Zinc is a mineral your skin cannot do without — it is required for the enzymes that copy DNA when cells divide, and skin divides constantly. It is also one of the few skin ingredients a European regulator has authorised a claim for, at a threshold a Lipo Crystal sachet clears more than three times over.
01 — The mineral
What zinc does in skin
Zinc is a structural and catalytic component of hundreds of enzymes. Three of its jobs matter to skin in particular: it is required for normal DNA synthesis, which is what a dividing skin cell is doing; it takes part in the antioxidant defence that protects cells from oxidative stress; and it modulates inflammatory signalling.
Those are not marketing sentences. They are the mechanisms behind the wording European regulators have authorised: zinc “contributes to the maintenance of normal skin”, a claim permitted for any product supplying at least 15% of the 10 mg nutrient reference value — 1.5 mg a day.
Zinc deficiency shows up in skin before almost anywhere else. The rare inherited disorder acrodermatitis enteropathica, in which zinc absorption fails, produces a dramatic rash that resolves with zinc. That is how firmly the link is established.
02 — The dose
What 5 mg actually is
That threshold — 1.5 mg a day — is the intake at which those mechanisms can be relied on.
A Lipo Crystal sachet carries 5 mg: half the nutrient reference value for zinc, and more than three times what the claim requires. It arrives every day, in the same sachet as the rest of the formula, which is what a daily top-up is for rather than an occasional large dose.
Zinc is also a mineral where the ceiling matters as much as the floor. More is not automatically better, and the reason is below.
03 — Diet
Where most of your zinc comes from
A supplement is a top-up, not a source. Adults need roughly 8–11 mg of zinc a day depending on sex and reference body, and most of it comes from food: oysters by a wide margin, then red meat, poultry, crab, beans, nuts, pumpkin seeds and whole grains.
Two things reduce how much you absorb. Phytates, found in whole grains and legumes, bind zinc in the gut, which is why largely plant-based diets need more of it. And high-dose supplemental iron taken at the same time competes with zinc for absorption.
Which is the useful framing for 5 mg in a daily sachet: it closes a gap in an ordinary diet.
04 — Safety
Why more is not better
Zinc has a well-defined ceiling. The European tolerable upper intake level for adults is 25 mg a day from all sources; the equivalent US figure is 40 mg. Above that, sustained intake interferes with copper absorption and can cause a copper deficiency anaemia. Acute high doses cause nausea.
Therapeutic doses used in supervised trials run at or above that European ceiling, deliberately and for a defined period. That is a medical decision with a defined risk rather than a daily habit, and it is why a sachet carries 5 mg rather than more.
Lipo Crystal is a food supplement, not a medicine, and is not intended to diagnose, treat, cure or prevent any disease. If you are taking any other zinc-containing supplement, count it.
At the doses used in randomised trials, yes, modestly. Those trials used 20 to 30 mg of elemental zinc a day for two to three months. In one, 59.5 per cent of patients on zinc showed more than 50 per cent improvement in acne severity. In a multicentre trial comparing zinc gluconate with minocycline, zinc worked but the antibiotic worked better. Zinc is not a replacement for medical treatment of acne.
5 mg per 3 g sachet, one sachet a day. That is 50 per cent of the European nutrient reference value of 10 mg, and more than three times the 1.5 mg at which the authorised claim about maintaining normal skin applies.
The European tolerable upper intake level for adults is 25 mg a day from all sources, and the United States sets it at 40 mg. Sustained intake above the ceiling interferes with copper absorption and can cause a copper deficiency anaemia. If you take more than one supplement containing zinc, add the amounts together.
Oysters contain far more zinc than any other common food. After that, red meat, poultry, crab, beans, nuts, pumpkin seeds and whole grains. Phytates in whole grains and legumes bind zinc and reduce absorption, so people eating mostly plant-based diets generally need more than the headline requirement.
