Can I take L-Theanine and Caffeine together?

Yes, L-Theanine and Caffeine is one of the most well-studied synergistic nootropic combinations. Theanine smooths the stimulation of caffeine, reducing jitter and improving sustained attention.

Can I combine BPC-157 and TB-500?

BPC-157 and TB-500 are commonly stacked for recovery because they target different healing pathways (BPC-157 promotes angiogenesis and GI repair, TB-500 promotes actin-based tissue migration). No clinically significant interactions are documented in research contexts, though the combination has not been studied in humans long-term.

What nootropics interact with SSRIs?

Compounds with serotonergic activity should be avoided with SSRIs due to serotonin syndrome risk, including 5-HTP, St. John's Wort, SAM-e, Kanna, and high-dose tryptophan. Always consult a clinician before stacking any serotonergic compound with an SSRI or SNRI.

Is it safe to stack multiple peptides?

Many peptides can be safely combined, but stacking increases both benefits and risks. Start with single compounds, add one new peptide at a time with at least 2 weeks between additions, and use an interaction checker to flag redundant or dangerous combinations. Avoid stacking multiple GLP-1 agonists (e.g., semaglutide + tirzepatide).

Do nootropics interact with each other?

Yes. Common interactions include additive cholinergic effects (racetams + Alpha-GPC + huperzine A can cause over-stimulation), dopaminergic additivity (L-DOPA + selegiline), and serotonergic risk (5-HTP + any SSRI). This tool flags known interactions across the BodyHackGuide compound database.

Compare notes on r/BodyHackGuideCompare notes with other researchers. Join r/BodyHackGuide

Safety Tool

Nootropic Interaction Checker

Enter 2-5 nootropics and instantly see synergies, redundancies, and safety warnings. Powered by clinical data and community experience.

Or load a popular stack:

Select Compounds

AniracetamAlpha-GPCL-TheanineSulbutiamine

Prescription Medication Warnings

SSRIs / SNRIsStimulant medication (Adderall, etc.)Blood thinnersBlood pressure medicationBirth control

Stack Safety Assessment

7/10

Good

2 Synergistic4 Neutral

✅ No safety concerns detected. This stack looks compatible.

Interaction Matrix

	Aniracetam	Alpha-GPC	L-Theanine	Sulbutiamine
Aniracetam	—	Synergistic	Neutral	Synergistic
Alpha-GPC		—	Neutral	Neutral
L-Theanine			—	Neutral
Sulbutiamine				—

Detailed Pair Breakdown

View Aniracetam View Alpha-GPC View L-Theanine View Sulbutiamine

Get nootropic research by email

Guides on stacking, dosing and safety. No set schedule. Unsubscribe anytime.

Build a Stack

Personalized protocol builder

Take the Quiz

Find your ideal compounds

Find a coach

Independent coaches who take bookings

Free 2026 Peptide Cheat Sheet (PDF)

38 compounds and blends: vial sizes, BAC water volumes, dosing ranges and bloodwork markers.

Download Free