Mineral
GTF Chromium (as Fermented Chromium Glycinate, Nicotinate, Glutamate)
Also known as: GTF chromium, glucose tolerance factor chromium, chromium polynicotinate, fermented chromium
GTF (Glucose Tolerance Factor) chromium is a bioactive form of chromium that supports glucose metabolism and insulin sensitivity. The fermented delivery system with glycinate and nicotinate ligands is designed to enhance absorption and biological activity.
Primary uses
- Glucose metabolism support
- Carbohydrate utilization
- Insulin sensitivity
- Blood sugar stability
How it works
- Enhances insulin receptor signaling
- Potentiates insulin action on muscle and adipose tissue
- Supports glucose transporter activity
- Cofactor for glucose tolerance factor complex
Dosage
- Typical range
- 200 mcg daily (Adequate Intake for adults; no specific RDA for pregnancy)
- Timing
- with meals preferred
- With food
- take with food to enhance absorption
- Duration
- throughout pregnancy if indicated for glucose support
- Special populations
- Pregnant women 200 mcg/day (based on AI); do not exceed 200 mcg/day in pregnancy due to limited data
Forms
- GTF chromium· 70/100
- chromium polynicotinate· 70/100
- chromium picolinate· 70/100
Safety
Contraindications
- Diabetes (requires medical supervision if adding beyond prenatal multivitamin)
Evidence notes
Moderate evidence for chromium in glucose metabolism; GTF form is theoretically more bioavailable than inorganic chromium salts, but direct RCT evidence is limited; fermented delivery method is proprietary with preliminary data; safe at typical prenatal doses.
Grade C: Mostly observational or small trials; mechanism is plausible but unproven at scale.
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