In my own flying experience (and I fly a lot) I have noticed a dryness that gets worse on long flights. I have found that the essential oils used in this specific shampoo allows the hair to retain its natural oils and protect it from dryness. High altitudes affect natural hair, so as a precaution I use pro organic shampoo to massage the hair follicles before I take flight. A single portion is probably good too but when it comes to my hair I leave nothing to chance. I want to stop any dryness from occurring, as that can lead to dandruff and eventually to hair loss.
I highly recommend using an organic shampoo before flying. You need to protect your hair. When you get off that plane it will be the first thing anyone notices about you. Because I understand this, I have become a proud member of the 2 Minute Club. This allows for the Pro Organic line of shampoo and conditioner to be delivered directly to my doorstep, ensuring that I never run out.
The ingredients include Aloe Vera juice, apple seed extract, and red seaweed extract, all proven to prevent and fix hair damage. There are more incredible ingredients but you will have to read about them at 2MinuteClub.com, as the pilot is now ready to take off and I must stow my laptop either beneath my seat or in the overhead bin.
Safe travels my friends.