NOW Zinc Glycinate vs Thorne Zinc Picolinate 30 mg
Informational comparison of label data and cost — not medical advice. Prices are live per-serving figures; formulas are each brand’s published Supplement Facts.
NOW Foods Zinc Glycinate 30mg (120ct) and Thorne Zinc Picolinate 30mg (60ct) both deliver 30 mg of elemental zinc, but as different chelates: NOW uses glycinate, Thorne uses picolinate. Both are well-absorbed organic forms, and neither has convincingly beaten the other in humans. Thorne adds NSF Certified for Sport at roughly four times the cost per day.
The numbers, side by side
| NOW Foods Zinc Glycinate 30mg (120ct) | Thorne Zinc Picolinate 30mg (60ct) | |
|---|---|---|
| Form | Zinc glycinate (chelated) | Zinc picolinate (chelated) |
| Dose / serving | 30 mg | 30 mg |
| Serving size | 1 softgel | 1 capsule |
| Servings / container | 120 | 60 |
| Third-party cert | None | NSF Certified for Sport |
| Price | $11.01 | $20.00 |
| Cost / day | $0.09 | $0.34 |
| Buy | Check price → | Check price → |
Prices are live Amazon buy-box figures ÷ pack serving count, last reviewed August 1, 2026. Formula details are each brand’s published Supplement Facts panel.
The real difference
Zinc glycinate and zinc picolinate are both organic chelates, chosen over zinc oxide because they absorb better and sit more easily on the stomach. Comparative human data between the two is thin and does not establish a clear winner, so treating them as broadly equivalent at the same elemental dose is the honest reading. Both here are 30 mg elemental.
The dependable difference is NSF Certified for Sport on the Thorne product, which screens for banned substances alongside confirming label accuracy. NOW carries no third-party mark. At roughly four times the cost per day, that certification is most of what you are buying.
Who each one is for
Choose NOW if you want 30 mg of chelated zinc at the lowest cost per day and you are not drug-tested.
Choose Thorne if you compete in a tested sport and need NSF Certified for Sport verification.
Do not take 30 mg indefinitely sustained high-dose zinc induces copper deficiency. The adult upper limit is 40 mg a day from all sources, and 30 mg is a short-course dose, not a permanent one.
Our picks
30 mg elemental zinc as glycinate, no third-party certification. $0.09/day.
30 mg elemental zinc as picolinate, NSF Certified for Sport. $0.34/day.
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Frequently asked questions
Is zinc glycinate or zinc picolinate better?
Both are organic chelates that absorb well and are gentler on the stomach than zinc oxide. Comparative human evidence between them is limited and does not clearly favour either, so at the same elemental dose they are best treated as equivalent.
Is NOW or Thorne zinc better?
Both deliver 30 mg of elemental zinc as a chelate. Thorne is NSF Certified for Sport; NOW carries no third-party certification and costs roughly a quarter as much per day. Unless you need the certification, the cheaper product delivers the same elemental zinc.
Can you take 30 mg of zinc every day?
Not indefinitely. Zinc competes with copper for absorption, and sustained high intakes cause copper deficiency. The tolerable upper intake level for adults is 40 mg a day from all sources, so 30 mg is a short-course dose rather than a long-term daily habit.
Related
- Zinc forms compared — glycinate, picolinate, citrate and oxide
- Best zinc supplements — ranked by cost per elemental mg
- All zinc products — ranked by cost per dose
Sources
- NIH Office of Dietary Supplements. “Zinc — Health Professional Fact Sheet.” RDA and tolerable upper intake level. ods.od.nih.gov
- NSF. “Certified for Sport” — what the programme tests. nsfsport.com
- Product labels and live Amazon pricing for both products, reviewed August 2026.