Frequently Asked Questions

Here you will find answers to our customers most commonly asked questions.

Frequently Asked Questions

Vitamin D Related

Why do I need Vitamin D?

As with all nutrients, our bodies need vitamin D from the environment to function properly. Vitamin D plays an important role in bone health by regulating with calcium absorption. This is a very clear relationship as its classic deficiency symptoms are diseases of the bones – rickets in children and osteoporosis in older adults (Bilke DD, 2014). However, with the discovery of vitamin D receptors in virtually every type of cell in the body Pludowski et al. 2018), we have found that vitamin D affects many other parts of the body, like the immune system (Ginde 2009) and the cardiovascular system (Michaelsson et al. 2010). This combination of health benefits may be why those with higher vitamin D blood levels live better for longer (Garland 2014).

How do I get Vitamin D?

Vitamin D3 is the primary raw material to make active and usable Vitamin D. It is produced when the body is exposed to sunlight (ultraviolet B radiation sunlight). The precise amount of vitamin D3 produced will vary depending on factors such as skin tan, location in respect of the equator, season, and time of the day. Vitamin D can also come from our diet but there are very few foods in nature that actually contain it. The best sources of Vitamin D in nature are fatty fish like salmon, tuna, mackerel, as well as cheese, mushrooms, apples, egg yolks, sardines and foods that have been supplemented. Supplements are a potent source of Vitamin D and raise blood levels effectively.

How much do I need?

It depends! Some people may be able to reach adequate Vitamin D blood serum levels through sun exposure, while some may achieve it through a high-fish diet and fortified foods, and others may take a supplement. Most people will need a combination of two or three of these things. There isn't much consensus as to what sufficient levels look like with a large variance between sufficiency and toxicity. We recommend aiming to have a blood serum of at least 30ng/ml / 75nmol/L.

What if I already supplement or spend a lot of time outside?

Yes! Even those who live in sunnier climates and/or take Vitamin D supplements may still might be falling short because there are so many factors that can affect your Vitamin D blood serum level. The only way to truly know if your diet or environment is delivering what you need is to take one of our self tests.

Frequently Asked Questions

Vitamin D Test Related

What does the Vitamin D Test measure?

The blood serum level of Vitamin D that we present is equal to the concentration of total vitamin D level in plasma or serum and is measuring the total amount of 25(OH)D circulating in the bloodstream. 25(OH)D or calcifediol is the first metabolite of Vitamin D that has undergone hydroxylation in the liver to add a OH bond at carbon position 25 of the Vitamin D molecule. It is important to note that this test is not measuring the active form of Vitamin D, 1,25(OH)2D or calcitriol, this is the hormonal seco-steroidal metabolite that is responsible for many of the beneficial immune supporting properties of Vitamin D.

How accurate are your tests?

Our Vitamin D self test kits arebased on immuno-assay in vitro diagnostic technology developed by experts in the United States. It is CE certified by DEQAS in the European Union.

The limit of detection (LOD) of SPARK Quantitative Vitamin D Test is 4 ng/ml (10 nmol/l). The Detection Range of the test is from 4 ng/ml (10 nmol/l) to 100 ng/ml (250 nmol/I).

The accuracy of our Quantitative Vitamin D Test was evaluated using human finger-prick blood samples in comparison with a reference 25-OH Vitamin D ELISA assay using corresponding serum samples. The comparison result showed a linear regression with slope of 1.02 and Correlation Coefficient of 92%.

The accuracy of our Quantitative Vitamin D Test was also evaluated using 20 serum samples in comparison with LC-MS/MS Assay (“Gold Standard” for 25-OH Vitamin D measurement). The comparison result showed a linear regression with the slope of 0.97 and SPARK Correlation Coefficient of 98%.

SPARK Quantitative Vitamin D Test is a Rapid Quantitative assay. The test is intended to
use for screening individuals to identify Vitamin D level. This assay provides only a preliminary analytical test result. The liquid chromatography with tandem mass spectrometry (LC-MS/MS) assays or quantitative immunoassays are recommended to confirm the analytical result.

How safe are your tests?

Our Vitamin D self test kit is absolutely safe to use. It comes conveniently packaged with everything that you need to safely complete your Vitamin D blood serum test in the comfort and safety of your own home. Using the lancet supplied to prick your finger hurts way less than having a needle in your arm and is over in less than a second. Please follow the guide and you will find it is a very easy safe process.

Can children use the tests?

Yes, children can use our Vitamin D self tests under the supervision of an adult. In our testing, children generally tolerated the finger prick and blood collection procedure well.

What is the difference between ng/ml and nmol/L?

Both ng/ml and nmol/L may be used on pathology reports to indicate a serum test result. In New Zealand it is most common to come across Vitamin D measured in nmol/L, in the USA, it is more common to come across ng/ml. In order to ascertain nmol/L, a multiplication factor of 2.5 may be applied to the ng/ml reading. For example, 100ng/ml = 250nmol/L. This becomes very important to look out for when reading literature and watching key note speeches that may have been filmed in other parts of the world. Our Smartphone app allows you to select the preferred unit for measurement.

Frequently Asked Questions

Shipping, Orders & Payments

What is the status of my order?

Once you have placed your order, we will send you a confirmation email to track the status of your order. Once your order is shipped we will send you another email along with the link to track your order. Or, you can track the status of your order from your "order history" section on your account page on the website.

How do I track the progress of an order?

Once your order has been shipped, you will receive an email and a text notification with details of the order. You can track the shipment by clicking on the link provided in the email.

Can I change my order?

We can only change orders that have not been processed for shipping yet. To make changes to your order, please reach out to support by submitting your request via "contact us" form.

What payment methods do you accept?

You can purchase on our website using a Debit or Credit Card, POLi Internet Banking, Google Pay, Apple Pay, PayPal & Afterpay.

How long will it take to ship my order?

Delivery times may vary depending on the location. Normally, once you've placed your order, it usually takes 24 to 48 hours to be delivered anywhere in New Zealand, rural locations may take an additional 24 hours.

Where do you deliver to?

We currently are proud to service
New Zealand customers nationwide - freight free. We are able to deliver to the Pacific Islands and other regions around the world, just send us an email and we will do our best to assist.

What currency will I be billed in?

All orders will be processed in New Zealand Dollars NZD$.

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