Nature's Answer has identified mother nature's unique botanical fingerprint on over 800 plant reference standards utilizing advanced botanical fingerprint technology. Nature's Answer feature the highest quality of organic, responsibly wildcrafted or cultivated herbs, which maintain the naturally-occurring constituents found in the plant. Vitamin D-3 is vital for many functions in our bodies, vitamin D also influences a host of key biological functions vital to health and well-being. Fingertip Pulse Oximeter Adult is a multi-function Digital pulse oximeter which can be used to measure pulse rate, blood oxygen saturation levels accurately. Easy to Read, support SPO2, pulse, and you can view your result very clear with LED display. Easy to Use, accurate and reliable, one-button operation, just clip it on to your finger and turn it on at the press of a button. Automatic power off after 5s when not in use. Widely applicable, suitable for everyday use. Widely used in family, oxygen bar, physical care in sports, etc. Compact size, this oximeter is lightweight and portable.