Best Copper Supplements 2026: Cost per Effective Dose
Our pick for Copper: NOW Foods Copper Glycinate 3mg — 3mg elemental copper per 1 tablet, cGMP, $0.06/day. Our best-value pick.
Registry check · Copper
Does anyone independently verify Copper supplements?
1 of the 6 Copper products on this page is confirmed in NSF/ANSI 173: Thorne Copper Bisglycinate 2mg. Thorne Copper Bisglycinate 2mg does not show the mark on the listing, so the table’s certification column, which repeats the listing, does not show it either. For the others, the listing may name a certification, but we did not find it in a public registry — that is not evidence against them, only an absence of independent confirmation.
Certification is not a dosing guarantee. Across the whole catalogue, certified products reach the clinically studied dose 57% of the time and uncertified ones 71% — a gap too small to mean anything (Fisher p = 0.185). Read the Copper dose column either way.
The 6 products on this page checked against all 5,317 US NSF, USP and Informed Sport listings, 2026-08-25. Full method and limitations.
What Copper labels show
Priced per day, these copper products run $0.06 to $0.32 — a 5.3× gap between the cheapest and priciest copper here, across 6 brands.
All Copper Supplements Compared
| Product | Brand | Dose / Serving | Cost / Day | Certification (as labeled) | Pick | Buy |
|---|---|---|---|---|---|---|
| Bronson Copper Glycinate 3mg | Bronson | 3mg elemental copper / 1 tablet | $0.06 | None | Buy | |
| NOW Foods Copper Glycinate 3mg | NOW Foods | 3mg elemental copper / 1 tablet | $0.06 | cGMP | Best value | Buy |
| Solgar Chelated Copper 2mg | Solgar | 2mg elemental copper / 1 tablet | $0.08 | None | Buy | |
| Dr. Mercola Copper Bisglycinate 2mg | Dr. Mercola | 2mg elemental copper / 1 mini-tablet | $0.11 | None | Buy | |
| Pure Encapsulations Copper Glycinate 2mg | Pure Encapsulations | 2mg elemental copper / 1 capsule | $0.22 | NSF-audited GMP, hypoallergenic | Buy | |
| Thorne Copper Bisglycinate 2mg | Thorne | 2mg elemental copper / 1 capsule | $0.32 | TRAACS-chelate (Thorne-stated); no independent COA verified for this build | Buy |
In-Depth Copper Guides
Go deeper on copper — by goal, by form, and what the evidence actually supports:
Our picks
Best value: NOW Foods Copper Glycinate 3mg
3mg elemental copper per 1 tablet. cGMP. $0.06/day. 120 servings per container at $6.49.
The shelf · Copper
The Copper shelf is unusually consistent
Across 6 products from 6 brands, the cheapest day is Bronson Copper Glycinate 3mg at $0.06 and the priciest is Thorne Copper Bisglycinate 2mg at $0.32, a gap of 5.3×. With prices this close, which of these Copper products has been independently checked matters more than the price.
Method: the 6 Copper products above, compared on label facts, serving size, servings per container, form, price. Not a dosing recommendation.
How these 6 Copper products were ranked
1 of these 6 is confirmed in a certifier's registry — the only copper row where the claim is independently backed — and the rest are ranked on cost per day at the labeled serving. Commission does not enter it: the rate is the same whichever copper you buy. Full methodology.