Neutriherbs products are manufactured in China. While the brand is based in China, it's important to research the specific quality control measures they employ to ensure product safety and efficacy.

Potential side effects of Neutriherbs Vitamin C serum, like any Vitamin C serum, can include mild irritation, redness, or dryness, especially for sensitive skin. Always perform a patch test on a small area of skin before applying to the entire face, and discontinue use if irritation persists.

Some Neutriherbs products, particularly those containing Vitamin C or other brightening agents, may help to even skin tone and reduce the appearance of hyperpigmentation, giving the appearance of lighter skin. However, results vary depending on skin type and consistent product use; it will not drastically alter your natural skin tone.

Neutriherbs is owned by Guangzhou Amarrie Cosmetics Co., Ltd., a cosmetics manufacturer based in Guangzhou, China. They develop, manufacture, and market a range of skincare and personal care products under the Neutriherbs brand.