How can I be assured this is a authentic ZO skin health product?

I don’t buy it anymore just too expensive and it was just all right. I hope the jar that I got was real but I can’t be sure.

What are the ingredients?

This is from the ZO Skin website: Water (Aqua), Dimethicone, Stearic Acid, Ethylhexyl Isononanoate, Glycerin, Shea Butter Oleyl Esters, Squalane, Caprylic/Capric/Myristic/Stearic Triglyceride, Hydrogenated Coco-Glycerides, Hydrolyzed Vegetable Protein, Arachidyl Alcohol, Cetyl Alcohol, Helianthus Annuus (Sunflower) Seed Oil Unsaponifiables, Biosaccharide Gum-4, Retinol, Retinyl Palmitate, Glycine Soja (Soybean) Sterols, Lecithin, Linoleic Acid, Evodia Rutaecarpa Fruit Extract, Epilobium Angustifolium Flower/Leaf/Stem Extract, Polysorbate 20, Caprylic/Capric Triglyceride, Trehalose, Ceramide 2, Phospholipids, Glyceryl Stearate, Behenyl Alcohol, Polyacrylate-13, Polyisobutene, PEG-100 Stearate, Arachidyl Glucoside, Micrococcus Lysate, Tetrasodium EDTA, Phenoxyethanol, Caprylyl Glycol, Ethylhexylglycerin, Hexylene Glycol, Butylene Glycol.