FS315 vs Human Insulin
Head-to-head comparison of FS315 (Follistatin-315 (FS315)) and Human Insulin (Insulin (recombinant human insulin)) — benefits, dosing, side effects, research data, and where to buy.
Research Score
| Property | FS315 | Human Insulin |
|---|---|---|
| Category | Muscle & Performance | Muscle & Performance |
| Full Name | Follistatin-315 (FS315) | Insulin (recombinant human insulin) |
| Molecular Weight | ~40 kDa | 5808 Da |
| Half-Life | N/A; depends on construct/delivery | 5-10 minutes |
| Amino Acids | 315 | 51 |
| Typical Dose | Research-only; no standardized human dose | 0.05-0.3 U/kg |
| Route | Intramuscular / research expression systems | Subcutaneous |
| Purity | ≥98% | ≥98% |
| Studies Count | 95 | 5000 |
| Research Status | Pre-clinical | Clinical |
FS315 Benefits
- ✓activin neutralization
- ✓muscle growth signaling
- ✓anti-catabolic support
- ✓tissue repair modulation
Human Insulin Benefits
- ✓reduces proteolysis
- ✓improves nutrient partitioning
- ✓supports glycogen replenishment
- ✓enhances postprandial muscle protein balance
FS315 Dosing
Research-only recombinant/protein-expression studies|no standardized clinical dose|route varies by platform
Human Insulin Dosing
0.05-0.3 U/kg SC (clinical)|timed with carbohydrate/protein intake|individualized glucose monitoring required
FS315 Side Effects
- ⚠off-target endocrine effects
- ⚠immune response risk
- ⚠fluid balance changes
Human Insulin Side Effects
- ⚠hypoglycemia
- ⚠weight or fat gain
- ⚠injection-site reactions
Research Overview
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.
Human Insulin
Human and animal studies show insulin powerfully suppresses whole-body and muscle protein breakdown while increasing amino acid uptake and glycogen storage. It is widely established in clinical nutrition and endocrinology, with anabolic effects on muscle being secondary to its anti-catabolic action.
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