BTN Ultra is a supplement containing ingredients such as biotin, N-acetylcysteine, zinc, selenium, copper, and calcium pantothenate, according to the
product listing. It may help if you genuinely have a nutrient deficiency, but it is
not a proven general cure for hair loss. Recent systematic reviews find that supplements have variable and limited benefit unless a relevant deficiency is present, such as iron, vitamin D, zinc, or another nutritional problem (
2025 review;
2024 review).
Get prompt medical review if you have sudden patchy bald spots, scalp redness/scaling/pain, eyebrow loss, or marked hair shedding with fatigue, weight change, or heavy periods.