMID 38975711) provide direct evidence that L-theanine supplementation is associated with reductions in stress and anxiety-like symptom…
“theanine is an amino acid that can be helpful”
Theanine is an amino acid that can be helpful for actively managing stress.
The claim that L-theanine is helpful for actively managing stress is supported by multiple study types in the provided evidence. A systematic review (PMID: 31758301) specifically evaluated pure L-thea…
“other things can be helpful like theanine Gaba 5htp”
Theanine can be helpful as a sleep/wind-down aid.
The most directly relevant evidence is a systematic review and meta-analysis (PMID: 40056718) specifically examining L-theanine's effects on sleep outcomes across multiple RCTs, which provides the str…
“other things can be helpful like theanine Gaba 5htp”
Theanine can be helpful as a sleep/wind-down aid.
A systematic review and meta-analysis (PMID: 40056718) directly evaluated L-theanine's effects on sleep outcomes across randomized controlled trials, providing the strongest direct evidence for this c…
Other supplements Mark Hyman discusses
Claims are extracted from publicly available podcasts and videos, attributed to their source, and compared against PubMed research. This is educational information only — consult a healthcare provider before starting any supplement.
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