Astragalus and hair loss

I have been taking astragalus for about a year now. I was told that it helps rebuild the immune system, I also am trying it to combat fatigue. I did not take supplements while going through chemo but started once I was done with rads & chemo.

This is a summary of how it is used:

Astragalus


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Latin name: Astragalus membranaceus
Other names: Milk Vetch Root, Huang-qi (Yellow Leader)
A Remedy For:

Tendency to infection
Weak heart

Astragalus boosts the immune system. It's taken for a variety of conditions that can benefit from improved resistance, including acquired immune deficiency syndrome (AIDS), burns and abscesses, chronic colds and flu, fatigue, night sweats, and loss of appetite. It has been used in the treatment of heart failure, liver disease, and kidney ailments. It's also taken to counter the toxic effects of cancer treatment and to relieve the symptoms of Alzheimer's disease.
What It Is; Why It Works
One of the most important herbs in Chinese medicine, Astragalus is a member of the bean family. Its yellow root (source of the Chinese name "Yellow Leader") contains compounds that stimulate the immune system.
In test-tubes, Astragalus has been found to promote the formation of antibodies and increase the production of T-cells, one of the body's key lines of defense against disease. A recent clinical trial verified the herb's ability to boost the supply of infection-fighting white blood cells.
Astragalus also has a proven ability to boost heart function and improve cardiac output. It helps relieve chest distress and breathlessness due to a weakened heart, discourages retention of salt and water, and tends to combat clots. Studies suggest that it may also help protect the heart from damage caused by the Coxsackie B virus.
This remarkable herb has also shown an ability to reverse artificially induced memory deficits, to improve muscle tone in the digestive tract, and protect the liver from mild toxicity. Its value for speeding recovery from cancer chemotherapy is, however, more controversial. When given in conjunction with the cancer drug cyclophosphamide, in at least two studies it made no difference.

Hi, I take mine in capsule form. I guess with the powder you could mix it up with juice or some other liquid - not sure what the flavor would be like but hopefully it won't be too yucky!

I've read great things about Astragalus, but nothing I've read says how much to take to be beneficial.

I'm assuming I'd need to take more than the recommended amount listed on the bottle - but how much more?