• Organization: U.S. Department of Health & Human Services
• Updated: 2025-03-17

Methotrexate is a prescription oral tablet medication containing 2.5 mg of methotrexate sodium, manufactured by Alembic Pharmaceuticals. It acts as a folate analog metabolic inhibitor, interfering...

• html

• Organization: U.S. Department of Health & Human Services
• Updated: 2025-09-06

Background The pathophysiology behind spina bifida and other neural tube defects (NTDs) is unclear. Folic acid is one variable, but other factors remain. Studies suggest that substances...

• html

• Organization: U.S. Department of Health & Human Services
• Updated: 2025-09-06

Background Encephalomeningocele, especially in the frontoethmoidal region, is a form of neural tube defect which affects patients in Southeast Asia more commonly than in Western...

• html

• Organization: National Institute of Standards and Technology
• Updated: 2015-08-21 00:00:00

Standard Reference Material 3949 Folate Vitamers in Frozen Human Serum

• html
• pdf