I have just read Anyas link
www.huffingtonpost.com/2015/03/03/what-is-face-serum_n_6761412.html
We really need to read what is said on the advert carefully there are key words here.
Face serums are lightweight moisturizers that penetrate deeper to deliver active ingredients into your skin. "By leaving out many of the heavier ingredients that are found in traditional moisturizers, [face serums] contain a much higher proportional concentration of active ingredients," says Dr. Carlos A. Charles, founder and medical director of Derma di Colore in Chelsea.*
Celebrity makeup artist Kristofer Buckle believes that using a serum regularly can give your skin a firmer, smoother texture, make pores appear smaller and increase moisture levels.*
The key words which here are Dr Carlos says and Kristofer Buckle believes these help. There is no mention of any scientific studies that back up these claims that these potions actually work any better than other simpler and less expensive products
Sanctuary Spa's Therapist's Secret Facial Oil and it's fabulous.
The main ingredient is Sunflower oil and various other oils.
Ingredients: Helianthus Annuus (Sunflower) Seed Oil, Rosa Canina Fruit Oil, Triticum Vulgare (Wheat) Germ Oil, Simmondsia Chinensis (Jojoba) Seed Oil, Boswellia Carterii Oil, Rosa Centifolia Flower Water, Geraniol, Citronellol, Linalool, Rosa Damascena Flower Oil, Limonene.
Read more at www.boots.com/en/Sanctuary-Spa-Therapist-Secret-Facial-Oil_1711787/#GiCEtwS7s93hI5BQ.99
This product sells at £17:50 for 30 mls.
A litre of sunflower oil in Asda is £2.94.
Extortionate comes to my mind.