It’s more like 30 grams with glycine, quite expensive.
There’s a place called Health Sources, they send Sarcosine from China and if you want to order you have to email them, it’s like half the price of smart powders, at least it was like a year ago. I’ve never ordered from them but some people from the old forums have. Minimum is 1 kg and the last time I asked them it was 80 dollars.
Smart Powders is apparently not good with stocking their products because the last time they were out of stock I had to wait over 2 months for it to be back in stock.
If you buy NAC I’d advise against NOW Foods and for Health Sources, tried them both and NOW Foods products made me feel not too good. I read some forum where somebody said that NOW Foods’ products don’t contain exactly what they are supposed to.