The purpose of the study is to assess the relative bioavailability of two Magne-B6 preparations, in fasting conditions.

Inclusion Criteria:

1. Male or female participants, between 18 and 45 years of age, inclusive.

2. Body weight between 50.0 and 100.0 kg, inclusive, if male, and between 40.0 and 90.0 kg, inclusive, if female, body mass index (BMI) between 18.0 and 30.0 kilogram per square meter (kg/m^2), inclusive.

3. Females of childbearing potential (pre-menopausal female biologically capable of becoming pregnant) or not documented post-menopausal (menopause is defined as being amenorrheic for at least 1 year with plasma follicle stimulating hormone [FSH] level >30 International units per liter [UI/L]) who are sexually active with a male partner must be willing to use one of the following acceptable contraceptive methods throughout the study and for 30 days after the last IMP administration:

   • Intra-uterine contraceptive device placed at least 4 weeks prior to IMP administration.
   • Male condom with intravaginally applied spermicide starting at least 21 days prior to investigational medicinal product (IMP) administration.
   • Hormonal contraceptives starting at least 4 weeks prior to IMP administration and must agree to use the same hormonal contraceptive throughout the study.
   • Sterile male partner (vasectomized since at least 6 months).
   • Abstaining from sexual intercourse.

4. Male participant, whose partners are of childbearing potential (including lactating women), must accept to use, during sexual intercourse, an adequate contraception for study period duration or abstaining from sexual intercourse.

5. Presenting normal magnesemia (0.65-1.05 millimolar [mM]).

6. Presenting normal plasma level of vitamin B6 (20-50 nanomolar [nM]).

7. Certified as healthy by a comprehensive clinical assessment (detailed medical history and complete physical examination).

8. Vital signs after 10 minutes resting in supine position within the following range:

   • Systolic blood pressure (SBP): 100 - 130 millimeters of mercury (mmHg)
   • Diastolic blood pressure (DBP): 60 - 90 mmHg
   • Heart rate (HR): 60 -90 beats per minute (bpm).

9. Standard 12-lead electrocardiogram (ECG) parameters after 10 minutes resting in supine position in the following ranges: 120 milliseconds (ms)\

Qualified researchers may request access to patient level data and related study documents including the clinical study report, study protocol with any amendments, blank case report form, statistical analysis plan, and dataset specifications. Patient level data will be anonymized and study documents will be redacted to protect the privacy of trial participants. Further details on Sanofi's data sharing criteria, eligible studies, and process for requesting access can be found at: https://vivli.org