Results · Side-by-side price comparison
Amazon eBay

Live Price Comparison for "weight loss supplements"

Compare live weight loss supplements prices across Amazon, eBay, AliExpress, and TEMU — no account, ever.

All Stores 0
Amazon 0
eBay 0
TEMU 0
️ AliExpress 0
DHgate 0
Banggood 0
Direct Vendor 0
Price:
–
Sort by:
Showing results for "weight loss supplements" across all partner stores

Compare live prices on weight loss supplements across Amazon, eBay, AliExpress, and partner merchants. Supplement basics for most adults: vitamin D3 (2000-5000 IU — universal deficiency in northern climates), magnesium glycinate (200-400mg, sleep and muscle calm), omega-3 EPA+DHA (1-2g, brain and heart). For athletes: creatine monohydrate (5g daily, the most-studied performance supplement), whey protein to hit 0.7-1g/lb bodyweight. For sleep: 1-3mg melatonin (NOT 5-10mg — too much causes grogginess), magnesium, glycine. Skip: greens powders (underdosed), 'detox' anything, multivitamins (better to test for specific deficiencies). Quality brands: Thorne, Pure Encapsulations, Life Extension, NOW Foods — all third-party tested. Click any card to open the seller's product page; we earn a small affiliate commission at no extra cost to you.

View as:
Dog Gravestone Dog Tombstone Dog Loss Gifts
Dog Gravestone Dog Tombstone Dog Loss Gifts
Got an Amazon, eBay, AliExpress, or TEMU product link? Paste it to compare across our partner stores (beta)
We compare prices across Amazon, eBay, AliExpress, TEMU, and our partner merchants. Heuristic title extraction works best on Amazon and eBay URLs.

Frequently asked questions about weight loss supplements

What supplements do I actually need?

Most adults: Vitamin D3 (universal deficiency), magnesium glycinate (sleep + muscle), omega-3 fish oil (brain + heart). Add B12 if vegetarian/vegan. Skip multivitamins — underdosed across the board. Skip 'greens powders' — underdosed compared to actual vegetables. Get bloodwork first to confirm deficiencies.

Where to buy supplements safely?

Costco (Kirkland brand — best value + USP-verified). NOW Foods, Thorne, Pure Encapsulations, Life Extension (premium third-party tested). Amazon for established brands with hundreds of verified reviews. Avoid: random Amazon brands, MLM supplements (Plexus, Herbalife — overpriced + unregulated), 'detox' anything.

Are subscription supplement boxes worth it?

Generally no. Ritual ($30/mo) — pretty packaging but underdosed Vitamin D + iron. Care/of ($50+/mo) — gimmicky quiz, basic vitamins at premium prices. Better to identify your specific needs (bloodwork → targeted supplementation) than subscribe to random multi-pack curation.

How do I know if a supplement is high quality?

Look for third-party testing certifications: USP, NSF, ConsumerLab. Brand transparency about sourcing + manufacturing. Specific dosages on label (not 'proprietary blend' which hides amounts). FDA Good Manufacturing Practice (GMP) compliance. Reputable brands: Thorne, Pure Encapsulations, Life Extension, NOW Foods.

Can supplements interact with medications?

Yes, frequently. St. John's Wort + birth control or SSRIs = dangerous. Vitamin K + blood thinners = interference. Calcium + thyroid medication = absorption blocked. Magnesium + some antibiotics = interference. Always tell your doctor + pharmacist all supplements you're taking. Drugs.com has free interaction checker.

When's the best time to take supplements?

Fat-soluble (A, D, E, K, omega-3): with meals containing fat. Iron: alone, on empty stomach if tolerable (calcium blocks absorption). B-complex: morning (can cause insomnia in evening). Magnesium: evening (relaxation). Most multivitamins: with food to prevent stomach upset. Consistency matters more than perfect timing.

Compare:
Affiliate Disclosure: Links may include affiliate tracking. We may earn a small commission at no extra cost to you.