539
people found this helpful, as of 2023
ranked #31,814 most helpful
out of 571,544,897 reviews
★☆☆☆☆
pH level too high!
I just tested this serum with my new pH strips and found it to be 6! L-ascorbic acid is only effective at pH levels of 3.5 or less, which means this serum is completely worthless when it comes to stimulating collagen production. That's the only reason I use vitamin C serums. I will not be purchasing this product again.
the product in question
Timeless Skin Care 20% Vitamin C + E Ferulic Acid Serum - 1 oz - Lightweight, Non-Greasy Formula - Use Daily to Brighten, Restore & Correct Skin - Recommended for All Skin Types
4.3★ · 7,489 ratings, as of 2023