Hair, Skin & Nails

Biotin at four label strengths: 1,000, 2,500, 5,000 and 10,000 mcg

Four of the nine in-stock listings on this shelf name biotin in the title, and no two share a strength. Nature Made Biotin 1000 mcg Softgels (120 count, $13.18) is the lowest-priced item among the nine. Nature Made Biotin 5000 mcg Softgels keeps the same 120-count bottle at $23.99. Bronson Biotin 10000 mcg Capsules (120 ct, $33.45) is the strongest of the four. Nature Made Hair, Skin & Nails Gummies with Biotin 2500 mcg is the only gummy among the nine and, at $17.84 for 150 count, the only one of the nine sold as a 150-count pack. Biotin is commonly taken for hair and nail support; compare the mcg figure, not the bottle.

Two Bronson zinc options: 30 mg glycinate or 50 mg complex

Zinc appears on two of the nine listings, both from Bronson. Bronson Zinc Glycinate 30mg is the chelated glycinate form, 120 count, $34.00. Bronson Zinc 50mg Complex Capsules is labeled 50 mg, comes 100 to the bottle and sells for $33.45, the same price as Bronson's 10,000 mcg biotin and the only price that repeats among the nine listings. Zinc is a common supporting mineral on hair, skin and nails panels; if a multivitamin is already in your routine, total the zinc on both labels and talk to your healthcare provider before stacking.

The $50-plus tier: grape seed, reduced glutathione and a 540-capsule multivitamin

Three of the nine listings are priced above $50, and none of the three is biotin. Swisse Grape Seed Extract with Vitamin C Capsules is $56.00 and comes as 300 tablets, the only tablet format among the nine. NatureBell Glutathione Reduced 1000mg is 240 count at $61.80; glutathione is commonly taken as an antioxidant, and "Reduced" is the form named on the label. Ekkovision Multivitamin 540 Capsules 180 Servings is the highest price of the nine at $84.99 and, at 540 capsules, the largest bottle by count among the nine; its title lists 180 servings.

Nine listings, five brands, four price bands

The nine listings split one, two, three and three across the under-$15, $15-30, $30-50 and $50+ bands, with $13.18 at the low end, $84.99 at the top and $33.45 as the median. Five brands: Nature Made and Bronson with three listings each, Swisse, NatureBell and Ekkovision with one apiece. Capsules lead the format count (five capsule, two softgel, one gummy, one tablet), and 120 is the count on four of the nine bottles. Six of the nine are tagged Women's Health and five Men's Health; all nine also sit in Health & Vitamins, and five overlap with Men's Health. Gummy or capsule? See Do Gummies Work as Well as Capsules?. These statements have not been evaluated by the Food and Drug Administration; these products are not intended to diagnose, treat, cure or prevent any disease.