Chemicals in our Make up - Part 1: Foundation

This post was a request from Bibil, and inspired by one of my earlier posts about Eczema and cosmetics products:

What are the chemicals in our make up?

Well, although I found many articles saying that there is no regulation, actually there is a fairly well controlled organisation that bases its research on many reviews published in scientific journals.

Because the subject is endless and for the sake of easy reading, I will concentrate on the essentials such as: Foundation - Eye shadow - Mascara - Lipstick which I will separate into different posts, making it a mini serie. Today's post will be:

Foundation

Foundation is composed of different phases that are mixed together:

Vitamin D and the Winter Blues

This was a request from Bibil: Why do we feel depressed during winter?

Winter blues, called SAD for Seasonal Affective Disorder, is a seasonal depression and mood variation known to be related to how much sunlight you receive. Your mood is influenced by a complexed relationship between sunlight, melatonin (sleep hormone) and serotonin (awake AND good mood hormone).

Winter Blues 

As the dark hours increase during winter, our body increases levels of melatonin, leaving less hours for the body to increase its serotonin levels. Whereas during summer, serotonin levels increase when you are exposed to bright light making you feel in a better mood!

Indeed it is well known that bright light therapy can bring quick benefits to people with depression or SAD because light affects the balance between melatonin and serotonin