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Too MUCH sunscreen is making us vitamin D deficient by blocking the good side of sunshine, controversial study claims

A new study claims our sunscreen could be too thick, blocking vitamin D from our skin
  • Rates of vitamin D deficiency rocketed from 45% to 75% in 25 years in the US
  • A new study claims our sunscreen could be too thick, blocking the sun's rays
  • It is controversial given the rising rates of melanoma (skin cancer) worldwide 

Our dedication to suntan lotion has driven up rates of people needing vitamin D supplements, a controversial new study claims.

Figures suggest three-quarters of the US population are deficient in the 'sunshine vitamin', including 95 percent of African Americans. 

That is a dramatic climb from the early 90s, when fewer than half the country needed vitamin D supplements.

Many studies have warned it likely boils down to people spending more time inside.

But a new paper published on Monday tabled a different theory: we are wearing so much highly-protective sunscreen that we are blocking out the sun's benefits. 

It is a staggering claim as the nation battles rising rates of melanoma, a deadly form of skin cancer.   

Assistant professor Dr Kim Pfotenhauer, from Touro University, California, said: 'People are spending less time outside and, when they do go out, they're typically wearing sunscreen, which essentially nullifies the body's ability to produce vitamin D.

'While we want people to protect themselves against skin cancer, there are healthy, moderate levels of unprotected sun exposure that can be very helpful in boosting vitamin D.' 

Dr Pfotenhauer also said chronic diseases like Type 2 Diabetes and those related to malabsorption, including kidney disease, Crohn's and celiac disease greatly inhibit the body's ability to metabolise vitamin D from foods.

Considered a hormone rather than a vitamin, vitamin D is produced when skin is exposed to sunlight, and vitamin D receptors are found in virtually every cell in the human body.

As a result, it plays a wide role in the body's functions, including cell growth modulation, neuromuscular and immune function and inflammation reduction.

Symptoms for insufficient or deficient vitamin D include muscle weakness and bone fractures.

People exhibiting these symptoms or who have chronic diseases known to decrease vitamin D, should have their levels checked and be treated if levels are too low.

Increasing and maintaining healthy vitamin D levels can be as easy as spending 5-30 minutes in midday sun twice per week.

Lighter skin synthesizes more vitamin D than darker skin, and it is important to forgo sunscreen during these sessions because SPF 15 or greater decreases vitamin D3 production by 99 percent.

Dr Pfotenhauer added: 'You don't need to go sunbathing at the beach to get the benefits.

'A simple walk with arms and legs exposed is enough for most people.'

Food sources such as milk, breakfast cereals, and Portobello mushrooms are also fortified with vitamin D.

Research is ongoing to determine whether vitamin D deficiency has a role in multiple sclerosis, autoimmune disorders, infections, respiratory disease, cardiometabolic disease, cancer, and fracture risk.

Dr Pfotenhaur added: 'Science has been trying to find a one-to-one correspondence between vitamin D levels and specific diseases.

'Given vitamin D's ubiquitous role in the body, I believe sufficient vitamin D is more about overall health.

Story Source: The above story is based on materials provided by DAILYMAIL
Note: Materials may be edited for content and length

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