After 28 days of dietary supplementation with 300 mL/day of sparkling wine, cis- and trans-resveratrol-3-O-glucuronides were found in the urine of all participants, whereas only very low concentrations of these metabolites were detected in the urine after the washout periods
and the gin period.
A 1-week washout period
followed, after which the groups were crossed to the other therapy (Gut 2003;52:1323-6).
Because there was no washout period
between interventions, this implied up to 8 consecutive months of reduced riboflavin intake in 84 subjects (4).
Sham and magnet treatments were separated by a one-week washout period
In Part 2, 92 continuing subjects received placebo during a 30-day, single-blind washout period
, followed by re-randomization to divided daily doses of either 50 mg or 300 mg for 24 weeks.
After a 3-day washout period
, each person received the alternate treatment for an additional 4 weeks.
The participants consumed the snack foods for four-week intervals with a four-week washout period
between the three test periods.
The participants were randomized to receive capsules with olive leaf extract (OLE) or placebo for 12 weeks, crossing over to other treatment after a 6-week washout period
This will be followed by a washout period
and then crossover to receive the product that was not initially received.
All met diagnostic criteria for MDD according to the DSM-IV-TR, and they all underwent a washout period
of at least 2 weeks, a 1-week screening period, and an 8-week double-blind treatment period.
These patients were randomly assigned to undergo either CPAP or sham CPAP for 3 months, followed by a washout period
of 1 month.
Ten adult African penguins were used in each of these trials, with a 2-wk washout period