June 2026 was one of the warmest on record — half the month hit at least 25°C, and SMHI is flagging that the next wave of extreme heat could reach southern Sweden already in the first half of July. When it is 30°C outside, two things happen to the body that are easy to miss: you lose minerals in your sweat, and your skin barrier works harder to hold on to moisture.

The nice thing is that the same little seed can help on both fronts — and a hemp seed oil applied on top does a job of its own.

Inside: the minerals you sweat out

When you sweat you lose more than water — you lose electrolytes, especially magnesium and potassium. Hemp seeds are unusually rich in both: around 483 mg magnesium and 859 mg potassium per 100 g. A handful of hulled seeds (30 g) gives roughly 145 mg magnesium — nearly 40% of the daily requirement.

That matters, because under EU food law these are among the few things we are actually allowed to say plainly:

  • Magnesium contributes to normal electrolyte balance and to the reduction of tiredness and fatigue.
  • Potassium contributes to normal muscle function.
  • Zinc contributes to the maintenance of normal skin — and hemp seeds provide around 2 mg zinc per handful.

No miracles, just nutrition the body needs more of when it sweats — and zinc is what connects us to the skin.

Skin in the heat: the barrier that holds moisture in

Your skin is the body's waterproof layer, and that job is done by the barrier on the outside — a mortar of lipids between the skin cells. Two fatty acids are the building blocks: linoleic acid (omega-6) and alpha-linolenic acid (omega-3). Hemp seed oil is unusual because it contains both in a balanced ratio of about 3:1 (27% linoleic acid, 9% omega-3), close to the skin's own profile.

That fatty acids matter for skin is well established in research. In two randomised, placebo-controlled studies, daily omega-3 supplementation produced a dose-dependent improvement in skin hydration and a measurable reduction in transepidermal water loss — up to 8.6% lower at the higher dose. The study used marine omega-3, not hemp, and describes the state of research rather than an effect of our products — but it shows why fatty acids and the skin barrier are linked.

Outside: hemp seed oil when the skin is dry and warm

This is where skincare comes in. Our botanical face & neck oil from Natural Beauty by Kannavalley is built on Cannabis Sativa Seed Oil — hemp seed oil rich in linoleic acid. Applied topically it lays down a lipid film that helps skin hold moisture and feel soft — exactly the kind of support dry, sun-stressed summer skin wants in the evening.

As cosmetics we talk about comfort and moisture, not about curing anything — but the logic is simple: top up fats from within through food, and put fats back on top with the oil.

Meanwhile, in the fields

The same sun that has you dragging the mattress onto the balcony is doing something entirely different out on Gotland. Hemp is in its most important growth phase, with up to 18 hours of daylight — and every hour of sun builds the single harvest of the year. The long Nordic light is exactly what makes Gotland hemp unique.

So next time you're sweating in the shade: the nutrition that helps you through the heat grows in the same heat.

Inside: hulled and roasted hemp seeds. Outside: hemp seed oil for the skin.