drveejay, Tonalin is just the Brand name for a specific CLA. Its specific ingredients are:
Ingredients: Eash softgel contains: Tonalin, 1000mg (which yields 700 mg of conjugated linoleic acid); Tonalin proprietary blend of CLA, oleic acid, palmitic acid, stearic acid, linoleic acid, gelatin, glycerin, caramel, carob, titanium dioxide, FD&C Red #40 & Blue #1.
So, you get 700mg of CLA from it. It's like Optimum's CLA One(r), "1000 mg of CLA One (r) that yields 750 mg total CLA and 700 mg of active isomers."
Or, the best CLA for the best price (if you take gold card plus the 50% second bottle), GNC's Pro Performance, "Pro Performance® CLA is 100% CLA derived from safflower seeds, a premium dietary source. Each serving contains 1000 mg of CLA."
The GNC gels are much larger than the Optimum gels. I've never seen the Tonalins. Oh, BTW, they're all derived from Safflower Seeds (all 3 of these ones, atleast).
Hope this helps.

-B