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Certainly Ayurveda is.The best part about it is that the sages were aware of the changing times and could foresee where the world is heading, thus gave nutritional principles which would last till the end of time, not like a fad that would come and go.Since Ayurveda prescribes food types and lifestyle habits as per the individual body constitution and geographical location, it proves to be the most time tested and scientific approach to nutrition, and well-being at large.Now the key is to learn about authentic Ayurveda from genuine sources as there are may out there to sell in the name of ‘magical ayuveda’ thus, tarnishing its reputation.One good speaker on this subject is Mr. Rajiv Dixit.

Massive advancement in science and education.In the past two thousand years of human understanding, it was once mainstream to believe:Bad weather was caused by witches.Disease was caused by demons.The Earth was flat, 6,000 years old, and the universe - which was basically a collection of bright dots, the sun and the moon - revolved around it.These views all came from religious authorities, but even a modern child's understanding makes such positions untenable. In a world where much cannot be explained or understood, religion had great significance to people. But the list of things which can't be rationally explained in a modern world is dwindling.Statistically, the more education a person receives - especially in science - the less religious they become and the less likely they are to remain theists. Contrast the 83% percent of US citizens who say that they believe in God, with the just 33% of scientists who do [1]. Clearly scientific education has increased over the past few millennia and should continue to do so globally.The Age of Enlightenment can account for a great deal too [2]. The freedom of speech, of religion, of thought that has come about in modern times have given many the freedom to question and even denounce religion. When apostasy is punishable by death that's a little less likely.Finally there's an interesting correlation between intelligence (which tends to improve with better nutrition, medicine, technology) and religiosity [3]. Global intelligence - as measured by IQ, at any rate - appears to have increased ever since we would record it, as religion continues a seemingly inexorable decline.[1] http://www.usnews.com/news/blogs/god-and-country/2009/07/16/pew-survey-a-huge-god-gap-between-scientists-and-other-americans[2] http://en.wikipedia.org/wiki/Age_of_Enlightenment[3] http://en.wikipedia.org/wiki/Religiosity_and_intelligence

The link for the question only provides summaries of the research; the details are behind a paywall. Still, I recommend that you read it, or at least the plain language summary: Antioxidant supplements for prevention of mortality in healthy participants and patients with various diseasesIt looks like commonly used antioxidant supplements don’t do much good and might even do some harm.This isn’t an isolated report; there are lots of other reviews showing similar results. Here’s a few that happen to be freely available:Efficacy of vitamin and antioxidant supplements in prevention of cardiovascular disease: systematic review and meta-analysis of randomised controlled trialshttps://s3.amazonaws.com/academia.edu.documents/41228810/Use_of_antioxidant_vita-mins_for_the_pre20160113-22193-8wimyz.pdf20160115-19908-gdovtm.pdf?AWSAccessKeyId=AKIAIWOWYYGZ2Y53UL3A&Expires=1517950898&Signature=pzff2QChtd5RcboOtug7RzrvM7c%3D&response-content-disposition=inline%3B%20filename%3DUse_of_antioxidant_vitamins_for_the_prev.pdfhttp://www.ctu.dk/media/8831/Bjelakovic-Nikolova-and-Gluud-JAMA-2013.pdfhttp://www.rima.org/web/medline_pdf/antioxidantsupplements.pdfDietary Supplements and Risk of Cause-Specific Death, Cardiovascular Disease, and Cancer: A Systematic Review and Meta-Analysis of Primary Prevention Trials 1 – 3 | Advances in Nutrition | Oxford AcademicResearchers have devoted an enormous amount of time and money to this topic despite consistently getting negative results. The article in the link summarizes the results of Seventy-eight randomised trials with 296,707 participants. I can’t think of any reason to keep testing these substances but I am sure that scientists will keep studying them and keep getting negative results.I wouldn’t spend money treating myself with any of the commonly used antioxidant supplements. But many people disagree; this is a popular product class.That said, every compound is different and it’s entirely possible that there are useful antioxidant compounds somewhere. The question mentions Astaxanthin and this review article suggests that it might be promising for future research but, so far, there isn’t any good reason to use it (Astaxanthin: Sources, Extraction, Stability, Biological Activities and Its Commercial Applications—A Review).This book has a very readable introduction to the relevant biochemistry (The molecule that made the world (Oxford Landmark Science): Nick Lane: 9780198784937: Amazon.com: Books). If you can’t get a copy, you can read a very brief overview here: Plugging the Mitochondrial LeakThe author thinks that antioxidant substances may disrupt normal biochemical processes in ways that prevent them from doing any good. If he’s right, all the studies have been a waste of time.