Edited
http://www.liverdoctor.com/index.php?page=liver-tonics
Specifically you may want to look at what ingredients they are using for their liver tonic, amino acids that you are interested in!!!
Also:
SYMPTOMS ASSOCIATED WITH LIVER DYSFUNCTION
Abnormal metabolism of fats
Abnormalities in the level of fats in the blood stream. For example; elevated LDL cholesterol and reduced HDL cholesterol and elevated triglycerides.
Arteries blocked with fat, leading to high blood pressure, heart attacks and strokes.
Build up of fat in other body organs (fatty degeneration of organs).
Lumps of fat in the skin (lipomas and other fatty tumors).
Excessive weight gain, which may lead to obesity.
Inability to lose weight even while dieting.
Sluggish metabolism.
Protuberant abdomen (pot belly).
Cellulite.
Fatty liver.
Roll of fat around the upper abdomen - (liver roll).
Digestive problems
Indigestion.
Reflux.
Haemorrhoids.
Gall stones and gall bladder disease.
Intolerance to fatty foods.
Intolerance to alcohol.
Nausea and vomiting attacks.
Abdominal bloating.
Constipation.
Irritable bowel syndrome.
Pain over the liver - (upper right corner of abdomen & lower right rib cage).
Blood
Sugar problems
Craving for sugar.
Hypoglycaemia and unstable blood
Sugar levels.
Mature onset diabetes (Type 2) is common in those with a fatty liver.
Nervous system
Depression.
Mood changes such as anger and irritability.
Metaphysically the liver is known as the "seat of anger".
Poor concentration and "foggy brain".
Overheating of the body, especially the face and torso.
Recurrent headaches (including migraine) associated with nausea.
Immune dysfunction
Allergies - sinusitis, hay fever, asthma, dermatitis, hives, etc.
Multiple food and chemical sensitivities.
Skin rashes and inflammations.
Increased risk of autoimmune diseases.
Chronic Fatigue Syndrome.
Fibromyalgia.
Increase in recurrent viral, bacterial and parasitic infections.
External signs
Coated tongue.
Bad breath.
Skin rashes.
Itchy skin (pruritus).
Excessive sweating.
Offensive body odour.
Dark circles under the eyes.
Yellow discoloration of the eyes.
Red, swollen, itchy eyes (allergic eyes).
Acne rosacea - (red pimples around the nose, cheeks and chin).
Brownish spots and blemishes on the skin (liver spots).
Red palms and soles which may also be itchy and inflamed.
Flushed facial appearance or excessive facial blood vessels (capillaries/ veins).
Hormonal Imbalance
Intolerance to hormone replacement therapy or the contraceptive pill (eg. side effects)
Menopausal symptoms such as hot flushes may be more severe.
Premenstrual syndrome may be more severe.