Especially for those with thin, limp hair, scalp treatments can help achieve a more voluminous look by deeply cleansing the scalp and encouraging follicle growth. That’s exactly what Rene Furterer’s Complexe 5 Stimulating Plant Concentrate does, according to reviewers who have tried it. This scalp serum treatment should be the first thing you put on your hair before continuing the rest of your hair care routine, and shoppers say it has made their thin hair look “noticeably thicker.” To buy: $50; renefurtererusa.com. To clarify and soothe your scalp, the Complexe 5 treatment uses key ingredients like orange peel oil and lavender oil that will gently clean your scalp without irritating it. Orange peel oil has anti-inflammatory properties to protect your skin from photo-aging signs, while lavender oil also has anti-fungal and antibacterial properties to soothe your skin, fight infections, and avoid clogging pores. Both of them work to ensure that your scalp is as fresh and free of any excess oils or dirt that can lead to an itchy, uncomfortable head of hair. Rene Furterer recommends using the Complexe 5 serum once or twice a week only, and to leave it on your scalp for 10 to 15 minutes before showering off. If you stick with it, you’ll have “fuller and thicker” hair than ever before, shoppers say. It is “absolutely wonderful” for making hair look healthier and smoothing out strands, said one reviewer, while another wrote that their scalp “loves this” for giving so much body to their thin hair. Others even add that it’s a “healthy scalp staple” that “everyone needs,” and is a “magic in a bottle” for their scalp. Another wrote: “This product made a huge difference within weeks and completely turned my hair and scalp mess around.” Although $50 might sound pricey for a scalp serum, shoppers said that you only need a few drops for your hair each week, so you can savor the treatment for months. Pick up Rene Furterer’s Complexe 5 treatment now to add it to your haircare routine.