(SmartPowders)Short answer: There is no best brand, only best prices.
Long Answer:
Firstly make sure you aren't being messed around with concentrations. Less is more, on most occasions. Also less is generally safer and more inclined to give you healthy results without side-effects. Just research, sites offer dosages that are ludicrously high for the substance they provide, stuff like Triple-Strength Melatonin is unnecessary. Make sure you understand dosages/chemicals first and prices next. Some sites also pre-stack chemicals like LEF, which is never a good idea. You don't know if one chemical in that bunch could cause a reaction and slow integration is always preferable. Also make sure if you have an extracted chemical that it's concentration is provided, Ginkgo Biloba for instance is often advertised as 6000mg, but that's just leaf extract, the concentrated Gingko there is only 250mg. Gingko is a bad example but you get the idea, don't get cheated out of money for thinking your buying a higher concentration when it's essentially it's diluted. Same goes with chemicals under numerous types, for instance Choline can be provided in CDP, Alpha-GPC, Choline Bitartrate etc. Some sites won't list what kind of Choline is actually provided, Dreamamins for instance provides a Galantamine and Choline product which seems reasonably low priced till you realise they've not provided what sort of Choline is in there. If it's just standard Choline it won't pass the blood-brain barrier therefore it's useless junk. So I just purchased both supplements seperately (SmartPowders provides Galantamine).
Swanson is the best choice however, they're incredibly cheap, provide multiple discounts and have a flat-rate + weight charge for shipping. I recommend you use RetailMeNot to get all sorts of lovely things like 10% off, Free Shipping etc. But for the most part Swanson always has discounts, offers and the prices are just incredibly low. Just purchase from their website and not a 3rd party retailer because 3rd parties don't discount. Anyway aside from that Swanson provides in my opinion one of the biggest selection of supplements, I can find oddly obscure things on their website, I mean literally everything you want is provide and everything is in an acceptable dosage. it's professional and just generally quick and easy. This is coming from someone living in England, so the costs are even low plus international shipping that it has diverted me purchasing from domestic suppliers.
Source Naturals, is moderately pricey but they provide certain goods that I can only get from them. You can purchase their stuff through Swanson anyway and it is generally 30-50% off so it's not too shabby. They're one the few places I can actually get L-Dopa from Mucuna Pruriens (a type of bean), most retailers just sell the actual bean, L-Dopa is very hard to obtain otherwise. Regardless of that they also don't do silly stacks, which most companies do when providing Nootropic type substances, for instance Life-Enhancement provides GalantaMind and that's upwards of $60-100, that product its filled with sleep substances which don't even mix with eachother. Vitamin B5 with 5-HTP for instance just causes Seratonin to metabolize in the gut not in the brain. You'll find Source Naturals on a lot of Nootropic retailers (SmartPowders) because they just provide things simple and plain, no extra crap and no flashy brand labelling.
Dr.Best I would avoid, they're very pricy for traditional supplements, I don't know how much they cost in Argentina, but in England most brands far outweigh them in terms of affordability on supplements across the board i.e Select Healthy, Valupak, Higher Nature, Fortis Health and even Centrum and they are awfully priced and packaged (they're the providers of general Pharmaceutical supplements and tend to package things really flash for dumb consumers). Aside from that I just really dislike their marketing and brand labeling, they smack of that whole Consumer Ignorance/Impulse buying similar to Centrum. They wash their labeling in Brian Boosting and Health Boosting exaggerated tags, that plus the high cost generally makes it clear they're catering to someone who hasn't done their research on how Nootropics/Health Supplements actually affect them. Just avoid basically.
LEF is much worse then Dr. Best because they provide more expensive stuff like Acetyl-L-Carnitine Arginate which is like $59.99 or $39.99 on SmartPowders with a discount, for comparison Swanson does that for $19.95. Less tabs but way cheaper. They're even selling Omega-3 for like $30 and that's only 120 softgel tablets, I can acquire 150 tabs for $4.99! In general I find buying stuff from brands like this a bad idea. Anything
slathered in "Life-Enhancement" with a bunch of added supplements, then slapped with a name like "Ultra Sleep Complex" is a dumb idea + celebrity endorsements from stuff like "The Suzane Show".
Out of the others I haven't had much experience with NOW and Jarrow's. Lastly I just think Nature's Way has an awfully small selection.
Edited by Drax-Quin, 06 October 2012 - 03:25 PM.