How To Use Red Light Therapy For Testosterone In New Zealand

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# Can Red Light Therapy Increase Vitamin D In Australia

Vitamin D is a critical nutrient for Australians, supporting bone health, immune function, and overall well-being. However, strict sun safety practices—designed to reduce the country’s high skin cancer risk—have led to widespread vitamin D deficiency. Recent years have seen red light therapy (RLT) gain popularity as a wellness tool with claims that it can boost vitamin D levels. But does the science back this up? This article explores the relationship between RLT and vitamin D in the Australian context, drawing on evidence-based research and local health guidelines.

## What Is Vitamin D And Why Is It Critical For Australians?

Vitamin D is not just a vitamin; it is a hormone precursor that plays multiple roles in the body. Its primary function is to help the body absorb calcium and phosphorus, which are essential for strong bones and teeth. Deficiency can lead to rickets in children and osteoporosis in adults, increasing the risk of fractures. Emerging research also links vitamin D to immune function—supporting the body’s ability to fight infections—and mental health, with low levels associated with increased risk of depression.

In Australia, the importance of vitamin D is balanced against the country’s status as the highest per capita melanoma rate in the world. The “slip slop slap” campaign launched in the 1980s has successfully reduced sun exposure but this has come at a cost. According to the Australian Bureau of Statistics, around 30% of adults have insufficient vitamin D levels, with rates rising to 50% in southern states like Tasmania and Victoria during winter. Elderly individuals, those with darker skin tones, and people who spend most of their time indoors are at even higher risk.

## How Does The Body Normally Make Vitamin D?

The body produces most of its vitamin D through sun exposure. When UVB rays (290–315 nanometers) hit the skin, they convert a compound called 7-dehydrocholesterol into previtamin D3. This is then converted to vitamin D3 (cholecalciferol), which travels to the liver and kidneys to become the active form of vitamin D (calcitriol).

Several factors affect how much vitamin D the body makes in Australia. Latitude is a key one: cities like Brisbane (lower latitude) have higher UVB levels year-round, while Hobart (higher latitude) has minimal UVB in winter. Season also plays a role—UVB levels drop significantly in winter months. Skin type matters too: people with darker skin have more melanin, which blocks UVB, requiring longer sun exposure to make the same amount of vitamin D. Sunscreen with an SPF of 15 or higher blocks most UVB, so applying it before sun exposure stops vitamin D synthesis. Clothing and time of day (peak UVB is between 10am and 3pm, when sun safety guidelines advise avoiding direct sun) also reduce production.

Dietary sources of vitamin D are limited in Australia. Fatty fish like salmon, sardines, and tuna are good sources but many Aussies do not eat enough of these. Fortified foods such as milk, soy milk, and some cereals contain small amounts but are not sufficient to meet daily needs for most people. Supplements are often recommended for those at risk.

## What Is Red Light Therapy (RLT)?

Red light therapy, also known as low-level laser therapy (LLLT) or photobiomodulation (PBM), uses low-intensity red and near-infrared (NIR) light (600–1000 nanometers) to treat various health conditions. Unlike UV light, red and NIR light are not visible to the naked eye and do not damage the skin.

How RLT works is by delivering photons to cells, which are absorbed by mitochondria—the powerhouses of the cell. This boosts adenosine triphosphate (ATP) production, reduces inflammation, and improves circulation. Common uses of RLT in Australia include skin rejuvenation (reducing wrinkles and acne), pain relief (for joint and muscle pain), and wound healing. Some wellness clinics and at-home devices market RLT for additional benefits including vitamin D synthesis, but these claims are not supported by evidence.

In Australia, RLT devices are regulated by the Therapeutic Goods Administration (TGA). Some devices are classified as Class IIa medical devices and approved for specific uses like pain relief, but no RLT device is approved by the TGA for vitamin D supplementation.

## The Science: Can RLT Increase Vitamin D Levels?

The short answer is no. To understand why, we need to look at the wavelength required for vitamin D synthesis. Vitamin D production relies on UVB rays (290–315 nm), which are shorter than the red and NIR light used in RLT (600 nm and above). Red light cannot trigger the conversion of 7-dehydrocholesterol to previtamin D3—the first step in vitamin D synthesis.

This is supported by a 2021 systematic review published in the Journal of Photochemistry and Photobiology B, which found no significant evidence that RLT increases vitamin D levels in humans. The review analyzed 12 studies and concluded that while RLT has other benefits, it does not affect vitamin D status.

Some proponents of RLT claim indirect benefits for vitamin D, such as improved skin health leading to better absorption of dietary vitamin D or increased circulation helping the body use vitamin D more effectively. However, there is no robust scientific evidence to support these claims.

Aussie experts also confirm this. Dr Sarah Wilson, a dermatologist based in Sydney and member of the Australian Dermatological Association, says “Red light therapy does not provide the UVB radiation needed to make vitamin D. Any claims that it can are misleading and not based on science.”

## Aussie-Specific Considerations For Vitamin D And RLT

For Australians, the myth that RLT can boost vitamin D is particularly relevant given the country’s unique combination of high skin cancer risk and vitamin D deficiency.

In southern states like Tasmania, where UVB levels are low in winter, some people may be tempted to try RLT as an alternative to sun exposure. However, this is not effective and could lead to prolonged vitamin D deficiency, which has serious health consequences.

The TGA has warned against unsubstantiated claims about RLT and vitamin D. In a 2022 statement, the TGA said “Consumers should be cautious of any RLT device marketed for vitamin D synthesis as there is no scientific evidence to support this claim.”

Another consideration is the cost of RLT. At-home devices can cost hundreds of dollars and clinic sessions are even more expensive. For people on a budget, this money could be better spent on vitamin D supplements, which are affordable and evidence-based.

## Safe, Evidence-Based Ways To Boost Vitamin D In Australia

Instead of relying on RLT, Australians should use evidence-based methods to maintain healthy vitamin D levels. These include:

1. Safe Sun Exposure: Short daily doses of sun are the most effective way to make vitamin D. The Cancer Council Australia recommends 5–10 minutes of sun exposure on the arms, face, or hands, 2–3 times a week. This should be done outside peak UV hours (before 10am or after 3pm) to avoid skin damage. Check the UV index: if it is 3 or above, you can make vitamin D.

2. Dietary Sources: Eat fatty fish (salmon, sardines, tuna) at least twice a week. Include fortified foods like milk, soy milk, and cereals in your diet. Eggs (yolks) also contain small amounts of vitamin D.

3. Supplements: For people at risk of deficiency (elderly, dark-skinned, limited sun exposure), vitamin D3 supplements are recommended. The recommended daily intake (RDI) for adults is 10 micrograms (400 IU), but in winter this may need to be increased to 25 micrograms (1000 IU) or more as advised by a doctor. Always consult a healthcare professional before starting supplements, especially if you have health conditions or take medications.

4. Medical Testing: If you are unsure about your vitamin D levels, ask your doctor for a blood test. This is the only way to confirm deficiency.

## Conclusion

Red light therapy is a popular wellness tool with some evidence for benefits like pain relief and skin rejuvenation. However, it does not increase vitamin D levels in Australia or anywhere else. This is because RLT uses red and NIR light, which lacks the UVB radiation needed to trigger vitamin D synthesis in the skin.

Australians should focus on evidence-based methods to maintain healthy vitamin D levels, including safe sun exposure, dietary sources, and supplements when necessary. It is important to balance sun safety with vitamin D needs to avoid both skin cancer and deficiency.

Consumers should be cautious of any RLT device or service marketed for vitamin D synthesis. Always check with a healthcare professional before trying new wellness treatments and follow local health guidelines from organizations like the Cancer Council Australia and the TGA.