斯洛伐克采购需求：杨梅素提取物、杨梅素粉、保健品、植物提取物粉、天然补充剂、杨梅素的健康益处

I'm looking for clean myricetin for therapeutic use, and it's essential that it's free from any harmful solvents. My budget is somewhat limited, so I'm hoping to find a reasonable price. Could you provide the pricing for quantities of 200mg, 500mg, and 1000mg? Additionally, if you have any details about the sourcing and purification process, that would be really helpful. I'm particularly interested in ensuring the highest quality for optimal effectiveness. Thanks in advance for your assistance!