We Tested 13 Zinc in the UK — See Which One Is Best

What to Look for in Zinc

The single most important decision when buying a zinc supplement is the form. Not all zinc is created equal — zinc oxide, the cheapest form found in many budget products, is poorly absorbed by the body. What you want is a chelated form: zinc picolinate, zinc bisglycinate, or a combination of both. Our analysis of 13 products shows that every product in the top five uses zinc picolinate, and there's a reason for that. Picolinate is bound to picolinic acid, which the gut recognises and absorbs efficiently, meaning more zinc actually reaches your cells.

Dosage matters, but more is not always better. The UK recommended daily intake for zinc is 9.5mg for men and 7mg for women. Most of the products we analysed sit between 22mg and 50mg — well above daily requirements, which is intentional for those with a confirmed deficiency. However, long-term intake above 25mg daily can deplete copper, so look for products that include copper alongside zinc. The Igennus Clean Chelated Zinc includes copper in the formula, which is a meaningful detail that separates it from single-ingredient options.

Third-party testing is the other factor that separates trustworthy products from unknowns. Of the 13 products we analysed, only 2 were independently verified by a third-party lab. Thorne, the top scorer at 85.0/100, is one of them. This matters because supplement labels in the UK are not pre-verified by the MHRA — what's on the label is not legally guaranteed to be what's in the bottle unless an external lab checks. If you're buying zinc for a specific health reason like immune support or reproductive health, that verification is worth paying for.

Finally, check for unnecessary additives. Many low-scoring products use fillers, artificial colours, or allergens that serve no nutritional purpose. Clean-label products with short ingredient lists tend to score higher across the board in our analysis, and they're kinder to anyone with sensitivities.

Common Mistakes When Buying Zinc

The most common mistake is buying zinc oxide because it's cheap. Our analysis of 13 products shows a price range from £3.00 to £21.38, and products at the very bottom of that range are almost invariably using low-absorption forms. If zinc oxide is passing through your gut without being absorbed, you've wasted even that small amount of money. The effective dose never reaches you.

Another error is trusting Amazon star ratings over actual product quality. Amazon ratings reflect customer satisfaction with delivery, packaging, and placebo-level impressions — not bioavailability or lab-verified potency. Several of the lower-scoring products in our dataset carry high Amazon ratings because customers simply haven't noticed the difference. Zinc deficiency improves slowly over weeks, which makes it easy to attribute improvement to any product you happen to be taking.

Buyers also frequently ignore dose per serving versus cost per dose. A bottle that looks expensive upfront — like the Igennus Clean Chelated Zinc at £14.95 — actually represents a six-month supply at 180 tablets. That works out to roughly 8p per day, which is better value than several cheaper-looking competitors once you do the per-serving maths.

Finally, many people take zinc without checking whether they're actually deficient. Zinc supplements are most beneficial for people with confirmed or suspected deficiency, athletes with elevated turnover, or those preparing for pregnancy. Taking high-dose zinc long-term without a reason can suppress copper levels and cause its own problems. A blood test from your GP is worth considering before committing to a high-dose regimen.

Types and Forms Explained

The zinc supplement market is dominated by tablets, which account for the majority of the 13 products we reviewed. Tablets are convenient, shelf-stable, and easy to dose accurately. They tend to have a longer shelf life than capsules and are often cheaper to manufacture, which can translate to better value. Most of the top-scoring products in our analysis, including those from Thorne and Solgar, come in tablet form.

Capsules are less common in this category but have their uses. They're easier to swallow for people who struggle with tablets, and some manufacturers use them to deliver zinc alongside oil-soluble cofactors. If you have difficulty swallowing or prefer a softer format, capsules are a reasonable alternative — just check that the zinc form inside is still chelated.

Within the tablet category, the key distinction is the zinc compound. Zinc picolinate tablets are the most researched and widely recommended chelated form. Zinc bisglycinate is another well-absorbed option, bound to the amino acid glycine, and tends to be particularly gentle on the stomach. The Igennus product combines both picolinate and bisglycinate, which is a sensible approach for people who've had digestive discomfort with single-form zinc supplements.

Avoid products labelled simply as "zinc" without specifying the compound — this usually signals zinc oxide or zinc sulfate, both of which have lower bioavailability and a higher likelihood of causing nausea when taken on an empty stomach. If the label doesn't tell you what form the zinc is in, that's a red flag.

What to Expect to Pay

Based on our analysis of 13 UK zinc products, prices range from £3.00 at the low end to £21.38 at the top, with an average of £11.31. What you get at each price point varies considerably.

Under £5 you're almost certainly getting zinc oxide or zinc gluconate in a large-count bottle. The cost per tablet looks attractive, but absorption is poor and there's little quality control. These products scored at the lower end of our range, with the lowest score in our dataset coming in at 43.0/100.

Between £7 and £15 is where the real value sits. The Solgar Zinc Picolinate 22mg at £7.55 scored 73.0/100 — a decent chelated option at a reasonable price. Solgar's slightly larger pack at £9.99 scored 79.0/100. The best value product in our analysis, however, is the Igennus Clean Chelated Zinc at £14.95, scoring 81.0/100 with a value-for-money score of 83.0/100. At 180 tablets covering six months, the per-dose cost is lower than most competitors in this bracket, and it includes copper to prevent depletion.

Above £15, you're entering premium territory. The top scorer, Thorne Zinc Picolinate 22mg at £21.38, earns its 85.0/100 through rigorous third-party testing and clinical-grade manufacturing standards. For most people, the Igennus option at £14.95 hits the right balance of quality and cost. But if you want the gold standard in verified purity — particularly relevant for athletes in tested sports, or those with complex health needs — Thorne is worth the premium.