Since you are asking this question in a TRT forum, I'm assuming you mean dosage related to TRT. Most people use HCG to prevent testicular atrophy and to restore normal functioning of other glands in the body. The adrenals, seminal vesicles, prostate, and cowpers glands are all known to contain LH receptors. For this purpose most guys find that 500 to 1000 IU per week in divided doses (usually 2-3 per week) is sufficient.

For a TRT monotherapy, most TRT docs don't advocate this approach, but I've seen doses of 1000 IU to 5000 IU thrown around, but there may be substantial E2 side-effects with this approach. I don't personally think it is wise.

For fat loss, save your money. It does not work for this purpose.