Back to All Reviews
#4 in Vitamins Third-Party Tested

Life Extension Optimized Folate (L-Methylfolate)

by Life Extension

"1700mcg DFE L-methylfolate — the bioactive folate for those with MTHFR variants who can't convert folic acid"

Amazon Rating
4.7/5
Reviews
6,200+
Price Range
$12-16
Servings
100 tablets
GMP CertifiedNon-GMO
Our Editorial Rating
8.4
Very Good
FormTablet
CategoryVitamins
SubcategoryL-Methylfolate (Active Folate)
View on Amazon

Overview

Life Extension Optimized Folate provides 1700mcg DFE of L-5-methyltetrahydrofolate (5-MTHF), the bioactive form of folate that bypasses the MTHFR enzyme. Up to 40% of the population has MTHFR gene variants that reduce the ability to convert synthetic folic acid into its active form. L-methylfolate is immediately usable by the body without any conversion needed. This is critical for methylation, homocysteine metabolism, neurotransmitter synthesis, and DNA repair. Life Extension uses Quatrefolic, a patented glucosamine salt of 5-MTHF with superior stability.

Key Ingredients

IngredientAmount
L-5-Methyltetrahydrofolate (Quatrefolic)1700 mcg DFE

Pros & Cons

What We Like

  • Bioactive L-methylfolate
  • Quatrefolic (patented, stable)
  • 100 tablets
  • 6,200+ reviews
  • Bypasses MTHFR variants

What Could Be Better

  • Premium over folic acid
  • May not be needed without MTHFR variant
  • 1700mcg DFE (high dose)
  • Single nutrient

Who Is This For?

Best For

  • MTHFR variant carriers
  • Those who can't convert folic acid
  • Methylation support
  • Homocysteine management

Not Ideal For

  • Those without MTHFR variants
  • Those wanting basic folic acid
  • Budget seekers
  • Those wanting comprehensive B-complex

Our Verdict

8.4/10 — Very Good

Life Extension Optimized Folate is the MTHFR solution — Quatrefolic L-methylfolate bypasses the genetic bottleneck that affects up to 40% of people. Essential for anyone who has tested positive for MTHFR variants.

Alternatives to Consider

No direct alternatives listed for this product yet.