Hormone Support · 2026 Protocol Guide
T3/T4 Thyroid Blend Protocol — Beginner to Advanced
Complete T3/T4 Thyroid Blend dosing protocol with three tiers (Beginner / Intermediate / Advanced), cycle structure, stack pairings, and where to source each component at the lowest current price. Evidence-based, vendor-neutral, updated weekly.
Quick reference
Typical dose
75 mcg
Frequency
Levothyroxine (T4): once daily in the morning on an empty stomach. Liothyronine (T3): its short (~1 day) half-life means it is split into two or more daily doses, or given as a slow-release form, to avoid post-dose serum T3 peaks.
Cycle length
Not a 'cycle' drug. Thyroid replacement for genuine hypothyroidism is typically lifelong and continuous, adjusted to labs - not run in on/off cycles. The on/off 'cycling' seen in gray-market fat-loss use is a misuse pattern that risks thyrotoxicosis on and rebound hypothyroid symptoms off; it is not endorsed.
Route
T3/T4 Thyroid Blend protocol tiers
Beginner Tier
4 weeksFirst-cycle protocol. Conservative dose, twice-daily timing for steady state, shorter cycle to evaluate response before extending.
Dose
38 mcg
Frequency
Levothyroxine (T4): once daily in the morning on an empty stomach. Liothyronine (T3): its short (~1 day) half-life means it is split into two or more daily doses, or given as a slow-release form, to avoid post-dose serum T3 peaks.
Weekly adjustment
Hold dose constant; track response week-by-week.
Intermediate Tier
8 weeksStandard published-research protocol. Mid-range dose, daily or split-daily, full cycle length matching the canonical clinical/research timeframe.
Dose
75 mcg
Frequency
Levothyroxine (T4): once daily in the morning on an empty stomach. Liothyronine (T3): its short (~1 day) half-life means it is split into two or more daily doses, or given as a slow-release form, to avoid post-dose serum T3 peaks.
Weekly adjustment
Stable dose; reassess at midpoint and final week.
Advanced Tier
10 weeksHigher-dose research-tier protocol. Only after a successful Intermediate cycle. Closer monitoring required; bloodwork recommended where applicable.
Dose
113 mcg
Frequency
Levothyroxine (T4): once daily in the morning on an empty stomach. Liothyronine (T3): its short (~1 day) half-life means it is split into two or more daily doses, or given as a slow-release form, to avoid post-dose serum T3 peaks.
Weekly adjustment
Monitor markers weekly; titrate down at first sign of saturation or side effect.
Research profile
Mechanism, half-life, peer-reviewed studies for T3/T4 Thyroid Blend.
Dosage guide
Numerics + frequency + titration guidance for T3/T4 Thyroid Blend.
Reconstitution calculator
Vial size + BAC water → concentration, syringe units, doses per vial.
T3/T4 Thyroid Blend protocol FAQ
How long is a typical T3/T4 Thyroid Blend protocol?
Standard T3/T4 Thyroid Blend protocols run 8 weeks for a full Intermediate cycle. Beginner cycles compress to ~4 weeks for response assessment. Advanced cycles extend to ~10 weeks but require closer monitoring.
What's the safest dose to start a T3/T4 Thyroid Blend cycle with?
The Beginner tier starts at 38 mcg levothyroxine (t4): once daily in the morning on an empty stomach. liothyronine (t3): its short (~1 day) half-life means it is split into two or more daily doses, or given as a slow-release form, to avoid post-dose serum t3 peaks. — half the published Intermediate-tier dose. Hold for 2-3 weeks to assess tolerance and response, then escalate to the standard 75 mcg if no adverse signals.
Do I need to cycle off T3/T4 Thyroid Blend?
Cycling depends on the compound's mechanism. Receptor-saturating compounds (most peptides) benefit from 4-6 week off-cycles between protocols to prevent downregulation. Non-saturating compounds (some healing peptides) can run continuously. The full T3/T4 Thyroid Blend research profile covers this in detail — see cross-link below.
Can I stack T3/T4 Thyroid Blend with other compounds?
Stacking is common for synergistic effects, but each compound's mechanism, half-life, and route of administration matter. Use the BodyHackGuide stack builder + interaction checker to validate any pairing. The "Where to source" section below ranks vendors who carry T3/T4 Thyroid Blend alongside complementary compounds in one shipment.
Research-use disclaimer. All protocols on this page are summaries of published research literature and community-reported dosing — they are not medical advice and not authorization for human consumption. Compounds linked from this page are sold for research-use only by their respective vendors. Always consult a licensed practitioner before any compound enters a clinical context.
Affiliate disclosure. BodyHackGuide may earn a commission from purchases via the links on this page — at no additional cost to you. Vendor rankings are based on live price-per-mg data and the published Trust Score rubric. See our affiliate disclosure for details.
Free 2026 Peptide Cheat Sheet — 50 pages, PDF
Reconstitution math, concentration charts, half-lives, and vendor trust tiers. The reference we wish we had on day one.