The first and foremost principle of Yoga is that until you do not feel good, you can't look good. Thus yoga through its asana like Sukhasna and Shavasana aims to provide complete relaxation to your body.
Yoga helps you gain physical fitness, helps in the healthy maintenance of mind and body. It also acts in removal of toxins from the body and increases flexibility of your body making you look younger. The Dog and Cat Pose of Yoga is certainly helpful in gaining flexibility and vigor.
Yoga helps improve the efficiency of the immune system. Through regular Pranayams like Kaplabhati and Anulom- Vilom, you can easily avoid little daily problems of health. Yoga is equally active in thyroid and weight loss leading to perfect shaping of the body and thus making you beautiful.
The perfect oxygen dose which we get through various Yoga Asanas and Mudras also helps in skin glow.
Regular yoga brings contentment in your life which reflects on your face.
Yoga helps you in delaying ageing. A regular yoga practitioner remains young and active for quite longer than others who do not practice yoga.