Caffeine + L-Theanine
L-theanine smooths caffeine’s edge, supporting calm, sustained focus and alertness without the jittery spike-and-crash.*
Keep caffeine earlier in the day to protect sleep.
A daytime stack for clean, steady energy without the jitter. It pairs caffeine with L-theanine, adds foundational creatine and amino acids, supports cognitive function with a choline source, and uses an afternoon adaptogen to help you stay steady through the day.
Energy sits downstream of Sleep + Stress: no stack can fully make up for short or broken nights. Steady daytime energy, in turn, supports mood, libido, and Hormone Health, with mitochondrial, metabolic, and gut health underneath it all. Training recovery starts in the gut too: digestion is where protein becomes the building blocks muscles rebuild with, and L-Glutamine (on the Gut Health page) supports both gut lining integrity and recovery if you train hard. Read the full protocol story.
Also see Hormone Health, Fertility & Sexual Wellness: steady energy and blood sugar support mood, drive, and healthy hormone balance.
These cost nothing and do the heavy lifting. Supplements are meant to sit on top of them, not replace them.
5 products · Brand options are listed for each; choose one that fits your preferences and budget.
L-theanine smooths caffeine’s edge, supporting calm, sustained focus and alertness without the jittery spike-and-crash.*
Keep caffeine earlier in the day to protect sleep.
One of the most studied supplements available. Supports muscle strength, power output, and cellular energy (ATP) recycling, with emerging support for cognitive performance.*
Look for third-party tested, pure creatine monohydrate. Hydrate well.
Bioavailable choline sources that support acetylcholine production, memory, and focus, a natural pairing with a morning caffeine + theanine stack.*
Choose one form to start; Mind Lab Pro includes citicoline in a multi-ingredient formula.
An early-afternoon adaptogen supports mental stamina and resilience to everyday stress, helping you stay steady through the post-lunch dip without more caffeine.*
Rhodiola can feel stimulating for some; take it earlier in the day. Ashwagandha is also listed under Sleep + Stress.
A good pre-workout option, including during a fasted window: all nine essential amino acids provide the building blocks for muscle protein synthesis and recovery with minimal calories, so many people use them while fasting.*
Does not replace complete protein from meals. Leucine still signals muscle-building pathways, so if your fast has a specific goal beyond calories, check with your clinician or coach.
Talk to your healthcare provider first. Supplements affect everyone differently and can interact with medications. Start with one product at a time at the low end of the dose range, and check with your clinician before starting, especially if you are pregnant, nursing, taking prescription medication, or managing a health condition. Doses shown are typical label ranges, not personal recommendations.