Viviscal can cause an allergic reaction in those with an allergy to fish or shellfish, and use of the product is not recommended for women who are pregnant or breastfeeding, according to Viviscal. Other side effects include dizziness and increased acne, as indicated in customer reviews on Folica.com.
Viviscal is a dietary supplement designed to support hair health and hair growth. The product utilizes the AminoMar marine complex described on Viviscal's website as utilizing specific proteins found in diets rich in fish and shellfish. The presence of this protein in the supplements makes them potentially harmful to those with an allergy to fish or shellfish as it can caused an allergic reaction in these individuals.
Other common side effects not listed on Viviscal's website include the development of cystic acne, dizziness, and fibroid growth. One reviewer on the beauty website Folica.com cites the sudden development of dizziness as a possible side effect of using this product. Another reviewer claims that her doctor recommended she cease taking this supplement after she developed a large fibroid, citing the presence of estrogen in the supplements.
The most common side effect described by reviewers is the development of cystic acne. Multiple reviewers on Folica.com claim to experience a sudden appearance or severe increase of cystic facial acne after taking Viviscal supplements for several months. Most of these reviewers claim that the acne went away once they stopped taking the supplements. Viviscal's website recommends checking with a physician before taking these supplements.