What does the hemp extract do here — does the product have any psychoactive effect?

In this gel-balsam, hemp (Cannabis sativa) extract plays a skin-care role, not a pharmacological one. It is included because it contains plant lipids and related compounds that help soften the skin surface and reduce the feeling of dryness. This balances the formula: the viper venom extract provides the strong warming and tingling sensation, while the hemp extract keeps the product conditioning rather than drying — a useful combination if you plan to massage the same area repeatedly, for example on the lower back or knees over several days.

As for psychoactive effects: no. This is a cosmetic applied externally to body skin, and hemp extracts used in cosmetics are skin-conditioning ingredients. The product is not ingested, is not intended to produce any effect beyond the skin sensation and surface care described, and choosing it has nothing to do with cannabis consumption. If you have ever reacted to hemp-based skincare or hemp seed oil on the skin, include that consideration in your patch test, as with any plant extract.