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Here, we quantified the urinary levels of various estrogen precursors and metabolites in healthy young women who were using COCs containing drospirenone (DRSP) and ethinyl estradiol (EE) ( n = 24) and controls ( n = 25) via liquid chromatographytandem mass spectrometry (LCMS/MS)

NAD+ vs NMN vs NR (and IV vs SubQ) NAD+ Delivery Comparison Feature Mechanism NAD+ Injection (SubQ) Direct coenzyme delivery NAD+ Infusion (IV) Direct coenzyme delivery Oral NMN NAD+ precursor (converted in vivo) Oral NR (Niagen) NAD+ precursor (converted in vivo) Feature Typical research-planning dose NAD+ Injection (SubQ) 50-100 mg, 2-3x/week NAD+ Infusion (IV) 250-1,000 mg per session Oral NMN 300-600 mg/day Oral NR (Niagen) 300-1,000 mg/day Feature Speed to systemic NAD+ rise NAD+ Injection (SubQ) Hours NAD+ Infusion (IV) Minutes to hours Oral NMN Days to weeks Oral NR (Niagen) Days to weeks Feature Strongest human evidence NAD+ Injection (SubQ) Limited NAD+ Infusion (IV) Pilot PK and historical case reports Oral NMN Growing RCT base Oral NR (Niagen) Strongest RCT base Feature Convenience NAD+ Injection (SubQ) At-home injection technique required NAD+ Infusion (IV) Clinic visit, 2-4 hour infusion Oral NMN Daily oral capsule Oral NR (Niagen) Daily oral capsule Feature Regulatory status NAD+ Injection (SubQ) Not FDA-approved

Its too risky, especially given the lack of research in people

doi: 10.1016/j.ijbiomac.2024.134860 223 ZhouZ.SunB.YuD.ZhuC

Briefly, small sliced stromal tissues were transferred in a 20 ml digestion solution containing HBSS-Hepes + Antibiotic and 200 l collagenase (0.1%) and digested for 25 minutes (min.) on a thermal shaker at 37 C