There is a lot of debate regarding the penetration of light through tissues, how it works, and whether it is even necessary for the effects of photobiomodulation. In today's LTI Podcast, Dr. Rountree discusses some technical details from two studies to bring to light some answers to the debate about the factors of light penetration.

The studies mentioned in this episode:

Near-infrared photonic energy penetration: can infrared phototherapy effectively reach the human brain?
Effect of wavelength and beam width on penetration in light-tissue interaction using computational methods

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