Inositol is a carbocyclic sugar that functions as a secondary messenger in insulin signaling pathways. Its primary relevance to healthspan is its ability to improve insulin sensitivity and glucose metabolism, key components of metabolic health that decline with age. It also plays a role in neurotransmitter function and maintaining cell membrane integrity.
Verdict
A safe, evidence-backed tool for improving insulin sensitivity and metabolic health.
HEALTHSPAN IMPACT
Moderate
RISK LEVEL
Low
EVIDENCE GRADE
A
MONTHLY COST
$5 - $15
Protocol
- For metabolic health, 2-4 grams of myo-inositol are taken daily, often split between two doses.
- A common evidence-based formulation uses a 40:1 ratio of myo-inositol to D-chiro-inositol.
Flags
- High doses (>12g/day) may cause mild gastrointestinal distress like gas or diarrhea.
- The 40:1 myo- to D-chiro-inositol ratio is considered optimal for metabolic benefits.
- Use with caution if taking diabetes medications due to potential blood sugar-lowering effects.
- Consult a physician if taking psychiatric medications, as inositol can affect neurotransmitter systems.