Secretin vs FS315
Head-to-head comparison of Secretin (Human Secretin) and FS315 (Follistatin-315 (FS315)) — benefits, dosing, side effects, research data, and where to buy.
| Property | Secretin | FS315 |
|---|---|---|
| Category | Gastrointestinal | Muscle & Performance |
| Full Name | Human Secretin | Follistatin-315 (FS315) |
| Molecular Weight | 3055.4 Da | ~40 kDa |
| Half-Life | 5-7 minutes | N/A; depends on construct/delivery |
| Amino Acids | 27 | 315 |
| Typical Dose | 0.2 mcg/kg IV | Research-only; no standardized human dose |
| Route | Intravenous | Intramuscular / research expression systems |
| Purity | ≥98% | ≥98% |
| Studies Count | 800 | 95 |
| Research Status | Clinical | Pre-clinical |
Secretin Benefits
- ✓stimulates-pancreatic-secretion
- ✓supports-bicarbonate-release
- ✓aids-duodenal-pH-control
- ✓helps-digestive-coordination
FS315 Benefits
- ✓activin neutralization
- ✓muscle growth signaling
- ✓anti-catabolic support
- ✓tissue repair modulation
Secretin Dosing
0.2 mcg/kg IV diagnostic dose|research infusion protocols|short bolus administration
FS315 Dosing
Research-only recombinant/protein-expression studies|no standardized clinical dose|route varies by platform
Secretin Side Effects
- ⚠flushing
- ⚠nausea
- ⚠abdominal-cramping
FS315 Side Effects
- ⚠off-target endocrine effects
- ⚠immune response risk
- ⚠fluid balance changes
Research Overview
Secretin
Secretin is a classic GI hormone with extensive physiology literature and established diagnostic use. It remains important for studying pancreatic secretory function, biliary responses, and duodenal feedback.
FS315
Follistatin-315 is a key reference isoform in studies of muscle anabolism and reproductive/endocrine biology. In muscle research, it is relevant because it suppresses activin and can indirectly blunt myostatin pathway output.
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