On Wednesday we wrote about vitamin C and why it is so demanding to keep stable in a bottle. Light, air and heat can break it down, and that is why brands often ask us whether other ingredients can support brighter looking skin. One plant that researchers keep studying for this purpose is the grapevine.
What grapevine extracts are
Cosmetic extracts can be made from more than the grape itself. Leaves and canes, the woody shoots that are pruned after harvest, are both used as raw material. These extracts are rich in polyphenols, plant compounds with antioxidant properties. The best known grape polyphenol is resveratrol, found in the common grapevine, Vitis vinifera. Which compounds an extract contains depends on the grape variety, the part of the plant and the way it is extracted.
Where polyphenols come in
Dark spots form when skin produces extra melanin, the pigment behind skin color. Tyrosinase is one of the key enzymes in making it. In laboratory studies, resveratrol has been shown to inhibit tyrosinase, and extracts from grape canes have shown the same effect in enzyme tests. Separately, grapevine leaf extracts from many different grape varieties have been studied for their potential against hyperpigmentation caused by UV radiation.
What this does and does not mean
These findings come mainly from laboratory research. Such studies show how an ingredient behaves in a test, not how a finished product performs on skin. We do not say that a grape extract matches vitamin C. They are different ingredients with different evidence behind them. What the research does show is that the grapevine is an active area of study for brightening focused formulas, and that is why many brands are curious about it.
What formulators check
An extract is a natural material, so the specification matters. We look at the plant part, the grape variety, the extraction method, the polyphenol content and the documentation from the supplier. Because polyphenols are antioxidants, a formula that contains them also needs stability testing, just like any other active, before it goes to market.
What this means for brands
If you are planning a brightening product, a few questions are worth answering early. Do you want vitamin C, a plant based active, or a combination of both? What claims do you plan to make, and what data will support them? Which packaging will protect the formula, and how long does it need to stay stable? Settling these before development saves time, samples and reformulation later.
At Vaulabs, we develop and manufacture in our FDA-registered facility in Clearwater, Florida, and we choose actives based on how they behave in a real formula. If you are planning a brightening serum, send us your idea and we will walk you through the options.