MET Tathione 500mg review

MET Tathione has been on Philippine shelves since 2004, which in a category where brands appear and vanish within a year is the most unusual thing about it.

500mg of reduced glutathione, stated plainly

Each capsule is 500mg of reduced glutathione, a single stated dose rather than a combined total shared across several ingredients. Reduced glutathione is the standard, most widely used form, and it’s the one most of the long-running Philippine brands build on.

A caution on comparing that number: a 500mg reduced capsule is not simply “more” than a 200mg S-Acetyl capsule. The forms differ in how much survives digestion, so milligrams across the two aren’t the same unit. Compare reduced against reduced, and read our glutathione supplement buying guide before you treat a bigger number as a better one.

What Algatrium is, and what we can’t confirm

The formula adds Algatrium, which MET Tathione describes as a glutathione-enhancing ingredient. We’ll be straight about the limit of what we can say here. Algatrium is the brand’s own formulation claim, and we found no independent confirmation that it improves on plain reduced glutathione in practice. It isn’t a red flag, since branded ingredients are normal in supplements, but it’s a claim from the seller rather than a verified fact, and it’s part of what you’re paying extra for.

Twenty-two years on the shelf, and what a month costs

At around ₱2,600 as of August 31, 2026 for 30 capsules, that’s roughly ₱87 a day, among the highest daily costs in this category. Several capsules here publish a comparable reduced-glutathione dose for considerably less.

What the premium buys is longevity and distribution. MET Tathione has been sold in the Philippines since 2004, it goes through Watsons’ official Shopee Mall store, and it holds a 4.9 Shopee rating across 4,175 ratings with 10K+ sold. In a category where a listing can disappear along with its warranty, a brand your tita has heard of is a genuine form of reassurance, and some people will happily pay for it.

What the label is allowed to say

Glutathione capsules are sold here as food supplements rather than medicines, and this one is marketed for skin whitening and anti-aging. We can verify the dose, the form, and the brand’s history. We can’t verify that it will change your skin tone, and no seller in this category is permitted to promise that either.

Who should pay for the established name

Buy this if brand history is what makes you comfortable taking something daily, you want a clearly stated single-ingredient reduced dose, and buying through Watsons matters to you. It suits a cautious first-time buyer more than a price-sensitive one. If you’re comparing on cost per milligram, this is one of the least efficient ways to buy reduced glutathione here.

If you want more glutathione for the money

For 1200mg of reduced glutathione with collagen and vitamin C fully itemized, see Tatiomax 1600mg. For a plain 500mg L-glutathione vegicap from another established local brand, see LAC L-Glutathione 500mg. The best glutathione supplements in the Philippines roundup ranks the field.