Most users notice: Improved skin comfort and resilience within 23 weeks
It has been suggested that the gut microbiota may affect the absorption of tryptophan and, consequently, the synthesis of serotonin
Potential side effects can include, but are not limited to, the following: Acute kidney injury (typically due to nausea and vomiting) Diabetic retinopathy (damage to the retina, the light-sensitive layer of tissue at the back of the eyeball) Gallbladder dysfunction Abdominal pain and/or bloating, constipation, diarrhea, nausea and/or vomiting Decreased appetite, which can lead to weight loss Increased heart rate Medullary thyroid carcinoma (cancer of the thyroid gland)
Wall, ., Food and Nutrition Guidelines for Healthy Adolescents
Certifications: Some companies on this list offer certificates of analysis (COAs) documents that provide details regarding product quality and purity for their whey protein products