Phase 2: Consists of a 28-day study period, with each subject receiving a single daily observed dose of study product beginning on Day 0. Day 0 can be scheduled on either Mondays or Tuesdays, once continued eligibility is confirmed. Target scheduling will have Phase 2 begin within 2 weeks of completing Phase 1, but could be extended up to 28 days as clinic availability dictates. Participants will return to the clinic daily for dosing, and for hair and blood sampling on Days 3/7/14/21/28 days post-dose. Adverse events will be assessed at every visit. Safety labs will be drawn at the midpoint, and at the end of the study phase, and at any time indicated due to adverse events. These visits should last less than 30 minutes. Dosing only visits should last less than 5 minutes.