06/17/2026
Your optimization stack is missing one variable. Not a supplement. Not a wearable upgrade. A number that quietly overrides everything else you are tracking.
Cortisol (your body's main stress hormone) is the one biomarker most high-performers have never actually measured. Yet according to research published in the International Journal of Environmental Research and Public Health, just 20 minutes of forest exposure reduces cortisol levels by an average of 21%. That is a measurable, repeatable biological shift.
Here is why that matters: when cortisol runs high, your body suppresses testosterone, holds onto body fat, and slows recovery. You can train harder, sleep cleaner, and eat perfectly, and elevated cortisol will quietly undo it all.
"𝙄 𝙝𝙖𝙙 𝙤𝙥𝙩𝙞𝙢𝙞𝙯𝙚𝙙 𝙚𝙫𝙚𝙧𝙮𝙩𝙝𝙞𝙣𝙜. 𝙎𝙡𝙚𝙚𝙥 𝙨𝙘𝙤𝙧𝙚 𝙬𝙖𝙨 𝙜𝙧𝙚𝙖𝙩. 𝙏𝙧𝙖𝙞𝙣𝙞𝙣𝙜 𝙬𝙖𝙨 𝙙𝙞𝙖𝙡𝙚𝙙. 𝘽𝙪𝙩 𝙄 𝙬𝙖𝙨 𝙨𝙩𝙞𝙡𝙡 𝙜𝙖𝙞𝙣𝙞𝙣𝙜 𝙬𝙚𝙞𝙜𝙝𝙩 𝙖𝙧𝙤𝙪𝙣𝙙 𝙢𝙮 𝙢𝙞𝙙𝙨𝙚𝙘𝙩𝙞𝙤𝙣 𝙖𝙣𝙙 𝙢𝙮 𝙙𝙧𝙞𝙫𝙚 𝙬𝙖𝙨 𝙜𝙤𝙣𝙚. 𝙉𝙤𝙗𝙤𝙙𝙮 𝙝𝙖𝙙 𝙚𝙫𝙚𝙧 𝙩𝙚𝙨𝙩𝙚𝙙 𝙢𝙮 𝙘𝙤𝙧𝙩𝙞𝙨𝙤𝙡 𝙥𝙖𝙩𝙩𝙚𝙧𝙣. 𝙒𝙝𝙚𝙣 𝙅𝙖𝙨𝙤𝙣'𝙨 𝙩𝙚𝙖𝙢 𝙧𝙖𝙣 𝙩𝙝𝙚 𝙛𝙪𝙡𝙡 𝙥𝙖𝙣𝙚𝙡, 𝙬𝙚 𝙛𝙤𝙪𝙣𝙙 𝙞𝙩 𝙬𝙖𝙨 𝙚𝙡𝙚𝙫𝙖𝙩𝙚𝙙 𝙖𝙡𝙡 𝙙𝙖𝙮. 𝙎𝙞𝙭 𝙬𝙚𝙚𝙠𝙨 𝙞𝙣𝙩𝙤 𝙩𝙝𝙚 𝙥𝙧𝙤𝙩𝙤𝙘𝙤𝙡, 𝙄 𝙛𝙚𝙡𝙩 𝙡𝙞𝙠𝙚 𝙢𝙮𝙨𝙚𝙡𝙛 𝙖𝙜𝙖𝙞𝙣 𝙛𝙤𝙧 𝙩𝙝𝙚 𝙛𝙞𝙧𝙨𝙩 𝙩𝙞𝙢𝙚 𝙞𝙣 𝙩𝙝𝙧𝙚𝙚 𝙮𝙚𝙖𝙧𝙨."
At Jason Carreno's clinic, cortisol is not an afterthought. It is a core variable tracked alongside your labs, wearables, and hormone protocol, because no optimization system works while this one number is running unchecked.
What does your stress hormone look like right now? Book your assessment and find out.