My wife has a thyroid condition and she is taking synthroid, (thyroxine) could she consume fenugreek supplement? ty

Yes: Fenugreek has many health benefits and has no known interaction with Synthroid (thyroxine). See http://tinyurl.com/mcpk93r for more about fenugreek. A high percentage of those with hypothyroidism benefit from either adding T3 or changing to natural Thyroid. See http://tinyurl.com/n4zmkro and http://tinyurl.com/63ood7 and http://tinyurl.com/pgvyeb8