gap/no-direct-evidence

Aug 18, 2026

• gap/needs-human-replication
• gap/no-approved-hydrogenotrophic-probiotic
• gap/needs-extraction
• gap/needs-invitro-gas-data
• gap/no-direct-evidence
• gap/contradictory-evidence
• gap/needs-updated-survey
• gap/needs-verification

Aug 18, 2026

• gap/dose-response-unclear
• gap/long-term-unknown
• gap/no-direct-evidence