Near-infrared has a longer wavelength, allowing it penetrate deeper into the body, whereas deep red is absorbed primarily in the skin. If you care primarily about bones, connective tissue, joints, or your brain, you'll get more cytochrome c-oxidase activation in the mitochondria in those areas from near-infrared. If you care more about skin, go with the red light. That being said, there is some overlap and systemic effects from both. By separating the wavelengths into different products, you can get more of what you want most. IRONFORGE is near-IR and REDFORGE is deep red.
What about far infrared?
That is not near-infrared. The thousands of studies about near-infrared and red light are not related to far infrared and you can't use far infrared as a replacement for near-IR. The difference between red and near-IR wavelengths that have been studies is a 1.3-1.5x longer wavelength. The entire IR range goes to over 1000x longer wavelengths beyond that. It is near-IR and red that have been demonstrated to work so well most likely due to their absorption in the CCO of the mitochondria (though there is one paper that disputes this and posits another mechanism related to micro-mechanical changes related to the viscosity of water).
Do you have an affiliate program?
Yes, but you have to be a customer to join (here's the link to join). We don't give away free products to most affiliates. We will offer discounts ranging from 30-50% depending on audience for high value affiliates, but free products means we'd have promotion from people that don't actually value our products and we don't want that, even if it means we grow a little more slowly at first. We offer only 5.7% commission for the same reason. We want people genuinely excited about our products, not about a high commission rate. To keep pricing consistent for everyone, affiliate links work like Amazon links i.e. without customer discounts.
Exceptions to discount rates and commission rates may be made for current and former professional or collegiate athletes and veterans.
Where can I learn more about sunlight, sleep, and circadian rhythms?
Our Newsletter (Infrequently published, only when we have something to say).