In a previous article I talked about how important it is to stretch the psoas muscle. This can cause many complications including back pain. To recap, most people have tight and shortened psoas muscles. The common activity of sitting causes our psoas to be consistantly shortened for extended periods of time.
The sale on March 31 is a wash sale. The wash sale period for any sale at a loss consists of 61 days: the day of the sale, the 30 days before the sale and the 30 days after the sale. (These are calendar days, not trading days.
Thank you for your inquiry. Typically it's recommended to wait at least one hour before eating. You could even go so far as to following the same post-op instructions for procedures such as an in-office one hour whitening and eat only clear/white foods/liquids for 24 hours to prevent any other possible staining. You're not at as much risk for staining with strips as you are with an office whitening, but you could try if wanted.