I think by "superfoods", people are mostly referring to chlorella/spirulina.
As with most of these heavily marketed supplements, like "Cardio Miracle", you can get the actual ingredients for 1/50th of the price and make your own. That Cardio Miracle is mostly L-Arginine and L-Citrulline (active ingredients) with some B Vitamins added in (very cheap).
L-Arginine 250 1,000 mg servings for $15
https://www.amazon.com/gp/product/B00EJTZH0Q/ref=as_li_tl?ie=UTF8&camp=1789&creative=390957&creativeASIN=B00EJTZH0Q&linkCode=as2&tag=httpwwwchanco-20 />
L-Citrulline 167 3,000 mg servings for $25
https://www.amazon.com/gp/product/B00NBCVVW0/ref=as_li_tl?ie=UTF8&camp=1789&creative=390957&creativeASIN=B00NBCVVW0&linkCode=as2&tag=httpwwwchanco-20 />
Cardio Miracle doesn't even tell you how much of these ingredients it has in there, just talks about some proprietary blend, and it cost about $3 per day ($1.50 per serving). With the links above to L-Arginine and L-Citrulline, those will last you 3-4 months easy for $40.
Biggest shame about "Cardio Miracle" is that it only has 50% RDA of Vitamin C and the RDA number is pathetically low.
Linus Pauling Institute identified Vitamin C deficiency as THE #1 cause of heart disease and heart problems, and they recommend between 6 and 9 GRAMS (6,000 - 9,000 milligrams).
https://vitamincfoundation.org/wp/https://vitamincfoundation.com/forum/viewtopic.php?f=11&t=15859https://www.einpresswire.com/article/620838813/30-years-ignored-linus-pauling-s-greatest-discoveryIn sum, most heart disease is basically a low-grade form of scurvy, due to Vitamin C deficiency. Human (and one other mammal I can't recall) are the only ones that do not manufacture their own Vitamin C in their body. Based on the equivalent that other animals make on their own, people should be taking 3,000 - 6,000 mg per day, not the absurd 90 mg per day as the US RDA. 90mg per day is almost worthless, and the Cardio Miracle has 50% of that.
Pauling was able to completely reverse heart disease within a matter of a couple months with Vitamin C therapy (and lysine).
Now, if you can afford the Cardio Miracle, that's fine, since it does have a bunch of other stuff in it (though in unspecified, probably trace, amounts) but I would highly recommend also adding in about 5,000 mg per day of Vitamin C. If you get straight ascorbic acid, it can wear on your teeth and cause stomach issues, but if you get sodium ascorbate, it won't have that effect, since it's buffered.
Cardiologists are not taught about Vitamin C (as it would eliminate 90% of their business). And then, Congestive Heart Failure is ultimately due to long-term low levels of potassium (which we don't get nearly enough of in our diets).