Probiotics

Probiotics / Prebiotics:

Seeds DS-01 Daily Synbiotic (Tim Ferriss podcast sponsor)

Just Thrive (spore-based, endorsed by Ben Greenfield)

Big Bold Health – Microbiome Rejuvenate (endorsed by Dr. Mark Hyman)

Pendulum (Dr. Peter Attia said on podcast with Dr. Andrew Huberman that this is what he uses and is the only one worth taking)