Most Reputable Supplement Companies

Life Extension

Pros: Third-party testing, trusted reputation
Cons: Addition of maltodextrin to formulas
Quote: "I’ve started transitioning to Life Extension a month or so ago and have been pleased so far."

Thorne

Pros: Highly regarded, delivers on promises
Quote: "For me, Thorne and Gorilla Mind have always delivered on what they promise."

NOW

Pros: Reputable for most products
Cons: Not as standout as other brands, taste issues with whey protein
Quote: "NOW for everything except fish oils and the like (coconut oil is good though)."

Nootropics Depot

Cons: Considered 'avoid' category by some users
Quote: "Must of never heard of Nootropics Depot."

Double Wood

Cons: Varies between being in B tier or avoid category
Quote: "DoubleWood is B tier."

Pure Encapsulations

Pros: Great and reputable company
Cons: May not be as well-kNOWn as other top brands

Jarrow

Pros: Well-regarded by fans
Cons: Not much negative feedback mentioned

Source Naturals

Pros: Reputable for a variety of supplements
Cons: Not too expensive

Other Reputable Brands

Solgar, Natural Factors, California Gold Nutrition, Nutricost, Solaray, Swisse, Blackmores, Zipvit, PureBulk, Designs for Health, Metagenics, Controlled Labs, Optimum Nutrition, MAN, Carlson, Nordic Naturals, Truenutrition, Healthy Origins, Source Naturals

Avoided or Questionable Brands

Nootropic sellers, MusclePharm, Muscletech, Swanson's Homeopathic section

General Tips and Information

ConsumerLab.com is recommended for checking supplement reviews
Labdoor is suggested for supplement testing
Requesting information on quality control methods and certifications from supplement companies is advised
Some users caution against relying solely on multivitamins, emphasizing the importance of a balanced diet
FDA does inspect supplement manufacturers
Be cautious about MLM schemes for supplements

Miscellaneous Comments

Nurses are seen as credible sources for health information
Some skepticism around the effectiveness of supplements for everyone
Some humor around the MLM schemes related to supplement sales

This comprehensive summary reflects a variety of opinions and experiences shared by Reddit users regarding reputable supplement companies. The brands mentioned cover a range of options for those seeking quality supplements, with considerations for a balanced diet alongside supplementation.