The supplement directory

20 g of grass-fed bovine collagen peptides per serving and nothing else, NSF Certified for Sport; the TikTok Shop and Amazon bestseller that set the category.

A slow-digesting micellar casein with 24 g of protein per scoop for bedtime or long gaps between meals; thick, filling and fairly priced.

A full 600 mg daily dose of organic KSM-66 ashwagandha in one capsule for about $0.25-$0.28 a day. Strong value; not for pregnancy or thyroid conditions.

Vega's sport protein, formerly Vega Sport Premium Protein: 30 g plant protein, tart cherry and a probiotic per scoop, NSF Certified for Sport.

An Informed Sport-certified, vegan pre-workout with 274 mg natural caffeine and 6.5 g citrulline, though its beta-alanine and creatine are under-dosed.

A 30 g vegan protein built for athletes: organic pea and bean proteins, NSF Certified for Sport, plus recovery botanicals and a probiotic.

1,000 mg of vitamin C with rose hips in a sustained-release tablet for about 6 cents a day; far more than most people need, but cheap and cleanly made.

The drugstore benchmark: one tablet with 24 nutrients near 100% DV, including iron, iodine and folic acid, for about six cents a day. No third-party seal.

Juice-style clear whey: 20 g protein in an 80-calorie, sugar-free scoop with Informed Choice certification, though foaming and flavor split reviews.

Single-ingredient bovine collagen with a full amino acid profile on the label, NSF Certified Gluten-Free; 11 g scoops make the dose flexible, and it is a TikTok Shop staple.

One capsule of 10 billion CFU Lactobacillus rhamnosus GG plus 200 mg inulin, with potency guaranteed to expiration, for about 60 cents a day.

A simple, well-dosed 200 mg Suntheanine softgel for calm focus and wind-down, at about $0.33 a day. Contains gelatin and coconut.

A plant-based omega-3 from microalgae with 195 mg EPA and 390 mg DHA per two softgels; a clean fish-free option, but you pay more per gram than for fish oil.

TikTok Shop's pastel-tub creatine for women: a proper 5 g of micronized monohydrate per scoop, but about $0.50 a serving with no named certification.

The budget pick: 20 g of grass-fed bovine collagen per serving for roughly a dollar on Amazon, with a full amino acid profile, though it lacks a named third-party certification.

A premium grass-fed whey isolate with 20 g of protein per 90-calorie scoop, NSF Certified for Sport status and a short, gum-free ingredient list.

A long-running Amazon favorite: 200 mg of fully chelated magnesium per serving that is easy on the gut, but the tablets are large and the full label dose exceeds the UL.

A TikTok Shop best-seller with solid citrulline and beta-alanine doses and licensed candy flavors, but caffeine ranges from 300 to 390 mg by flavor.

Amazon's No. 1 magnesium: 120 mg of magnesium glycinate per capsule in a minimal, allergen-free formula that is gentle on the gut but pricey per milligram.

A one-ingredient grass-fed whey concentrate: 25 g protein per 30 g serving with no sweeteners or additives; plain-tasting and best blended.

Informed Choice-certified fizzy tablets with 300 mg sodium and 1 g sugar per 16 oz: clean, affordable everyday and workout hydration, but light for salty sweaters.

A double-certified creatine stack with 5 g creatine plus 1.5 g HMB. The quality is excellent, but at about $1.67 a serving you pay a lot for add-ons with modest evidence.

A USP Verified, very low-cost drugstore fish oil; two large softgels supply only 600 mg EPA+DHA, and the label does not split EPA from DHA.

Cheap, strawberry-flavored melatonin that melts on the tongue. The best-selling 5 mg strength is more than most adults need; the 1 mg or 3 mg version is a smarter start.