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Vitamins & Ingredients
Biotin, rosemary oil, collagen
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1:02A Dermatologist's 18 Months on Xtressé, and Why She Chose It
Dermatologist and hair loss specialist Dr. Leena Ramani has taken Xtressé for about 18 months. She shares what she's noticed, including less shedding and new growth, and walks through the ingredients and the causes of hair loss she connects them to.
Biotin Gummies: What Higher Doses Mean for Hair and Lab Tests
Higher-dose biotin gummies have no established hair benefit in people who are not biotin deficient, and the research behind biotin for ordinary shedding is limited. Biotin supplements can also interfere with some blood tests, which is the part worth knowing before your next blood draw. This article covers what the numbers on a label mean, what studies show, and what to tell your clinician and lab.
10 min readBiotin and Collagen for Hair: What the Evidence Shows
Research on biotin and collagen for hair is thinner than the marketing around collagen and biotin supplements suggests. For biotin, there are few high-quality studies in people without a deficiency, and some newer research tests specific formulas that cannot show what ordinary biotin does on its own. For collagen, the most consistent findings concern skin, and even those are mixed. Results for skin or nails do not show that hair grows back. Eating enough food does not automatically mean every nutritional need is being met. A clinician can say whether a shortfall is likely for you, which is a better starting point than guessing with a gummy. Here’s what each ingredient is, the difference between biotin and collagen, what the studies measured, and where the evidence stops.
3 min readWhat Causes Hair Loss in Women? What a 2025 Dermatology Review Found
If your hair is thinning, you're in good company, and there may be more than one reason behind it. A 2025 review by a team of dermatologists points to five root causes: hormones, inflammation, low nutrients, aging and oxidative stress. The authors say looking at these root causes can help explain why hair thins. Hair loss is common. The review notes that more than half of postmenopausal women and up to 40% of otherwise healthy women suffer from hair loss. According to the review, female pattern hair loss is the most common type. Others include shedding (telogen effluvium), alopecia areata and scarring types. The authors note that too little of some nutrients can contribute to hair loss, and so can too much. The review also notes that high doses of biotin may interfere with some lab tests.
Hair Loss While Taking a GLP-1: What Women Should Know
You didn’t start Zepbound, Wegovy, Mounjaro, or Ozempic, expecting to lose hair. Hair loss while taking GLP-1 is common enough to take seriously, and there are ways to handle it without giving up the results. Hair loss is a reported side effect of GLP-1 medicines. What's behind it can differ from person to person, and the sources reviewed here don't show how to stop hair loss from GLP-1 with any one routine, so the useful next steps are questions you may want to bring to a prescriber or dermatologist. This article covers what the labels report, what drives the loss, and what to ask and when to get help.
4 min readRosemary Oil for Hair: What the Research Says
Does rosemary oil grow hair? Research on rosemary oil for hair is limited to one small human study. That six-month trial included men with pattern hair loss, a 2024 dermatology review reports. Doctors aren't sure how rosemary oil might affect hair, UPMC notes.
