Cutting T3 (Liothyronine)
- Form
- Tab
- Sizes
- 25mcg × 100 Tabs, 40mcg × 100 Tabs, 100mcg × 100 Tabs, 20mcg × 100 Tabs, 50mcg × 100 Tabs, 50mcg × 50 Tabs
- Price (per bottle)
- 20 - 155 EUR
Product Comparison
T3 (Liothyronine) vs T4 (Levothyroxin)
T3 (Liothyronine, active) versus T4 (Levothyroxine, prodrug). Direct action versus liver conversion.
Cutting 
Cutting T4 (Levothyroxin)
- Form
- Tab
- Sizes
- 40mcg × 100 Tabs, 100mcg × 50 Tabs, 100mcg × 120 Tabs, 200mcg × 100 Tabs
- Price (per bottle)
- 32 - 115 EUR
By the numbers
Number of sizes T3 (Liothyronine): 6 T4 (Levothyroxin): 4
Smallest size T3 (Liothyronine): 0.02 mg T4 (Levothyroxin): 0.04 mg
Largest size T3 (Liothyronine): 0.1 mg T4 (Levothyroxin): 0.2 mg
Price from (per bottle) T3 (Liothyronine): 20 EUR T4 (Levothyroxin): 32 EUR
Price up to (per bottle) T3 (Liothyronine): 155 EUR T4 (Levothyroxin): 115 EUR
Values from the sizes and catalogue prices on this page, without Express and discounts.
Half-life compared
How quickly do they break down?
Share left after one dose, calculated from the half-lives in the lexicon
T3 (Liothyronine)~24 hoursT4 (Levothyroxin)~7 days
Half-life = 50 %
Day 14 after the dose
T4 (Levothyroxin)25 %
T3 (Liothyronine)< 0.1 %
| Product | Half-life | Day 7 | Day 14 | Day 28 |
|---|---|---|---|---|
| T4 (Levothyroxin) | ~7 days | 50 % | 25 % | 6.3 % |
| T3 (Liothyronine) | ~24 hours | 0.8 % | < 0.1 % | < 0.1 % |
Simplified model without an absorption phase, half-lives from the TPD lexicon.
| Feature | T3 (Liothyronine) | T4 (Levothyroxin) |
|---|---|---|
| Category | Cutting | Cutting |
| Subcategory | Thyroid | Thyroid |
| Form | Tab | Tab |
| Price range | 20 - 155 EUR | 32 - 115 EUR |
| GLP-1 | No | No |
Quick reference
What both have in common
- Same subcategory: Thyroid - addressed via overlapping mechanisms.
- Same main category: Cutting / Cutting
This page is a high-level comparison for community discussion only. Refer to the linked detail pages for full descriptions, risk profiles and peer-reviewed studies. Not medical advice.
