Siberian Fir....Glorious, Crisp, Clean, Masculine and Warm, this invigorating essential oil is perfect for the winter months and the holidays.. Spruce Essential Oil is Anti-microbial, antiseptic, antitussive, astringent, anti-infectious, anti-spasmodic, anti-inflammatory, diuretic, diaphoretic, expectorant, and, nervine. Fir Essential Oil Supports the respiratory, nervous, and glandular systems. Essential Oil is Beneficial general tonic, mentally grounding, balancing solar plexus, candida, stimulant to thymus, cortisone-like, prostate, hyperthyroidism, rheumatism, arthritis, bone pain, joints, sciatica pain, poor circulation, colds, flu, infections, anxiety, stress, immuno-depression.