NOW Foods Zinc Glycinate 30 mg Review

No — it's the other top-tier chelate. NOW ships zinc bisglycinate (150 mg of Albion zinc bisglycinate per softgel = 30 mg elemental zinc); Pure Encapsulations Zinc 30 ships zinc picolinate at the same 30 mg elemental. The Maares & Haase 2020 absorption data (PMID 32183116) puts both chelates at ~25-30% absorbability, with no head-to-head trial separating them. What you give up here is (1) clinician-grade hypoallergenic excipient discipline — NOW's softgel carries gelatin, glycerin, carob, beeswax and soy lecithin plus 250 mg cold-pressed pumpkin seed oil, while Pure Encapsulations uses only plant fiber and a vegetarian capsule, and (2) brand positioning that integrative-medicine clinicians stock by default. For 95% of users neither matters, and NOW's 30+ year QC track record means you're not gambling on a counterfeit.

Thorne carries NSF Certified for Sport on every batch — each lot tested against 270+ WADA-banned substances at an NSF-accredited lab. That certification economics is the $5/month premium. NOW Foods leans on captive in-house QC labs at their Bloomingdale, IL facility (genuinely strong — among the most extensive captive testing operations in the industry, 30+ years of operational consistency) but doesn't run NSF Sport certification. For drug-tested athletes (NCAA, IOC, NFL, MLB, NHL), Thorne is mandatory. For non-athletes who don't specifically need banned-substance certification, NOW delivers the same elemental zinc at $9/month versus Thorne's $14. The molecule is identical at the absorption level.

No — the softgel shells are bovine gelatin. NOW makes a separate vegcap zinc product, but this specific Zinc Glycinate SKU is gelatin-shelled. If you're vegan, vegetarian, or follow religious dietary restrictions on bovine products, switch to Thorne Zinc Picolinate (#1, vegetarian capsule), Pure Encapsulations Zinc 30 (#2, vegetarian capsule), or Garden of Life Vitamin Code Raw Zinc (#4, certified vegan). The bisglycinate chelate itself is plant-compatible — only the shell is the problem.

Up to 12 weeks safely at 30 mg/day. Beyond that window, add 1-2 mg copper bisglycinate daily to prevent depletion. Zinc and copper compete for the same intestinal DMT-1 transporter, and chronic high-dose zinc gradually depletes serum copper — gradual at 30 mg/day over months, clinically meaningful at 50+ mg/day within 4-6 weeks. Practical protocol on NOW's 120-softgel bottle: run 8-12 weeks of solo dosing for active repletion (using 60-90 softgels), retest serum zinc, drop to 15 mg/day maintenance, add copper if continuing past 12 weeks. The 120-cap bottle gives you flexibility — you don't need to commit a full 4-month run on a single dose level.

Roughly 2× the absorption. Maares & Haase 2020 (PMID 32183116) catalogues zinc bisglycinate at ~25-30% absorbability versus zinc oxide at ~10%. Drugstore-aisle zinc oxide tablets are the cheapest format but require 2-3× the elemental dose to deliver equivalent bloodstream zinc — and the chronic GI tolerance is significantly worse (oxide is associated with more nausea reports than chelated forms). Even at NOW's budget price point, you're getting a real chelate at $9/month — there's no cost-savings to be had by dropping further down the form ladder to oxide. NOW Zinc Glycinate is the cost-floor below which form quality starts to meaningfully degrade.

Slight onset edge, not a huge differentiator. Softgels dissolve cleanly with food without the disintegration phase capsules and tablets require — the zinc bisglycinate is released uniformly as the gel melts in the stomach. For users with pill aversion or swallowing difficulties, softgels are objectively easier than capsules or tablets. For typical adults, the absorption end-state is the same as a capsule of the same chelate. The format wins on swallowing ease and slight onset speed; doesn't lose on absorption or stability. NOW's choice of softgel is appropriate for the bisglycinate molecule and oil-base carrier (250 mg cold-pressed pumpkin seed oil + beeswax) supports stable shelf life across a 4-month bottle.

1. [1] Prasad 1996 PMID 8875519 — Zinc status and serum testosterone levels of healthy adults. 30 mg/day zinc for 6 months in marginally zinc-deficient men nearly doubled serum testosterone (8.3 → 16.0 nmol/L). The dose template NOW's single-softgel 30 mg matches exactly at the lowest cost per active mg on the list.
2. [2] Maares & Haase 2020 PMID 32183116 — A guide to human zinc absorption: general overview and recent advances of in vitro intestinal models. Form-by-form absorption catalogue: bisglycinate ~25-30% absorbable, roughly 2× the oxide form. Validates NOW's bisglycinate as absorption-equivalent to the picolinate used by Thorne and Pure Encapsulations.
3. [3] Cervantes 2019 PMID 29193602 — The role of zinc in the treatment of acne: A review of the literature. 30-50 mg elemental zinc daily matched low-dose oral antibiotics for inflammatory acne. NOW's 30 mg softgel sits at the lower bound of the trial range.
4. [4] Wessells & Brown 2012 PMID 23209782 — Estimating the global prevalence of zinc deficiency. ~17% global zinc-deficiency risk, concentrated in plant-based diets. The structural-deficiency baseline that NOW's cheap-chelate format makes accessible without budget constraint.
5. [5] Hemilä 2017 PMID 28515951 — Zinc acetate lozenges for treating the common cold: an individual patient data meta-analysis. Lozenge meta-analysis: 75-80 mg/day acute cut cold duration ~33%. NOW's daily 30 mg softgel addresses chronic immune baseline, not acute cold protocols.