My evenings have completely changed
I used to be useless after 7pm. Now I have energy into the evenings and actually enjoy time with my family rather than just surviving until bedtime. Stack has genuinely changed my quality of life.
Nour M.
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Vitamin1,000mcg
Biotin
HAIR, SKIN & NAIL VITALITY
Dairy freeGluten freeSoy freeGMO free
$6.99/mo
30-day supply
Key Benefits
1
Supports healthy hair growth and strength
2
Promotes strong nail formation
3
Supports skin cell renewal and health
4
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.
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3rd Party Tested
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Doctor Formulated
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cGMP Certified
The Details
Why you'll love it
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
Clinical Evidence
Key studies supporting Biotin, from peer-reviewed journals.
1
Biotin lowers blood sugar, cholesterol, and triglycerides in diabetics
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
What's Inside
Third-Party Tested
Every batch is independently tested by ISO-17025 accredited labs for purity, potency, and contaminants.
Doctor Formulated
Designed by healthcare professionals using evidence-based research and clinical expertise.
cGMP Certified
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
changed my whole routine tbh
used to take like 5 different supplements every morning and always forgot at least two of them. now i take one stack pack and that's it. so much simpler. and the results are actually better. wild.
Hazel B.
The value proposition is actually excellent
I calculated what I was spending on separate supplements, gym supplements, and energy drinks before Stack.
Tim A.
Simple, smart, and it actually works
The packaging is some of the nicest I've seen in wellness. But beyond aesthetics, the product delivers. My energy throughout the day is more stable and I'm recovering faster from workouts. I was genuinely skeptical.
Ashley N.
The inflammation reduction has been significant
I suffer from low-grade chronic inflammation and it affects everything - energy, mood, joint comfort. Stack's personalized formula has noticeably reduced these symptoms over three months. The targeted approach is clearly more effective than generic options.
Eric T.
My husband noticed before I did
About six weeks in my husband said I seemed more like myself - more energy in the evenings, less irritable, sleeping better. I hadn't even consciously registered how much had changed until he said it.
Amara S.
Personalized for you
Not sure if Biotin is right for you?
Take our 2-minute Health Assessment and let our AI build your personalized stack — every supplement chosen for your specific goals.
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