Since glycine is naturally produced in the body and found in plenty of common foods, like beans, spinach, asparagus and seaweed, it is highly unlikely to experience an allergic reaction from the consumption of Nutch.* However, on very rare occasions, people have reported nausea, upset stomach, or vomiting after taking glycine, this is usually due to taking much higher quantities than the 3g in each sachet.* In the event of an extremely unlikely severe symptom, immediately contact your healthcare provider, even though it would unlikely be related to Nutch.