इदम् आगमसिद्धत्वात्प्रत्यक्ष फ़ल्दर्शनात I
मन्त्रवत्संप्रयोक्तव्यं न मिमान्स्यं कथंचन II ( वा. उ. ४०/८१)
Famous Ayurveda Scholar Aacharya Vagbhatta said in his Ashtang hradyam Sanhita dat,
Ayurveda is gifted by God to Mankind to stay healthy by all means on earth.
With lots n lots of experiences and so many sccessful treatments, All scholars and Vaidyas wrote Ayurveda for human being. So there is no chance of doubt.
Ayurveda is like MANTRA, a divine group of words. One definitely takes time to understand it. But it haave strong power to transform the world.One shud never doubt about effectiveness of Ayurveda science.Ayurveda is not science of diseases but its science of LIFE.