Is shedding a sign of balding?

Shedding can sometimes be a sign of balding. I suggest seeing a hair loss expert now to evaluate and go over your condition and provide you information about your best treatment options. There are great non-invasive options like prp/progesterone and/or hair transplantation. See an expert. Best, Dr. Emer

No not necessarily. Shedding is a normal process that takes place during the hair cycle. Shedding can occur with telogen effluvium while miniaturization is typical of male pattern baldness. 

Shedding is a normal process as hairs go through their life cycle. Generally it's not something to worry about unless you see a significant increase in the rate of shedding, or there are visible/tactile changes to the density of your hair.

The answer is generally No.  Hereditary or male pattern baldness is generally characterized by miniaturized hairs.  While the hair cycle may speed up slightly, the number of hair lost daily may increase by 10% or so, which is not sufficient to classify as shedding.
Shedding is more typical of telogen effluvium or other acute or stress related hair losses.
I recommend you see a specialist who specializes in hair growth and can provide a thorough comprehensive hair loss consultation including a digital microscopy to work out exactly what is going on for you and then create a personalized program to reverse that process and regrow your hair.
Best of luck!

Probably , because miniaturisation and shedding of hair is a sign of  AGA. But It is natural for human to lose daily 5-100 hair shaft in telogen phase, and it is an expected outcome of hair cycle. These hairs appear again and grow back. About 10% of all hair on our heads is in the telogen phase and they shed daily.

shedding could be caused by a number of things and not all are pathologic. Meaning normal shedding happens as part of normal hair life cycle.  It's normal to lose about 100 hairs everyday.  I still advice you to see a specialist to rule out pathologic causes of hair loss some of which are treatable.  
Ramtin A. Cohanim M.D. 

Shedding can be a sign of balding. It can also be a sign of telogen effluvium, alopecia areata, chemotherapy induced hair loss and scarring alopecia. Please see a hair specialist to determine the cause.

If you are a male and shedding, your biggest enemy is the progressive thinning leading to a balding pattern that is not evident at this point in time. The degree of thinning that you are experiencing would suggest that you should see a doctor who most likely will get Bulk Measurements of your hair to determine the degree of the thinning that you are presently having. If the diagnosis is early genetic hair loss (the most common cause of hair loss in young men), then the best treatment would be the drug finasteride which is highly effective in men of your age and may not only stop the hair loss but possibly reverse it. If you are developing a more advanced balding pattern the best test to get will determine the Bulk Measurements of your hair and this will show, over a one-year time frame, how effective the treatment will be. Once you know this information, then you and your doctor need to develop a MASTER PLAN which will define what you need to do over the years to come.