Folate is the natural, active form of vitamin B11. Quatrefolic® is a patented, stable and directly usable variant of this form, in contrast to synthetic folic acid which must first be converted.

Methylcobalamin is an active form of vitamin B12, which can be used directly in food supplements. This form is often chosen because of its stability and high bioavailability.

Yes, this supplement contains a small amount of iron (2.1 mg per capsule), in the form of iron fumarate. This is a mild, well tolerated form that is often used in food supplements.

L-tryptophan is an amino acid that belongs to the essential amino acids. This means that it is not produced in the body and must be supplemented through diet or supplements.

L-tryptophan is naturally found in protein-rich foods such as milk, cheese, eggs, nuts, seeds, bananas, legumes and oatmeal.