I purchased this Eve Hansens Hyaluronic Acid as part of a three piece set on Amazon. It included a Vitamin C + E serum and Retinol serum for $30. Link for the set is down below.
Eve Hansen Naturals is a brand I discovered through Instagram. They are a brand geared towards being natural. This serum is housed in a dropper style bottle and is a milky liquid. Like many other hyaluronic acid serums, it works well. Hyaluronic acid acts as a humectant to draw moisture back to the skin. Perfect for winter, but also for any season. I generally mix and combine this with other serums. I look forward to trying other products from the line.
Where to buy: Amazon (link), Eve Hansen Naturals (link)