HAIR, SKIN & NAIL VITALITY
30-day supply
Key Benefits
Supports healthy hair growth and strength
Promotes strong nail formation
Supports skin cell renewal and health
Aids in energy metabolism of fats and carbs
Wellness Goals
Recommended Dose
1,000mcg
Take one 1,000mcg capsule daily with food. Biotin is water-soluble, so your body will excrete any excess. Important note: high-dose biotin can interfere with certain lab tests (including thyroid and cardiac panels), so inform your healthcare provider of biotin supplementation before blood work.
Get your personalized dose3rd Party Tested
Doctor Formulated
cGMP Certified
The Details
If you've ever searched for supplements for hair, skin, or nails, biotin was probably the first result. And for good reason — biotin is a key coenzyme in keratin production, the structural protein that makes up your hair, skin, and nails. When biotin levels are low, the effects show up fast: brittle nails, thinning hair, and dry, flaky skin.
Clinical studies show that biotin supplementation improves nail thickness and reduces splitting in people with brittle nails, and supports hair growth rate and thickness. It's particularly effective when hair thinning or nail fragility is related to nutritional deficiency, which is more common than most people realize — especially in those who diet frequently, take certain medications, or have digestive issues that affect nutrient absorption.
Beyond beauty benefits, biotin is essential for macronutrient metabolism. It serves as a cofactor for carboxylase enzymes that help break down fats, amino acids, and glucose. At 1,000mcg, this provides a meaningful dose well above the daily value to support both cosmetic and metabolic benefits.
Research
Key studies supporting Biotin, from peer-reviewed journals.
Influence of biotin intervention on glycemic control and lipid profile in patients with type 2 diabetes mellitus: a systematic review and meta-analysis — 2022
Study titles are simplified for readability. Provided for informational purposes — not medical advice.
Transparency
Every batch is independently tested by ISO-17025 accredited labs for purity, potency, and contaminants.
Designed by healthcare professionals using evidence-based research and clinical expertise.
Manufactured in cGMP & UL certified, FDA-registered facilities with a flawless inspection record.
As with any natural health product, consult your healthcare practitioner. Store in a cool, dry place. Keep out of reach of children. Discontinue use immediately if you experience an adverse event.
What people say
Really good supplement brand. The daily pack format is so convenient and I've been 100% consistent because of it. The quiz was genuinely thorough. Knocked one star off because I'd love the option to add or remove individual supplements as I learn more about my body.
I've tried so many supplements and honestly nothing has worked like this. The quiz is actually thorough and the results show it. Energy is UP, recovery is UP, sleep is SO much better. Can't believe it took me this long to find this brand.
Three weeks in and I already feel the difference. My morning energy is COMPLETELY different. No more dragging myself out of bed. The personalization through the quiz is what makes it work — it's not just a generic multivitamin. Stack actually thought about what MY body needs.
I've been on a health optimization journey for about three years and have tried what feels like every supplement brand on the market. Most of them are either generic multivitamins dressed up in pretty packaging, or they're so specific that you need to be a nutritionist to understand what you're actually taking. Stack sits in a completely different category. The quiz is the first thing that impressed me. It asks genuinely intelligent questions — not just 'how old are you and what's your gender' but questions about your diet, your sleep patterns, your stress levels, your exercise frequency. It felt like a real consultation rather than a data collection exercise. The pack that arrived was clearly personalized to my answers. After six weeks, the improvements have been consistent and measurable: better sleep quality, more stable energy throughout the day, and noticeably faster recovery after my runs. My partner commented that I seemed more 'on' in the evenings rather than crashing after dinner. The daily pack format is brilliant for compliance — I've been 100% consistent because the habit is so frictionless. One pack, done, every morning. No bottles, no measuring, no forgetting half of them. Genuinely one of the best health investments I've made.
My focus at work has been sharper and I'm waking up without that groggy feeling I used to have every morning. Told two friends about Stack already. Customer support was also really helpful when I had a question about one of the ingredients.
honestly wasn't sure about it at first but three weeks in and i'm so glad i tried it. energy is way better, i'm sleeping properly for the first time in months. the quiz was really detailed which gave me confidence it was actually personalized. would 100% recommend.
Personalized for you
Take our 2-minute Health Assessment and let our AI build your personalized stack — every supplement chosen for your specific goals.
Take the Health AssessmentProduct images are for illustrative purposes and may not represent actual packaging.
