Thirty years and one mineral I keep coming back to
I have sold supplements from this shop for three decades. In that time, I have stocked probably a dozen different zinc products in half a dozen forms at various doses. Most of them are still on my shelves. But if someone walks in and says, "Mark, I just need a decent zinc," I reach for the same thing almost every time: zinc picolinate at 20mg.
That is not brand loyalty or habit. It is a conclusion I have landed on slowly, through watching what people actually get on with. And because you deserve an honest account rather than a sales pitch, I am also going to tell you the situations where zinc picolinate at 20mg is the wrong choice, and what I would pick instead.
Why the form of zinc matters more than most people realise
Zinc is not zinc. The mineral itself is the same, but the compound it is attached to changes how well your gut can absorb it and how gently it sits in your stomach. This is not marketing fluff. It is basic chemistry, and it has a real effect on whether a supplement is worth taking or worth binning.
Here is a quick rundown of the forms you will commonly see:
- Zinc oxide - Cheap to manufacture and poorly absorbed. You will find it in budget multivitamins. I would not buy it on its own.
- Zinc sulphate - Better absorbed than oxide, but notorious for causing nausea. Functional, but unpleasant for a lot of people.
- Zinc citrate - Good absorption, gentler on the gut than sulphate. A solid, honest choice. I stock Viridian Zinc Citrate 90 Capsules and they sell steadily.
- Zinc gluconate - Widely used and reasonably well absorbed. Often seen in lozenges. Fine for short-term use.
- Zinc picolinate - Bound to picolinic acid, which your body also produces naturally. Generally considered one of the better-absorbed forms and sits well in the stomach for most people.
- Zinc bisglycinate - An amino acid chelate, very gentle. Good for anyone with a sensitive gut.
The reason I keep reaching for picolinate is the combination of absorption and tolerability. Most people can take it without feeling sick, which means they actually keep taking it. Consistency is everything with minerals.
View in the shop
Why 20mg specifically
Dose matters as much as form. The EU nutrient reference value for zinc is 10mg per day. So why do I reach for 20mg rather than a lower-dose option?
Because most people coming to me are not eating a diet that reliably covers their baseline. Vegetarians and vegans absorb less zinc from plant sources due to phytates. People who train hard have higher requirements. Older adults tend to absorb minerals less efficiently. For these groups, a 10mg supplement on top of a suboptimal dietary intake does not move the needle much.
At 20mg, you are giving the body enough to actually work with, while staying within a sensible, conservative range. I am not talking about high-dose therapeutic use. I am talking about topping up a shortfall in a way that is meaningful. If you are ever unsure about your own requirements, talk to your GP, particularly if you are on any medication or managing a health condition.
The product I reach for in this case is our own LSC Zinc Picolinate 20mg: 60 Daily Capsules. No fillers I cannot pronounce, no marketing waffle on the label. Just zinc picolinate at the dose I would take myself.
When zinc picolinate at 20mg is not the right call
Here is the part most supplement companies skip. There are genuine situations where I would reach for something else entirely.
If someone has a sensitive stomach: Picolinate is generally kind, but not universally so. For anyone who struggles with capsules or has a reactive gut, I would look at a powder format. The Viridian Calcium, Magnesium and Zinc Powder 100g lets you adjust the dose and mix it into food, which reduces the chance of irritation and suits people who prefer not to swallow capsules.
If someone wants zinc alongside other minerals: Zinc does not always need to be taken alone. If someone is looking at broader mineral support, a combined product makes more sense than three separate capsules. That is where the Viridian powder earns its place again.
If someone is already on a good quality multivitamin: If your multi already has 10 to 15mg of zinc in a decent form, adding another 20mg on top every day is unnecessary and potentially counterproductive. Too much zinc over time can suppress copper levels. More is not always better. This is the most common mistake I see.
If someone is a vegetarian or vegan who also wants fenugreek: It comes up more often than you might expect. Zinc contributes to the maintenance of normal testosterone levels in the blood, which is an EFSA-authorised claim, and some people want additional botanical support alongside it. Worth a conversation in the shop.
A quick comparison of zinc forms
| Form | Absorption | Stomach tolerance | Best suited for |
|---|---|---|---|
| Zinc oxide | Low | Generally fine | Not something I would recommend alone |
| Zinc sulphate | Moderate to good | Can cause nausea | Short-term use if cost is a constraint |
| Zinc citrate | Good | Good | Everyday use, reliable choice |
| Zinc gluconate | Moderate | Good | Lozenges and short courses |
| Zinc picolinate | Good to very good | Good | Daily supplementation, my most common recommendation |
| Zinc bisglycinate | Good | Very good | Sensitive gut, low tolerance for capsules |
What zinc actually contributes to
I want to be clear here, because EFSA is the relevant authority on what zinc can be said to support, and I stick to that. No supplement will cure or treat a deficiency in the medical sense. That is your GP's job to assess and manage.
What zinc contributes to, according to authorised claims, includes normal immune function, normal cognitive function, normal fertility and reproduction, the maintenance of normal hair, skin and nails, normal testosterone levels in the blood, normal DNA synthesis, and normal protein synthesis. That is a meaningful list. It reflects how central zinc is to basic cellular function.
If you think you have a genuine deficiency, get a blood test and talk to your GP about the result before deciding on a dose.
FAQ
Is zinc picolinate 20mg safe to take every day?
For most healthy adults, yes. The tolerable upper intake level for zinc set by the European Food Safety Authority is 25mg per day for adults. A 20mg supplement sits just under that, so it leaves little room for additional zinc from other sources. If you are also taking a multivitamin, add up your total intake first. If you are pregnant, breastfeeding or on medication, talk to your GP before starting.
Should I take zinc picolinate with or without food?
With food, as a general rule. Taking zinc on an empty stomach increases the chance of nausea, even with a well-tolerated form like picolinate. A small meal is enough. Many people take it with breakfast, which works well and ties it to an existing habit.
How is zinc picolinate different from zinc citrate?
Both are well-absorbed forms and both are gentle on the stomach. Picolinate is bound to picolinic acid, citrate to citric acid. In practical terms, the difference in absorption between the two is not enormous. I stock both because some people have a preference and because they suit slightly different product formats. Either is a far better choice than zinc oxide.
Can I take zinc alongside other supplements?
Usually yes, but watch a couple of interactions. High-dose iron can compete with zinc for absorption, so take them at different times if you are using both. And as I mentioned, too much zinc over time can reduce copper absorption, which is why stacking a zinc-rich multi with a separate high-dose zinc product is worth thinking through carefully.