Thank you very much mrsD for your prompt response. I have ordered Doctor's Best R-Lipoic Acid Stabilized, Source Naturals Methylcobalamin, Vitamin Shoppe Acetyl-L-Carnitine, and Source Naturals L-Theanine from Vitamin Shoppe. Some of the stores do not ship health supplements to Singapore eg Amazon.
Your willingness to help others with medical problems is exceptional and is to be applauded and I appreciate that very much. I will keep you updated on my progress once the supplements arrive. They informed me that they are on the way and I eagerly await their arrival. Best wishes to you.

David, will be interested how you go with delivery. I used iherb to Australia, $12 shipping and arrived in about 1 week.

Thanks RideOn
I will check iherb out. The shipping charge from Vitamin Shoppe was about $65 for about 6 small bottles. Cheers

iherb.com is wonderful. They have so much there, and are prompt and the products have long expiration dates, and they ship just about anywhere. Their discounts are good too.

Hi mrsD and RideOn
Just to let you know that I have ordered some bottles from iherb and yes they have a wide range of products. Their catalogue is also very organized and I can find lots of products under the doctors best brand. Their shipping charges to Singapore are just $12 by DHL, otherwise its free if tracking is not required. Their product prices are also cheaper for a start.
I will certainly go back to them for future supplies.
Thanks again for this recommendation RideOn.
Wish all good health.

I Have been following this thread.
This product has been available for a while now.
I have noted mrsD's comments about it, but was wondering if anyone has actually tryed it & if there have been any results either good or bad.