For vitamin D deficiency: 50,000 IU per week for 6-12 weeks has been used. However, some patients require higher doses for longer periods of time to maintain optimal blood levels of vitamin D.

If you do wish to use your hot tub in winter, always make sure it is positioned on a raised platform and preferably in a sheltered or covered area. If you leave your Lay‑Z‑Spa out in winter without using it, and the temperature drops below 4°C, the water could freeze within the pump and cause irreparable damage.

For safety, never use an antifreeze containing Ethylene Glycol—the kind you use in your car—in your hot tub. It’s toxic. A long funnel for pouring the antifreeze into narrow openings.

A vitamin D deficiency is unlikely to cause weight gain. However, it may cause other health problems or unpleasant symptoms, which are worth avoiding. You can maintain adequate vitamin D levels through a combination of limited sun exposure, a vitamin-D-rich diet, and taking vitamin D supplements.

Vitamin D can protect against experimental serotonin depletion in rats (30) and a menopausal decline in serotonin, a neurotransmitter with known effects on thermoregulation, may be a contributor to hot flashes (31-33).

V D interacts with the cells that build the immune system. When your body runs low on vitamin D, it affects your immunity, making you more prone to ailments like cold and flu, fever, allergies, asthma, and eczema.

A hot flash is the sudden feeling of warmth in the upper body, which is usually most intense over the face, neck and chest. Your skin might redden, as if you’re blushing. A hot flash can also cause sweating. If you lose too much body heat, you might feel chilled afterward.

For example, breast cancer patients with higher vitamin D levels have fewer hot flashes and other symptoms than women with lower levels. Supplementing vitamin D can improve mood in other groups of people. The vitamin can protect against depletion of serotonin, which plays a role in regulating body heat.

Vitamin E. Taking a vitamin E supplement might offer some relief from mild hot flashes. In high doses, it can increase your risk of bleeding.

Excessive sweating, especially sweating of the head, can be a sign of a vitamin D deficiency. A change in the amount you sweat or your sweating patterns should be cause for concern.

The reason is simple, sweaty head and excessive sweating is one of the first and earliest symptoms of vitamin D deficiency.

When it comes to water-soluble vitamins, sweat is a threat. During an intense workout, sweat carries out our B vitamins, vitamin C, and important minerals. As athletes, this is particularly concerning because of the importance of these vitamins in our energy production, waste removal, and muscle growth and repair.

Functional vitamin B12 deficiency is common and a major cause of morbidity. It can manifest with a wide variety of symptoms including fatigue and drenching night sweats.